./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- 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 11:33:36,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:33:36,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:33:36,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:33:36,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:33:36,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:33:36,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:33:36,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:33:36,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:33:36,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:33:36,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:33:36,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:33:36,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:33:36,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:33:36,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:33:36,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:33:36,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:33:36,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:33:36,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:33:36,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:33:36,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:33:36,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:33:36,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:33:36,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:33:36,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:33:36,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:33:36,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:33:36,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:33:36,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:33:36,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:33:36,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:33:36,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:33:36,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:33:36,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:33:36,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:33:36,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:33:36,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:33:36,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:33:36,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:33:36,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:33:36,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:33:36,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 11:33:36,708 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:33:36,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:33:36,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:33:36,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:33:36,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:33:36,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:33:36,718 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:33:36,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:33:36,719 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:33:36,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:33:36,719 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:33:36,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:33:36,719 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:33:36,720 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:33:36,720 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:33:36,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:33:36,720 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:33:36,720 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:33:36,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:33:36,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:33:36,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:33:36,722 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:33:36,722 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:33:36,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:33:36,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:33:36,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:33:36,723 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:33:36,723 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:33:36,723 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:33:36,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:33:36,723 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:33:36,724 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:33:36,724 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:33:36,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:33:36,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:33:36,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:33:36,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:33:36,725 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:33:36,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:33:36,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:33:36,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:33:36,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:33:36,726 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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-12-14 11:33:36,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:33:36,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:33:36,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:33:36,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:33:36,912 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:33:36,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-12-14 11:33:39,417 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:33:39,569 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:33:39,569 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-12-14 11:33:39,574 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/data/6777b5f3b/fa9d3b21057e44158f03464ea0e50221/FLAG5d3c8c149 [2022-12-14 11:33:39,584 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/data/6777b5f3b/fa9d3b21057e44158f03464ea0e50221 [2022-12-14 11:33:39,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:33:39,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:33:39,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:33:39,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:33:39,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:33:39,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:33:39" (1/1) ... [2022-12-14 11:33:39,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c96fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:39, skipping insertion in model container [2022-12-14 11:33:39,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:33:39" (1/1) ... [2022-12-14 11:33:39,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:33:39,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:33:39,721 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:39,722 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:39,724 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:39,725 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:39,726 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:39,727 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:39,732 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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-12-14 11:33:39,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:33:39,748 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 11:33:39,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@607f6715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:39, skipping insertion in model container [2022-12-14 11:33:39,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:33:39,749 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 11:33:39,750 INFO L158 Benchmark]: Toolchain (without parser) took 162.74ms. Allocated memory is still 144.7MB. Free memory was 107.9MB in the beginning and 97.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:33:39,751 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 144.7MB. Free memory is still 112.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:33:39,751 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.18ms. Allocated memory is still 144.7MB. Free memory was 107.9MB in the beginning and 97.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:33:39,752 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 144.7MB. Free memory is still 112.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 161.18ms. Allocated memory is still 144.7MB. Free memory was 107.9MB in the beginning and 97.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- 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 11:33:41,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:33:41,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:33:41,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:33:41,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:33:41,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:33:41,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:33:41,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:33:41,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:33:41,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:33:41,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:33:41,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:33:41,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:33:41,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:33:41,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:33:41,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:33:41,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:33:41,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:33:41,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:33:41,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:33:41,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:33:41,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:33:41,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:33:41,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:33:41,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:33:41,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:33:41,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:33:41,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:33:41,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:33:41,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:33:41,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:33:41,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:33:41,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:33:41,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:33:41,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:33:41,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:33:41,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:33:41,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:33:41,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:33:41,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:33:41,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:33:41,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 11:33:41,271 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:33:41,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:33:41,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:33:41,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:33:41,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:33:41,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:33:41,273 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:33:41,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:33:41,273 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:33:41,273 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:33:41,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:33:41,274 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:33:41,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:33:41,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:33:41,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:33:41,275 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:33:41,275 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:33:41,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:33:41,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:33:41,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:33:41,276 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:33:41,276 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:33:41,276 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:33:41,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:33:41,276 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:33:41,276 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 11:33:41,277 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 11:33:41,277 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:33:41,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:33:41,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:33:41,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 11:33:41,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:33:41,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:33:41,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:33:41,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:33:41,278 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 11:33:41,278 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 11:33:41,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:33:41,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 11:33:41,279 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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-12-14 11:33:41,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:33:41,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:33:41,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:33:41,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:33:41,536 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:33:41,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-12-14 11:33:44,149 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:33:44,305 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:33:44,305 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-12-14 11:33:44,311 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/data/27bcb5087/3bbf4d76c88c4e92bd36b336e2424a8c/FLAG43bd9531e [2022-12-14 11:33:44,322 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/data/27bcb5087/3bbf4d76c88c4e92bd36b336e2424a8c [2022-12-14 11:33:44,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:33:44,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:33:44,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:33:44,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:33:44,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:33:44,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e7c484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44, skipping insertion in model container [2022-12-14 11:33:44,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:33:44,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:33:44,461 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,463 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,465 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,467 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,468 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,473 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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-12-14 11:33:44,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:33:44,490 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 11:33:44,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:33:44,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,505 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,507 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,511 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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-12-14 11:33:44,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:33:44,524 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:33:44,538 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,540 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,541 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,542 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 11:33:44,543 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 11:33:44,547 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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-12-14 11:33:44,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:33:44,565 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:33:44,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44 WrapperNode [2022-12-14 11:33:44,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:33:44,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:33:44,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:33:44,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:33:44,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,596 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-12-14 11:33:44,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:33:44,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:33:44,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:33:44,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:33:44,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,618 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:33:44,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:33:44,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:33:44,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:33:44,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (1/1) ... [2022-12-14 11:33:44,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:33:44,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:33:44,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:33:44,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:33:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:33:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 11:33:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:33:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 11:33:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 11:33:44,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 11:33:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 11:33:44,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 11:33:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 11:33:44,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 11:33:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 11:33:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 11:33:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:33:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:33:44,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:33:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:33:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 11:33:44,685 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 11:33:44,775 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:33:44,782 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:33:45,203 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:33:45,279 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:33:45,279 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 11:33:45,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:33:45 BoogieIcfgContainer [2022-12-14 11:33:45,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:33:45,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:33:45,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:33:45,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:33:45,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:33:44" (1/3) ... [2022-12-14 11:33:45,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749b4ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:33:45, skipping insertion in model container [2022-12-14 11:33:45,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:33:44" (2/3) ... [2022-12-14 11:33:45,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749b4ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:33:45, skipping insertion in model container [2022-12-14 11:33:45,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:33:45" (3/3) ... [2022-12-14 11:33:45,290 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2022-12-14 11:33:45,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:33:45,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-14 11:33:45,308 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 11:33:45,378 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 11:33:45,407 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:33:45,420 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 180 transitions, 384 flow [2022-12-14 11:33:45,423 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 180 transitions, 384 flow [2022-12-14 11:33:45,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-12-14 11:33:45,485 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-12-14 11:33:45,485 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 11:33:45,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 12/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-12-14 11:33:45,491 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-14 11:34:06,042 INFO L134 LiptonReduction]: Checked pairs total: 3860 [2022-12-14 11:34:06,042 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-12-14 11:34:06,049 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-12-14 11:34:06,126 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:06,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:34:06,144 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;@72689187, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:34:06,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-14 11:34:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:34:06,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:06,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:34:06,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash 23516, now seen corresponding path program 1 times [2022-12-14 11:34:06,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:06,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598772997] [2022-12-14 11:34:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:06,166 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 11:34:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:06,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:06,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:34:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:06,325 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 11:34:06,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:06,326 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:06,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598772997] [2022-12-14 11:34:06,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598772997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:06,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:06,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:34:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420614627] [2022-12-14 11:34:06,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:06,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:34:06,368 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 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 11:34:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:06,618 INFO L93 Difference]: Finished difference Result 752 states and 2568 transitions. [2022-12-14 11:34:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:06,620 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 11:34:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:06,639 INFO L225 Difference]: With dead ends: 752 [2022-12-14 11:34:06,639 INFO L226 Difference]: Without dead ends: 752 [2022-12-14 11:34:06,639 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 11:34:06,642 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:06,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:34:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-12-14 11:34:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2022-12-14 11:34:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 749 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2568 transitions. [2022-12-14 11:34:06,710 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2568 transitions. Word has length 2 [2022-12-14 11:34:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:06,710 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2568 transitions. [2022-12-14 11:34:06,710 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 11:34:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2568 transitions. [2022-12-14 11:34:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:34:06,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:06,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:34:06,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:06,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:06,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash 23357, now seen corresponding path program 1 times [2022-12-14 11:34:06,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:06,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563665201] [2022-12-14 11:34:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:06,918 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 11:34:06,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:06,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:06,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:07,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:34:07,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:07,111 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:34:07,112 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 11:34:07,131 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 11:34:07,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:07,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:07,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563665201] [2022-12-14 11:34:07,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563665201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:07,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:07,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:34:07,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048577092] [2022-12-14 11:34:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:07,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:34:07,134 INFO L87 Difference]: Start difference. First operand 750 states and 2568 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 11:34:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:07,294 INFO L93 Difference]: Finished difference Result 749 states and 2566 transitions. [2022-12-14 11:34:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:07,294 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 11:34:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:07,298 INFO L225 Difference]: With dead ends: 749 [2022-12-14 11:34:07,298 INFO L226 Difference]: Without dead ends: 749 [2022-12-14 11:34:07,298 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 11:34:07,299 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:07,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-12-14 11:34:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-12-14 11:34:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.158833063209076) internal successors, (2566), 748 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-12-14 11:34:07,318 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-12-14 11:34:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:07,318 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-12-14 11:34:07,318 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 11:34:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-12-14 11:34:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:34:07,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:07,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:34:07,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 11:34:07,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:07,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash 23358, now seen corresponding path program 1 times [2022-12-14 11:34:07,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:07,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264088299] [2022-12-14 11:34:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:07,525 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 11:34:07,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:07,537 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:07,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:34:07,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:07,763 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:07,763 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 11:34:07,789 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 11:34:07,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:07,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:07,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264088299] [2022-12-14 11:34:07,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264088299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:07,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:07,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:34:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130102013] [2022-12-14 11:34:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:34:07,791 INFO L87 Difference]: Start difference. First operand 749 states and 2566 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 11:34:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:07,994 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-12-14 11:34:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:07,994 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 11:34:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:07,997 INFO L225 Difference]: With dead ends: 749 [2022-12-14 11:34:07,997 INFO L226 Difference]: Without dead ends: 749 [2022-12-14 11:34:07,997 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 11:34:07,999 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:07,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:34:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-12-14 11:34:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-12-14 11:34:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-12-14 11:34:08,023 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-12-14 11:34:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:08,023 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-12-14 11:34:08,023 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 11:34:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-12-14 11:34:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:34:08,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:08,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:34:08,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:08,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:08,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash 728797, now seen corresponding path program 1 times [2022-12-14 11:34:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:08,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586151417] [2022-12-14 11:34:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:08,226 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 11:34:08,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:08,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:08,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:08,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:34:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:08,350 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-12-14 11:34:08,350 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 47 [2022-12-14 11:34:08,439 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 11:34:08,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:08,439 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:08,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586151417] [2022-12-14 11:34:08,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586151417] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:08,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:08,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:34:08,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484663848] [2022-12-14 11:34:08,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:08,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:08,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:08,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:08,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:34:08,441 INFO L87 Difference]: Start difference. First operand 749 states and 2565 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 11:34:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:08,636 INFO L93 Difference]: Finished difference Result 623 states and 2064 transitions. [2022-12-14 11:34:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:08,637 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 11:34:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:08,641 INFO L225 Difference]: With dead ends: 623 [2022-12-14 11:34:08,641 INFO L226 Difference]: Without dead ends: 623 [2022-12-14 11:34:08,641 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 11:34:08,642 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:08,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:34:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-12-14 11:34:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2022-12-14 11:34:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 519 states have (on average 3.976878612716763) internal successors, (2064), 622 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2064 transitions. [2022-12-14 11:34:08,658 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2064 transitions. Word has length 3 [2022-12-14 11:34:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:08,659 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 2064 transitions. [2022-12-14 11:34:08,659 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 11:34:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2064 transitions. [2022-12-14 11:34:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:34:08,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:08,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:34:08,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:08,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:08,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:08,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:08,862 INFO L85 PathProgramCache]: Analyzing trace with hash 728798, now seen corresponding path program 1 times [2022-12-14 11:34:08,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:08,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954302138] [2022-12-14 11:34:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:08,863 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 11:34:08,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:08,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:08,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 11:34:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:09,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:34:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:09,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:09,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:09,153 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 11:34:09,153 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 3 case distinctions, treesize of input 15 treesize of output 33 [2022-12-14 11:34:09,173 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 11:34:09,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 11:34:09,241 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 11:34:09,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:09,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:09,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954302138] [2022-12-14 11:34:09,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954302138] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:09,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:09,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-12-14 11:34:09,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59688791] [2022-12-14 11:34:09,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:09,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:34:09,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:34:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:34:09,350 INFO L87 Difference]: Start difference. First operand 623 states and 2064 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:09,523 INFO L93 Difference]: Finished difference Result 497 states and 1563 transitions. [2022-12-14 11:34:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 11:34:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:09,527 INFO L225 Difference]: With dead ends: 497 [2022-12-14 11:34:09,527 INFO L226 Difference]: Without dead ends: 497 [2022-12-14 11:34:09,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:34:09,528 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:09,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:34:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-12-14 11:34:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-12-14 11:34:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 421 states have (on average 3.7125890736342044) internal successors, (1563), 496 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1563 transitions. [2022-12-14 11:34:09,541 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1563 transitions. Word has length 3 [2022-12-14 11:34:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:09,542 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1563 transitions. [2022-12-14 11:34:09,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1563 transitions. [2022-12-14 11:34:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:34:09,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:09,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:34:09,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 11:34:09,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:09,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 728639, now seen corresponding path program 1 times [2022-12-14 11:34:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:09,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735338156] [2022-12-14 11:34:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:09,747 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 11:34:09,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:09,750 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:09,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 11:34:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:34:09,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:09,960 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:09,960 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 11:34:10,015 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 11:34:10,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:10,177 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 11:34:10,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735338156] [2022-12-14 11:34:10,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735338156] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1491938140] [2022-12-14 11:34:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:10,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:10,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:10,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:10,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 11:34:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:10,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:34:10,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:10,375 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:10,375 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 11:34:10,404 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 11:34:10,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:10,459 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 11:34:10,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1491938140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997251109] [2022-12-14 11:34:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:10,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:10,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:10,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:10,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:34:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:10,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:34:10,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:10,594 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:10,595 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 11:34:10,633 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 11:34:10,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:10,735 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 11:34:10,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997251109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:10,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:34:10,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 11:34:10,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703917157] [2022-12-14 11:34:10,736 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:10,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:34:10,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:10,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:34:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:34:10,737 INFO L87 Difference]: Start difference. First operand 497 states and 1563 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:11,976 INFO L93 Difference]: Finished difference Result 1486 states and 4685 transitions. [2022-12-14 11:34:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:34:11,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 11:34:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:11,983 INFO L225 Difference]: With dead ends: 1486 [2022-12-14 11:34:11,983 INFO L226 Difference]: Without dead ends: 1486 [2022-12-14 11:34:11,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:34:11,984 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 215 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:11,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 15 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 11:34:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-12-14 11:34:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 500. [2022-12-14 11:34:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.7004716981132075) internal successors, (1569), 499 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1569 transitions. [2022-12-14 11:34:11,999 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1569 transitions. Word has length 3 [2022-12-14 11:34:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:12,003 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1569 transitions. [2022-12-14 11:34:12,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1569 transitions. [2022-12-14 11:34:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:34:12,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:12,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:34:12,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:34:12,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 11:34:12,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 11:34:12,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:12,608 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:12,609 INFO L85 PathProgramCache]: Analyzing trace with hash 700389652, now seen corresponding path program 1 times [2022-12-14 11:34:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:12,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165357660] [2022-12-14 11:34:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:12,610 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 11:34:12,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:12,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:12,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:12,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:34:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:12,741 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 11:34:12,742 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 11:34:12,820 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 11:34:12,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:12,821 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:12,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165357660] [2022-12-14 11:34:12,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165357660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:12,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:12,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:34:12,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072488837] [2022-12-14 11:34:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:34:12,822 INFO L87 Difference]: Start difference. First operand 500 states and 1569 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 11:34:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:12,943 INFO L93 Difference]: Finished difference Result 470 states and 1484 transitions. [2022-12-14 11:34:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:12,943 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 11:34:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:12,945 INFO L225 Difference]: With dead ends: 470 [2022-12-14 11:34:12,945 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 11:34:12,945 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 11:34:12,945 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:12,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 11:34:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-12-14 11:34:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6551724137931036) internal successors, (1484), 469 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1484 transitions. [2022-12-14 11:34:12,953 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1484 transitions. Word has length 5 [2022-12-14 11:34:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:12,953 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1484 transitions. [2022-12-14 11:34:12,953 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 11:34:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1484 transitions. [2022-12-14 11:34:12,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:34:12,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:12,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:34:12,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:13,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:13,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash 700389653, now seen corresponding path program 1 times [2022-12-14 11:34:13,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:13,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802301205] [2022-12-14 11:34:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:13,158 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 11:34:13,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:13,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:13,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:34:13,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:13,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:13,369 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 11:34:13,370 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 11:34:13,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 11:34:13,539 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 11:34:13,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:13,735 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 11:34:13,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802301205] [2022-12-14 11:34:13,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802301205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [962832737] [2022-12-14 11:34:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:13,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:13,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:13,736 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:13,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 11:34:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:34:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:13,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:13,931 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 11:34:13,931 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 11:34:13,945 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 11:34:14,025 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 11:34:14,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:14,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [962832737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:14,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:34:14,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 11:34:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231619857] [2022-12-14 11:34:14,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:14,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:14,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:14,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:14,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:34:14,027 INFO L87 Difference]: Start difference. First operand 470 states and 1484 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 11:34:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:14,153 INFO L93 Difference]: Finished difference Result 440 states and 1399 transitions. [2022-12-14 11:34:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:14,153 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 11:34:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:14,155 INFO L225 Difference]: With dead ends: 440 [2022-12-14 11:34:14,155 INFO L226 Difference]: Without dead ends: 440 [2022-12-14 11:34:14,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:34:14,156 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:14,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-12-14 11:34:14,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-12-14 11:34:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6056701030927836) internal successors, (1399), 439 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1399 transitions. [2022-12-14 11:34:14,163 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1399 transitions. Word has length 5 [2022-12-14 11:34:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:14,163 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1399 transitions. [2022-12-14 11:34:14,163 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 11:34:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1399 transitions. [2022-12-14 11:34:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:34:14,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:14,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:34:14,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:14,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:14,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:14,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash 237237211, now seen corresponding path program 1 times [2022-12-14 11:34:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:14,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243872882] [2022-12-14 11:34:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:14,568 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 11:34:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:14,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:14,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:34:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:14,689 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:34:14,689 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 11:34:14,704 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 11:34:14,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:14,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:14,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243872882] [2022-12-14 11:34:14,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243872882] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:14,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:14,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:34:14,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132119571] [2022-12-14 11:34:14,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:14,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:34:14,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:14,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:34:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:34:14,706 INFO L87 Difference]: Start difference. First operand 440 states and 1399 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:14,817 INFO L93 Difference]: Finished difference Result 258 states and 798 transitions. [2022-12-14 11:34:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:34:14,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 11:34:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:14,819 INFO L225 Difference]: With dead ends: 258 [2022-12-14 11:34:14,819 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 11:34:14,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 11:34:14,819 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:14,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 11:34:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-12-14 11:34:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 237 states have (on average 3.367088607594937) internal successors, (798), 257 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 798 transitions. [2022-12-14 11:34:14,826 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 798 transitions. Word has length 6 [2022-12-14 11:34:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:14,827 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 798 transitions. [2022-12-14 11:34:14,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 798 transitions. [2022-12-14 11:34:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:34:14,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:14,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:34:14,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 11:34:15,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:15,028 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash 237237212, now seen corresponding path program 1 times [2022-12-14 11:34:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:15,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714621794] [2022-12-14 11:34:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:15,031 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 11:34:15,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:15,034 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:15,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:34:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:15,180 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 11:34:15,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:15,332 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 25 treesize of output 21 [2022-12-14 11:34:15,396 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 11:34:15,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:15,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714621794] [2022-12-14 11:34:15,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714621794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:15,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025879826] [2022-12-14 11:34:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:15,397 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:15,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:15,398 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:15,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 11:34:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:15,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:34:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:15,593 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:15,593 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 11:34:15,756 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 11:34:15,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:16,006 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 11:34:16,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2025879826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496580837] [2022-12-14 11:34:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:16,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:16,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:16,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:34:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:34:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:16,139 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:16,140 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 11:34:16,193 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 11:34:16,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:16,255 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 11:34:16,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496580837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:16,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:34:16,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-12-14 11:34:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242731030] [2022-12-14 11:34:16,256 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:16,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:34:16,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:34:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:34:16,257 INFO L87 Difference]: Start difference. First operand 258 states and 798 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:17,419 INFO L93 Difference]: Finished difference Result 1210 states and 3746 transitions. [2022-12-14 11:34:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:34:17,420 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 11:34:17,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:17,425 INFO L225 Difference]: With dead ends: 1210 [2022-12-14 11:34:17,425 INFO L226 Difference]: Without dead ends: 1210 [2022-12-14 11:34:17,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:34:17,426 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 724 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:17,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 32 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:34:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-12-14 11:34:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 308. [2022-12-14 11:34:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 287 states have (on average 3.5261324041811846) internal successors, (1012), 307 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1012 transitions. [2022-12-14 11:34:17,443 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1012 transitions. Word has length 6 [2022-12-14 11:34:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:17,443 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 1012 transitions. [2022-12-14 11:34:17,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1012 transitions. [2022-12-14 11:34:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:34:17,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:17,443 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 11:34:17,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 11:34:17,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:17,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:34:18,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:18,046 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:18,048 INFO L85 PathProgramCache]: Analyzing trace with hash 236557182, now seen corresponding path program 2 times [2022-12-14 11:34:18,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:18,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541209525] [2022-12-14 11:34:18,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:34:18,050 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 11:34:18,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:18,051 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:18,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:18,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:34:18,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:34:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:34:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:18,247 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:18,247 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 11:34:18,362 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 11:34:18,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:18,885 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 11:34:18,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541209525] [2022-12-14 11:34:18,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541209525] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:18,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1279170687] [2022-12-14 11:34:18,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:34:18,886 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:18,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:18,887 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:18,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 11:34:19,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:34:19,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:34:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:34:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:19,143 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:19,143 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 11:34:19,208 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 11:34:19,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:19,921 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 11:34:19,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1279170687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787468588] [2022-12-14 11:34:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:34:19,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:19,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:19,922 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:19,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:34:20,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:34:20,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:34:20,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:34:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:20,107 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:20,107 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 11:34:20,159 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 11:34:20,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:20,292 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 11:34:20,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787468588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:20,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:34:20,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 11:34:20,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397716283] [2022-12-14 11:34:20,293 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:20,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:34:20,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:20,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:34:20,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:34:20,294 INFO L87 Difference]: Start difference. First operand 308 states and 1012 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:23,945 INFO L93 Difference]: Finished difference Result 2722 states and 9032 transitions. [2022-12-14 11:34:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:34:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 11:34:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:23,957 INFO L225 Difference]: With dead ends: 2722 [2022-12-14 11:34:23,957 INFO L226 Difference]: Without dead ends: 2722 [2022-12-14 11:34:23,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:34:23,958 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 783 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:23,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 78 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 11:34:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2022-12-14 11:34:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 314. [2022-12-14 11:34:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 293 states have (on average 3.4948805460750854) internal successors, (1024), 313 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1024 transitions. [2022-12-14 11:34:23,981 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1024 transitions. Word has length 6 [2022-12-14 11:34:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:23,981 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 1024 transitions. [2022-12-14 11:34:23,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1024 transitions. [2022-12-14 11:34:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:34:23,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:23,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:23,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:24,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 11:34:24,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:24,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:24,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:24,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:24,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1235577953, now seen corresponding path program 1 times [2022-12-14 11:34:24,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:24,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413812338] [2022-12-14 11:34:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:24,584 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 11:34:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:24,585 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:24,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:34:24,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:24,745 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:24,745 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 11:34:24,846 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 11:34:24,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:25,133 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 11:34:25,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:25,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413812338] [2022-12-14 11:34:25,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413812338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:25,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1086755645] [2022-12-14 11:34:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:25,133 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:25,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:25,134 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:25,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 11:34:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:34:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:25,355 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 11:34:25,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:25,550 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 11:34:25,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1086755645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:25,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184247349] [2022-12-14 11:34:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:25,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:25,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:25,551 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:25,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 11:34:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:34:25,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:25,645 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 11:34:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:25,665 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 11:34:25,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184247349] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:25,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:34:25,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-12-14 11:34:25,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415380172] [2022-12-14 11:34:25,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:25,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:34:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:34:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:34:25,667 INFO L87 Difference]: Start difference. First operand 314 states and 1024 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:28,264 INFO L93 Difference]: Finished difference Result 815 states and 2597 transitions. [2022-12-14 11:34:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:34:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:34:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:28,267 INFO L225 Difference]: With dead ends: 815 [2022-12-14 11:34:28,267 INFO L226 Difference]: Without dead ends: 815 [2022-12-14 11:34:28,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:34:28,268 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 672 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:28,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 53 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:34:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-12-14 11:34:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 615. [2022-12-14 11:34:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 594 states have (on average 3.5505050505050506) internal successors, (2109), 614 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:28,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2109 transitions. [2022-12-14 11:34:28,282 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2109 transitions. Word has length 7 [2022-12-14 11:34:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:28,282 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2109 transitions. [2022-12-14 11:34:28,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2109 transitions. [2022-12-14 11:34:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:34:28,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:28,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:28,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:28,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:28,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:28,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:28,886 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1235394232, now seen corresponding path program 1 times [2022-12-14 11:34:28,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:28,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501321389] [2022-12-14 11:34:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:28,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:34:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:28,891 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:28,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:29,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:34:29,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:29,164 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-12-14 11:34:29,164 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 11:34:29,185 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 11:34:29,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:29,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:29,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501321389] [2022-12-14 11:34:29,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501321389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:29,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:29,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:34:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926461616] [2022-12-14 11:34:29,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:29,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:29,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:34:29,187 INFO L87 Difference]: Start difference. First operand 615 states and 2109 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 11:34:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:29,284 INFO L93 Difference]: Finished difference Result 567 states and 1957 transitions. [2022-12-14 11:34:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:29,284 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 11:34:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:29,288 INFO L225 Difference]: With dead ends: 567 [2022-12-14 11:34:29,288 INFO L226 Difference]: Without dead ends: 567 [2022-12-14 11:34:29,288 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 11:34:29,288 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 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 11:34:29,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-12-14 11:34:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-12-14 11:34:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 552 states have (on average 3.545289855072464) internal successors, (1957), 566 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1957 transitions. [2022-12-14 11:34:29,302 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1957 transitions. Word has length 7 [2022-12-14 11:34:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:29,302 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1957 transitions. [2022-12-14 11:34:29,302 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 11:34:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1957 transitions. [2022-12-14 11:34:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:34:29,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:29,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:29,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:29,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:29,504 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1235394231, now seen corresponding path program 1 times [2022-12-14 11:34:29,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:29,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533402085] [2022-12-14 11:34:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:29,507 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 11:34:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:29,510 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:29,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:34:29,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:29,752 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:29,752 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 11:34:29,917 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 11:34:29,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:30,126 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 11:34:30,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:30,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533402085] [2022-12-14 11:34:30,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533402085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:30,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368362667] [2022-12-14 11:34:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:30,127 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:30,128 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:30,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 11:34:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:30,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:34:30,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:30,388 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 11:34:30,388 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 11:34:30,467 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 11:34:30,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:30,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368362667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:30,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:34:30,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 11:34:30,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932979267] [2022-12-14 11:34:30,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:30,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:30,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:30,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:34:30,468 INFO L87 Difference]: Start difference. First operand 567 states and 1957 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 11:34:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:30,568 INFO L93 Difference]: Finished difference Result 519 states and 1805 transitions. [2022-12-14 11:34:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:30,568 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 11:34:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:30,570 INFO L225 Difference]: With dead ends: 519 [2022-12-14 11:34:30,570 INFO L226 Difference]: Without dead ends: 519 [2022-12-14 11:34:30,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:34:30,570 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:30,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:34:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-12-14 11:34:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-12-14 11:34:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 510 states have (on average 3.5392156862745097) internal successors, (1805), 518 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1805 transitions. [2022-12-14 11:34:30,580 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1805 transitions. Word has length 7 [2022-12-14 11:34:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:30,580 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 1805 transitions. [2022-12-14 11:34:30,580 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 11:34:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1805 transitions. [2022-12-14 11:34:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:34:30,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:30,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:30,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:30,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 11:34:30,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:30,982 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:30,983 INFO L85 PathProgramCache]: Analyzing trace with hash 357479555, now seen corresponding path program 1 times [2022-12-14 11:34:30,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:30,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792339361] [2022-12-14 11:34:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:30,985 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 11:34:30,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:30,987 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:30,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 11:34:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:34:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:31,123 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 11:34:31,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:31,291 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 25 treesize of output 21 [2022-12-14 11:34:31,352 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 11:34:31,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:31,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792339361] [2022-12-14 11:34:31,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792339361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:31,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2001646459] [2022-12-14 11:34:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:31,353 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:31,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:31,353 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:31,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-12-14 11:34:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:31,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:34:31,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:31,606 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 11:34:31,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:31,832 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 11:34:31,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2001646459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:31,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668192834] [2022-12-14 11:34:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:31,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:31,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:31,834 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:31,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 11:34:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:31,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:34:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:31,984 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:31,984 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 11:34:32,218 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 11:34:32,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:32,516 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 11:34:32,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668192834] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:32,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:34:32,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 22 [2022-12-14 11:34:32,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686892973] [2022-12-14 11:34:32,516 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:32,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:34:32,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:32,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:34:32,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:34:32,518 INFO L87 Difference]: Start difference. First operand 519 states and 1805 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:35,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:35,954 INFO L93 Difference]: Finished difference Result 1306 states and 4520 transitions. [2022-12-14 11:34:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 11:34:35,955 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 11:34:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:35,961 INFO L225 Difference]: With dead ends: 1306 [2022-12-14 11:34:35,961 INFO L226 Difference]: Without dead ends: 1306 [2022-12-14 11:34:35,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:34:35,962 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 704 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:35,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 51 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 11:34:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-12-14 11:34:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 615. [2022-12-14 11:34:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 606 states have (on average 3.6056105610561056) internal successors, (2185), 614 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2185 transitions. [2022-12-14 11:34:35,974 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2185 transitions. Word has length 8 [2022-12-14 11:34:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:35,974 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2185 transitions. [2022-12-14 11:34:35,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2185 transitions. [2022-12-14 11:34:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 11:34:35,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:35,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:35,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-12-14 11:34:36,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 11:34:36,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 11:34:36,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:36,578 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash -54231694, now seen corresponding path program 1 times [2022-12-14 11:34:36,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:36,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236832052] [2022-12-14 11:34:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:36,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:34:36,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:36,583 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:36,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 11:34:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:34:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:36,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:36,779 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 11:34:36,950 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 11:34:36,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:37,629 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 11:34:37,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:37,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236832052] [2022-12-14 11:34:37,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236832052] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:37,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1855317256] [2022-12-14 11:34:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:37,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:37,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:37,630 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:37,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 11:34:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:37,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:34:37,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:37,869 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:37,869 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 11:34:38,168 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 11:34:38,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:38,584 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 11:34:38,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1855317256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:38,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209254470] [2022-12-14 11:34:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:38,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:38,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:38,585 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:38,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 11:34:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:38,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:34:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:38,766 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:38,766 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 11:34:38,873 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 11:34:38,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:39,109 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 11:34:39,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209254470] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:39,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:34:39,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-12-14 11:34:39,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44749435] [2022-12-14 11:34:39,111 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:39,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:34:39,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:34:39,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:34:39,112 INFO L87 Difference]: Start difference. First operand 615 states and 2185 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:44,919 INFO L93 Difference]: Finished difference Result 1360 states and 4946 transitions. [2022-12-14 11:34:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:34:44,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 11:34:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:44,925 INFO L225 Difference]: With dead ends: 1360 [2022-12-14 11:34:44,925 INFO L226 Difference]: Without dead ends: 1360 [2022-12-14 11:34:44,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:34:44,926 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 299 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:44,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 49 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 11:34:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2022-12-14 11:34:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 962. [2022-12-14 11:34:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 953 states have (on average 3.708289611752361) internal successors, (3534), 961 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 3534 transitions. [2022-12-14 11:34:44,946 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 3534 transitions. Word has length 10 [2022-12-14 11:34:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:44,947 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 3534 transitions. [2022-12-14 11:34:44,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 3534 transitions. [2022-12-14 11:34:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 11:34:44,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:44,947 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:44,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 11:34:45,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:45,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 11:34:45,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:45,550 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1112338637, now seen corresponding path program 1 times [2022-12-14 11:34:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:45,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221883661] [2022-12-14 11:34:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:45,552 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 11:34:45,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:45,553 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:34:45,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 11:34:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:45,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:34:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:45,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:46,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-12-14 11:34:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:46,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221883661] [2022-12-14 11:34:46,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221883661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [612279369] [2022-12-14 11:34:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:46,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:46,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:46,207 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:46,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 11:34:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:46,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:34:46,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:46,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:47,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [612279369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:47,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196463766] [2022-12-14 11:34:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:47,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:47,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:47,181 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:47,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 11:34:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:34:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:47,362 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:47,363 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 11:34:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:47,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:48,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196463766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:48,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:34:48,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 33 [2022-12-14 11:34:48,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974129318] [2022-12-14 11:34:48,376 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 11:34:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:48,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 11:34:48,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:34:48,377 INFO L87 Difference]: Start difference. First operand 962 states and 3534 transitions. Second operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:59,508 INFO L93 Difference]: Finished difference Result 3214 states and 11520 transitions. [2022-12-14 11:34:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 11:34:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 11:34:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:59,518 INFO L225 Difference]: With dead ends: 3214 [2022-12-14 11:34:59,518 INFO L226 Difference]: Without dead ends: 3214 [2022-12-14 11:34:59,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=753, Invalid=3537, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 11:34:59,519 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1947 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:59,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1947 Valid, 146 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 11:34:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2022-12-14 11:34:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 1421. [2022-12-14 11:34:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1412 states have (on average 3.9242209631728047) internal successors, (5541), 1420 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 5541 transitions. [2022-12-14 11:34:59,554 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 5541 transitions. Word has length 10 [2022-12-14 11:34:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:59,555 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 5541 transitions. [2022-12-14 11:34:59,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:59,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 5541 transitions. [2022-12-14 11:34:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:34:59,556 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:59,556 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-14 11:34:59,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:59,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-14 11:34:59,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-14 11:35:00,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:00,158 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:35:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1047822691, now seen corresponding path program 2 times [2022-12-14 11:35:00,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:35:00,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878340351] [2022-12-14 11:35:00,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:00,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:35:00,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:35:00,168 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:35:00,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 11:35:00,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:00,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:00,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:35:00,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:00,390 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:00,390 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 11:35:00,677 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 11:35:00,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:01,964 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 11:35:01,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:35:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878340351] [2022-12-14 11:35:01,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878340351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [946750951] [2022-12-14 11:35:01,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:35:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:35:01,965 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:35:01,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-12-14 11:35:02,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:02,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:02,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:35:02,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:02,274 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:02,274 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 11:35:02,306 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 13 treesize of output 9 [2022-12-14 11:35:02,586 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 11:35:02,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:03,384 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 11:35:03,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [946750951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:03,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706860176] [2022-12-14 11:35:03,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:03,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:03,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:03,386 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:03,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 11:35:03,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:35:03,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:03,740 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 11:35:03,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:04,058 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 11:35:04,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706860176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:04,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:35:04,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-12-14 11:35:04,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734999393] [2022-12-14 11:35:04,059 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:04,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 11:35:04,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:35:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 11:35:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:35:04,061 INFO L87 Difference]: Start difference. First operand 1421 states and 5541 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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 11:35:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:20,734 INFO L93 Difference]: Finished difference Result 2644 states and 9576 transitions. [2022-12-14 11:35:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 11:35:20,735 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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 11 [2022-12-14 11:35:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:20,745 INFO L225 Difference]: With dead ends: 2644 [2022-12-14 11:35:20,745 INFO L226 Difference]: Without dead ends: 2644 [2022-12-14 11:35:20,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=851, Invalid=2689, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 11:35:20,746 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1145 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:20,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 330 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-12-14 11:35:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2022-12-14 11:35:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1548. [2022-12-14 11:35:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1539 states have (on average 3.8382066276803117) internal successors, (5907), 1547 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5907 transitions. [2022-12-14 11:35:20,783 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5907 transitions. Word has length 11 [2022-12-14 11:35:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:20,783 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 5907 transitions. [2022-12-14 11:35:20,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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 11:35:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5907 transitions. [2022-12-14 11:35:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:35:20,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:20,784 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:20,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-12-14 11:35:21,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 11:35:21,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-12-14 11:35:21,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:35:21,386 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:35:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash -576914638, now seen corresponding path program 1 times [2022-12-14 11:35:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:35:21,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079915806] [2022-12-14 11:35:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:21,389 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 11:35:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:35:21,390 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:35:21,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-12-14 11:35:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:21,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:35:21,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:21,666 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:21,666 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 11:35:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:21,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:21,960 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 11:35:21,979 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 11:35:21,983 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:35:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:22,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:35:22,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079915806] [2022-12-14 11:35:22,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079915806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:22,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [597388577] [2022-12-14 11:35:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:22,459 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:35:22,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:35:22,460 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:35:22,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-12-14 11:35:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:22,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:35:22,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:22,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:23,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [597388577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:23,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213270876] [2022-12-14 11:35:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:23,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:23,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:23,459 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:23,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 11:35:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:23,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:35:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:23,671 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:23,671 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 11:35:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:24,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:24,067 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 11:35:24,082 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 11:35:24,085 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:35:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:24,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213270876] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:24,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:35:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 28 [2022-12-14 11:35:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450907871] [2022-12-14 11:35:24,653 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:24,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 11:35:24,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:35:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 11:35:24,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-12-14 11:35:24,654 INFO L87 Difference]: Start difference. First operand 1548 states and 5907 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:28,234 INFO L93 Difference]: Finished difference Result 1558 states and 5867 transitions. [2022-12-14 11:35:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:35:28,235 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 11:35:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:28,239 INFO L225 Difference]: With dead ends: 1558 [2022-12-14 11:35:28,239 INFO L226 Difference]: Without dead ends: 1558 [2022-12-14 11:35:28,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:35:28,240 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 271 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:28,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 79 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 11:35:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-12-14 11:35:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1538. [2022-12-14 11:35:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1529 states have (on average 3.817527795945062) internal successors, (5837), 1537 states have internal predecessors, (5837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5837 transitions. [2022-12-14 11:35:28,268 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5837 transitions. Word has length 12 [2022-12-14 11:35:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:28,268 INFO L495 AbstractCegarLoop]: Abstraction has 1538 states and 5837 transitions. [2022-12-14 11:35:28,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5837 transitions. [2022-12-14 11:35:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:35:28,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:28,268 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:28,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-12-14 11:35:28,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 11:35:28,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 11:35:28,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:28,871 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:35:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:28,872 INFO L85 PathProgramCache]: Analyzing trace with hash -327856257, now seen corresponding path program 2 times [2022-12-14 11:35:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:35:28,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845216575] [2022-12-14 11:35:28,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:28,873 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 11:35:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:35:28,876 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:35:28,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-12-14 11:35:29,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:29,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:29,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:35:29,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:29,107 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:29,108 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 11:35:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:29,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:30,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:35:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845216575] [2022-12-14 11:35:30,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845216575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948319013] [2022-12-14 11:35:30,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:30,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:35:30,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:35:30,880 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:35:30,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-12-14 11:35:31,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:35:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:31,254 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:31,254 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 11:35:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:31,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:31,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [948319013] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:31,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554143531] [2022-12-14 11:35:31,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:31,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:31,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:31,869 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:31,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 11:35:32,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:32,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:32,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:35:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:32,137 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:32,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:35:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:32,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:34,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554143531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:34,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:35:34,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2022-12-14 11:35:34,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217107796] [2022-12-14 11:35:34,358 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:34,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 11:35:34,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:35:34,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 11:35:34,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:35:34,359 INFO L87 Difference]: Start difference. First operand 1538 states and 5837 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:52,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:52,754 INFO L93 Difference]: Finished difference Result 2462 states and 9602 transitions. [2022-12-14 11:35:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:35:52,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 11:35:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:52,763 INFO L225 Difference]: With dead ends: 2462 [2022-12-14 11:35:52,764 INFO L226 Difference]: Without dead ends: 2462 [2022-12-14 11:35:52,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:35:52,764 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 564 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:52,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 107 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 11:35:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-12-14 11:35:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1928. [2022-12-14 11:35:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1919 states have (on average 4.025534132360605) internal successors, (7725), 1927 states have internal predecessors, (7725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 7725 transitions. [2022-12-14 11:35:52,804 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 7725 transitions. Word has length 12 [2022-12-14 11:35:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:52,805 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 7725 transitions. [2022-12-14 11:35:52,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 7725 transitions. [2022-12-14 11:35:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:35:52,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:52,805 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:52,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-12-14 11:35:53,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-12-14 11:35:53,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 11:35:53,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:53,407 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:35:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1476084227, now seen corresponding path program 2 times [2022-12-14 11:35:53,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:35:53,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765269417] [2022-12-14 11:35:53,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:53,410 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 11:35:53,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:35:53,413 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:35:53,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 11:35:53,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:53,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:35:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:53,690 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:35:53,690 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 42 [2022-12-14 11:35:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:53,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:54,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:35:54,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765269417] [2022-12-14 11:35:54,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765269417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:54,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1996957126] [2022-12-14 11:35:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:54,706 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:35:54,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:35:54,707 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:35:54,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 11:35:54,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:35:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:55,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:56,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1996957126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576136565] [2022-12-14 11:35:56,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:35:56,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:56,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:56,400 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:56,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 11:35:56,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:35:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:35:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:56,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:56,635 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 11:35:57,294 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 11:35:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:57,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:57,459 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 11:35:57,480 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 11:35:57,488 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:35:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:59,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576136565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:59,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:35:59,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 48 [2022-12-14 11:35:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357172038] [2022-12-14 11:35:59,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:59,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 11:35:59,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:35:59,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 11:35:59,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 11:35:59,994 INFO L87 Difference]: Start difference. First operand 1928 states and 7725 transitions. Second operand has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:16,672 INFO L93 Difference]: Finished difference Result 3464 states and 12996 transitions. [2022-12-14 11:36:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 11:36:16,673 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 11:36:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:16,682 INFO L225 Difference]: With dead ends: 3464 [2022-12-14 11:36:16,682 INFO L226 Difference]: Without dead ends: 3464 [2022-12-14 11:36:16,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=889, Invalid=5117, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 11:36:16,683 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2070 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 4495 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 4531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:16,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2070 Valid, 375 Invalid, 4531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4495 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-12-14 11:36:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2022-12-14 11:36:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2366. [2022-12-14 11:36:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2357 states have (on average 4.165040305473059) internal successors, (9817), 2365 states have internal predecessors, (9817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 9817 transitions. [2022-12-14 11:36:16,729 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 9817 transitions. Word has length 12 [2022-12-14 11:36:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:16,730 INFO L495 AbstractCegarLoop]: Abstraction has 2366 states and 9817 transitions. [2022-12-14 11:36:16,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 9817 transitions. [2022-12-14 11:36:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:36:16,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:16,731 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 11:36:16,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 11:36:16,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-12-14 11:36:17,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 11:36:17,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:17,334 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:36:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:17,335 INFO L85 PathProgramCache]: Analyzing trace with hash -605885474, now seen corresponding path program 3 times [2022-12-14 11:36:17,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:36:17,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342989493] [2022-12-14 11:36:17,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:17,335 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 11:36:17,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:36:17,336 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:36:17,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 11:36:17,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:36:17,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:17,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:36:17,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:17,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:36:17,717 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 11:36:18,041 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 11:36:18,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:20,682 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 11:36:20,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:36:20,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342989493] [2022-12-14 11:36:20,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342989493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:20,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1463996629] [2022-12-14 11:36:20,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:20,683 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:36:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:36:20,683 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:36:20,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-12-14 11:36:21,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:36:21,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:36:21,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:21,380 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:36:21,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:36:21,559 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 11:36:21,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:24,567 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 11:36:24,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1463996629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246227520] [2022-12-14 11:36:24,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:24,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:24,568 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:24,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 11:36:27,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:36:27,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:27,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:36:27,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:27,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:36:27,896 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 11:36:28,049 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 11:36:28,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:32,376 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 11:36:32,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246227520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:32,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:36:32,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-12-14 11:36:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419292393] [2022-12-14 11:36:32,377 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:32,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 11:36:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:36:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 11:36:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 11:36:32,378 INFO L87 Difference]: Start difference. First operand 2366 states and 9817 transitions. Second operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 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 11:36:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:53,572 INFO L93 Difference]: Finished difference Result 13450 states and 55062 transitions. [2022-12-14 11:36:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:36:53,573 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 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 12 [2022-12-14 11:36:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:53,615 INFO L225 Difference]: With dead ends: 13450 [2022-12-14 11:36:53,615 INFO L226 Difference]: Without dead ends: 13450 [2022-12-14 11:36:53,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=857, Invalid=2005, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 11:36:53,616 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5224 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5224 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 3328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:53,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5224 Valid, 441 Invalid, 3328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-12-14 11:36:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13450 states. [2022-12-14 11:36:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13450 to 2378. [2022-12-14 11:36:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2369 states have (on average 4.154073448712537) internal successors, (9841), 2377 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 9841 transitions. [2022-12-14 11:36:53,761 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 9841 transitions. Word has length 12 [2022-12-14 11:36:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:53,761 INFO L495 AbstractCegarLoop]: Abstraction has 2378 states and 9841 transitions. [2022-12-14 11:36:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 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 11:36:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 9841 transitions. [2022-12-14 11:36:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:36:53,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:53,762 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-12-14 11:36:53,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-14 11:36:53,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-12-14 11:36:54,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-12-14 11:36:54,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:36:54,365 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:36:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:54,366 INFO L85 PathProgramCache]: Analyzing trace with hash 880547519, now seen corresponding path program 3 times [2022-12-14 11:36:54,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:36:54,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902278239] [2022-12-14 11:36:54,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:54,367 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 11:36:54,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:36:54,369 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:36:54,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-12-14 11:36:54,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:36:54,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:36:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:54,790 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:36:54,790 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 11:36:55,110 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 11:36:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:55,400 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 11:36:57,625 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 11:36:57,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:36:57,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902278239] [2022-12-14 11:36:57,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902278239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:57,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [789239890] [2022-12-14 11:36:57,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:36:57,626 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:36:57,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:36:57,627 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:36:57,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-12-14 11:36:58,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:36:58,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:58,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:36:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:58,403 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:36:58,403 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 11:36:59,089 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 11:36:59,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:59,132 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 11:36:59,160 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 11:36:59,164 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:37:02,767 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 11:37:02,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [789239890] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:02,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278988933] [2022-12-14 11:37:02,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:37:02,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:02,768 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:02,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 11:37:03,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:37:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:37:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:04,310 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 11:37:04,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:05,935 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 11:37:05,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278988933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:05,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:37:05,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 10, 10] total 56 [2022-12-14 11:37:05,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485005743] [2022-12-14 11:37:05,936 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:05,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 11:37:05,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:37:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 11:37:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2872, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 11:37:05,939 INFO L87 Difference]: Start difference. First operand 2378 states and 9841 transitions. Second operand has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:14,858 INFO L93 Difference]: Finished difference Result 5518 states and 22047 transitions. [2022-12-14 11:38:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 11:38:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 11:38:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:14,875 INFO L225 Difference]: With dead ends: 5518 [2022-12-14 11:38:14,875 INFO L226 Difference]: Without dead ends: 5518 [2022-12-14 11:38:14,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=1440, Invalid=9066, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 11:38:14,877 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2397 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 6154 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 6213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 6154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:14,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2397 Valid, 946 Invalid, 6213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 6154 Invalid, 0 Unknown, 0 Unchecked, 24.5s Time] [2022-12-14 11:38:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5518 states. [2022-12-14 11:38:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5518 to 2942. [2022-12-14 11:38:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2933 states have (on average 4.154108421411524) internal successors, (12184), 2941 states have internal predecessors, (12184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 12184 transitions. [2022-12-14 11:38:14,964 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 12184 transitions. Word has length 13 [2022-12-14 11:38:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:14,964 INFO L495 AbstractCegarLoop]: Abstraction has 2942 states and 12184 transitions. [2022-12-14 11:38:14,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 12184 transitions. [2022-12-14 11:38:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:38:14,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:14,970 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:14,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-12-14 11:38:15,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-14 11:38:15,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-12-14 11:38:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:38:15,572 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:38:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 484602707, now seen corresponding path program 2 times [2022-12-14 11:38:15,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:38:15,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771345829] [2022-12-14 11:38:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:38:15,576 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 11:38:15,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:38:15,578 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:38:15,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-12-14 11:38:15,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 11:38:15,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:38:15,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:15,942 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:38:15,942 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 11:38:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:38:16,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:38:16,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:38:16,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771345829] [2022-12-14 11:38:16,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771345829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:38:16,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:38:16,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:38:16,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112182933] [2022-12-14 11:38:16,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:38:16,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:38:16,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:38:16,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:38:16,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:38:16,131 INFO L87 Difference]: Start difference. First operand 2942 states and 12184 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:16,424 INFO L93 Difference]: Finished difference Result 3154 states and 12678 transitions. [2022-12-14 11:38:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:38:16,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 11:38:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:16,434 INFO L225 Difference]: With dead ends: 3154 [2022-12-14 11:38:16,434 INFO L226 Difference]: Without dead ends: 3154 [2022-12-14 11:38:16,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:38:16,435 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:16,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:38:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2022-12-14 11:38:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3140. [2022-12-14 11:38:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3131 states have (on average 4.0415202810603645) internal successors, (12654), 3139 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 12654 transitions. [2022-12-14 11:38:16,508 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 12654 transitions. Word has length 13 [2022-12-14 11:38:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:16,508 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 12654 transitions. [2022-12-14 11:38:16,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 12654 transitions. [2022-12-14 11:38:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 11:38:16,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:16,509 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:16,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-12-14 11:38:16,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:38:16,711 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:38:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1888727890, now seen corresponding path program 3 times [2022-12-14 11:38:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:38:16,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220776426] [2022-12-14 11:38:16,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:38:16,715 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 11:38:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:38:16,718 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:38:16,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-14 11:38:16,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:38:16,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:38:16,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:17,024 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:38:17,025 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 11:38:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:38:17,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:38:18,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:38:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220776426] [2022-12-14 11:38:18,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220776426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [943704835] [2022-12-14 11:38:18,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:38:18,560 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:38:18,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:38:18,560 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:38:18,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 11:38:18,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:38:18,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:18,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:38:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:18,974 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:38:18,974 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 11:38:19,319 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 11:38:19,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-12-14 11:38:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:38:19,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:19,900 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 11:38:19,943 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:38:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:38:22,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [943704835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632822984] [2022-12-14 11:38:22,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:38:22,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:22,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:22,242 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:22,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 11:38:22,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:38:22,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:22,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:38:22,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:22,658 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:38:22,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 11:38:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:38:22,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:38:25,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632822984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:25,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:38:25,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-12-14 11:38:25,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704544642] [2022-12-14 11:38:25,183 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:38:25,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 11:38:25,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:38:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 11:38:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:38:25,184 INFO L87 Difference]: Start difference. First operand 3140 states and 12654 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 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 11:38:28,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:38:30,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:38:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:31,041 INFO L93 Difference]: Finished difference Result 3422 states and 13692 transitions. [2022-12-14 11:38:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:38:31,042 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 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 14 [2022-12-14 11:38:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:31,050 INFO L225 Difference]: With dead ends: 3422 [2022-12-14 11:38:31,050 INFO L226 Difference]: Without dead ends: 3422 [2022-12-14 11:38:31,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-12-14 11:38:31,050 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 339 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:31,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 32 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 270 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-12-14 11:38:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2022-12-14 11:38:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2112. [2022-12-14 11:38:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2107 states have (on average 3.9155196962505934) internal successors, (8250), 2111 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:38:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 8250 transitions. [2022-12-14 11:38:31,087 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 8250 transitions. Word has length 14 [2022-12-14 11:38:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:31,087 INFO L495 AbstractCegarLoop]: Abstraction has 2112 states and 8250 transitions. [2022-12-14 11:38:31,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 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 11:38:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 8250 transitions. [2022-12-14 11:38:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 11:38:31,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:31,088 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:31,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-12-14 11:38:31,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 11:38:31,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-12-14 11:38:31,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:38:31,690 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:38:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1976306637, now seen corresponding path program 3 times [2022-12-14 11:38:31,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:38:31,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173555196] [2022-12-14 11:38:31,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:38:31,693 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 11:38:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:38:31,696 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:38:31,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 11:38:31,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:38:31,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:31,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:38:31,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:31,975 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:38:31,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 11:38:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:32,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:33,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:38:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173555196] [2022-12-14 11:38:33,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173555196] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1009904685] [2022-12-14 11:38:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:38:33,372 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:38:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:38:33,373 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:38:33,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 11:38:33,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:38:33,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:38:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:34,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:36,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1009904685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132636166] [2022-12-14 11:38:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:38:36,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:36,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:36,018 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:36,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 11:38:36,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:38:36,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:38:36,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:36,338 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:38:36,339 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 11:38:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:37,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:38:39,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132636166] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:39,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:38:39,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 10, 10] total 56 [2022-12-14 11:38:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449342123] [2022-12-14 11:38:39,114 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:38:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 11:38:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:38:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 11:38:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3041, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 11:38:39,116 INFO L87 Difference]: Start difference. First operand 2112 states and 8250 transitions. Second operand has 58 states, 57 states have (on average 1.3333333333333333) 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 11:39:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:01,955 INFO L93 Difference]: Finished difference Result 4284 states and 15126 transitions. [2022-12-14 11:39:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 11:39:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.3333333333333333) 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 11:39:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:01,964 INFO L225 Difference]: With dead ends: 4284 [2022-12-14 11:39:01,964 INFO L226 Difference]: Without dead ends: 4284 [2022-12-14 11:39:01,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1289, Invalid=8023, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 11:39:01,966 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3144 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 8110 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3144 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 8173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 8110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:01,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3144 Valid, 671 Invalid, 8173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 8110 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2022-12-14 11:39:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2022-12-14 11:39:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 2610. [2022-12-14 11:39:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2605 states have (on average 4.060652591170825) internal successors, (10578), 2609 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 10578 transitions. [2022-12-14 11:39:02,011 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 10578 transitions. Word has length 14 [2022-12-14 11:39:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:02,011 INFO L495 AbstractCegarLoop]: Abstraction has 2610 states and 10578 transitions. [2022-12-14 11:39:02,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.3333333333333333) 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 11:39:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 10578 transitions. [2022-12-14 11:39:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 11:39:02,014 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:02,014 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2022-12-14 11:39:02,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 11:39:02,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-12-14 11:39:02,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 11:39:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:02,616 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:39:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:02,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1485313693, now seen corresponding path program 4 times [2022-12-14 11:39:02,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386658311] [2022-12-14 11:39:02,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:39:02,619 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 11:39:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:02,622 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:02,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-14 11:39:02,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:39:02,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 11:39:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:02,889 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:39:02,889 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 11:39:03,313 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 11:39:03,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:06,428 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 11:39:06,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:06,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386658311] [2022-12-14 11:39:06,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386658311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:06,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1880208122] [2022-12-14 11:39:06,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:39:06,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:39:06,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:39:06,429 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:39:06,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-12-14 11:39:06,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:39:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:06,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:39:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:07,539 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 11:39:07,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:09,308 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 11:39:09,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1880208122] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:09,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675651179] [2022-12-14 11:39:09,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:39:09,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:09,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:09,309 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:09,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 11:39:09,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:39:09,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:09,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:39:09,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:09,897 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 11:39:09,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:09,969 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 11:39:09,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675651179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:09,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:39:09,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12, 12, 12, 12] total 52 [2022-12-14 11:39:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255636273] [2022-12-14 11:39:09,970 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:39:09,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 11:39:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 11:39:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=2253, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 11:39:09,971 INFO L87 Difference]: Start difference. First operand 2610 states and 10578 transitions. Second operand has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:51,512 INFO L93 Difference]: Finished difference Result 4861 states and 18829 transitions. [2022-12-14 11:39:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 11:39:51,513 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 11:39:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:51,523 INFO L225 Difference]: With dead ends: 4861 [2022-12-14 11:39:51,524 INFO L226 Difference]: Without dead ends: 4861 [2022-12-14 11:39:51,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=1872, Invalid=7248, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 11:39:51,525 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2122 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 5116 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2122 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 5167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:51,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2122 Valid, 895 Invalid, 5167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5116 Invalid, 0 Unknown, 0 Unchecked, 20.9s Time] [2022-12-14 11:39:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2022-12-14 11:39:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3145. [2022-12-14 11:39:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3140 states have (on average 4.176114649681528) internal successors, (13113), 3144 states have internal predecessors, (13113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 13113 transitions. [2022-12-14 11:39:51,585 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 13113 transitions. Word has length 15 [2022-12-14 11:39:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:51,585 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 13113 transitions. [2022-12-14 11:39:51,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 13113 transitions. [2022-12-14 11:39:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 11:39:51,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:51,587 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-14 11:39:51,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-12-14 11:39:51,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-12-14 11:39:52,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-14 11:39:52,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:52,189 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:39:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:52,190 INFO L85 PathProgramCache]: Analyzing trace with hash 6054559, now seen corresponding path program 5 times [2022-12-14 11:39:52,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:52,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014671319] [2022-12-14 11:39:52,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:39:52,192 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 11:39:52,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:52,194 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:39:52,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-12-14 11:39:52,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:39:52,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 11:39:52,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:52,539 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:39:52,539 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 11:39:52,909 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 11:39:52,992 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 11:39:52,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:53,287 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 11:39:53,329 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 11:39:53,334 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:39:56,742 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 11:39:56,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:56,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014671319] [2022-12-14 11:39:56,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014671319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [619710552] [2022-12-14 11:39:56,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:39:56,743 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:39:56,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:39:56,743 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:39:56,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-12-14 11:39:57,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:39:57,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:39:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:58,528 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 11:39:58,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:00,771 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 11:40:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [619710552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698347700] [2022-12-14 11:40:00,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:40:00,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:00,772 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:00,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 11:40:01,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:40:01,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:40:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:03,075 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 11:40:03,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:04,529 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 11:40:04,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698347700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:04,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:40:04,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-12-14 11:40:04,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350341965] [2022-12-14 11:40:04,530 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:04,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 11:40:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 11:40:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=4360, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 11:40:04,531 INFO L87 Difference]: Start difference. First operand 3145 states and 13113 transitions. Second operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:48,355 INFO L93 Difference]: Finished difference Result 4803 states and 18161 transitions. [2022-12-14 11:40:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 11:40:48,356 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 11:40:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:48,370 INFO L225 Difference]: With dead ends: 4803 [2022-12-14 11:40:48,370 INFO L226 Difference]: Without dead ends: 4803 [2022-12-14 11:40:48,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=2324, Invalid=12438, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 11:40:48,372 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2525 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 9487 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2525 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 9565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 9487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:48,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2525 Valid, 1712 Invalid, 9565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 9487 Invalid, 0 Unknown, 0 Unchecked, 20.2s Time] [2022-12-14 11:40:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2022-12-14 11:40:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2765. [2022-12-14 11:40:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2760 states have (on average 3.892391304347826) internal successors, (10743), 2764 states have internal predecessors, (10743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 10743 transitions. [2022-12-14 11:40:48,447 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 10743 transitions. Word has length 15 [2022-12-14 11:40:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:48,447 INFO L495 AbstractCegarLoop]: Abstraction has 2765 states and 10743 transitions. [2022-12-14 11:40:48,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 10743 transitions. [2022-12-14 11:40:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 11:40:48,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:48,450 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:48,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-12-14 11:40:48,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-12-14 11:40:48,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-14 11:40:49,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:49,053 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash -161652861, now seen corresponding path program 4 times [2022-12-14 11:40:49,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:49,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829134892] [2022-12-14 11:40:49,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:40:49,055 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 11:40:49,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:49,056 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:40:49,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-12-14 11:40:49,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:40:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:49,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:40:49,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:49,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:50,372 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 11:40:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:51,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829134892] [2022-12-14 11:40:51,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829134892] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1885634043] [2022-12-14 11:40:51,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:40:51,210 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:51,211 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:51,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-12-14 11:40:51,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:40:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:40:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:52,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:54,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1885634043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822159976] [2022-12-14 11:40:54,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:40:54,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:54,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:54,900 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:54,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-14 11:40:55,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:40:55,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:55,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 11:40:55,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:55,151 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:40:55,152 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 11:40:56,607 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 11:40:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:56,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:56,819 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 11:40:56,833 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 11:40:56,846 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:41:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:02,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822159976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:02,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:41:02,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 71 [2022-12-14 11:41:02,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934666567] [2022-12-14 11:41:02,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:41:02,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 11:41:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 11:41:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=4870, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 11:41:02,669 INFO L87 Difference]: Start difference. First operand 2765 states and 10743 transitions. Second operand has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:43:03,265 INFO L93 Difference]: Finished difference Result 15045 states and 53965 transitions. [2022-12-14 11:43:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-12-14 11:43:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have 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 11:43:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:43:03,298 INFO L225 Difference]: With dead ends: 15045 [2022-12-14 11:43:03,299 INFO L226 Difference]: Without dead ends: 15045 [2022-12-14 11:43:03,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9286 ImplicationChecksByTransitivity, 86.8s TimeCoverageRelationStatistics Valid=4301, Invalid=29005, Unknown=0, NotChecked=0, Total=33306 [2022-12-14 11:43:03,302 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9009 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 14306 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9009 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 14504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 14306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:43:03,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9009 Valid, 1199 Invalid, 14504 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [198 Valid, 14306 Invalid, 0 Unknown, 0 Unchecked, 44.7s Time] [2022-12-14 11:43:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15045 states. [2022-12-14 11:43:03,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15045 to 2701. [2022-12-14 11:43:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2696 states have (on average 3.904673590504451) internal successors, (10527), 2700 states have internal predecessors, (10527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 10527 transitions. [2022-12-14 11:43:03,403 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 10527 transitions. Word has length 16 [2022-12-14 11:43:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:43:03,403 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 10527 transitions. [2022-12-14 11:43:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:43:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 10527 transitions. [2022-12-14 11:43:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:43:03,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:43:03,406 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:43:03,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-12-14 11:43:03,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-14 11:43:03,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-12-14 11:43:04,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:43:04,008 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:43:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:43:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2107070157, now seen corresponding path program 5 times [2022-12-14 11:43:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:43:04,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218660258] [2022-12-14 11:43:04,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:43:04,011 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 11:43:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:43:04,014 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:43:04,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-12-14 11:43:04,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:43:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:43:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:43:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:04,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:43:05,925 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 11:43:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:06,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:43:06,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218660258] [2022-12-14 11:43:06,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218660258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:43:06,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2115931369] [2022-12-14 11:43:06,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:43:06,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:43:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:43:06,835 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:43:06,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-12-14 11:43:07,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:43:07,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:43:07,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:43:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:08,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:43:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:12,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2115931369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:43:12,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533282555] [2022-12-14 11:43:12,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:43:12,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:43:12,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:43:12,015 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:43:12,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-14 11:43:13,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 11:43:13,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:43:13,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 11:43:13,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:43:13,489 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:43:13,489 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 11:43:15,259 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 11:43:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:15,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:43:15,692 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 11:43:15,712 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 11:43:15,720 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:43:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:43:23,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533282555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:43:23,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:43:23,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 82 [2022-12-14 11:43:23,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884289939] [2022-12-14 11:43:23,497 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:43:23,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-14 11:43:23,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:43:23,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-14 11:43:23,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=6505, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 11:43:23,499 INFO L87 Difference]: Start difference. First operand 2701 states and 10527 transitions. Second operand has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:15,856 INFO L93 Difference]: Finished difference Result 19052 states and 68748 transitions. [2022-12-14 11:47:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-12-14 11:47:15,857 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 11:47:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:15,898 INFO L225 Difference]: With dead ends: 19052 [2022-12-14 11:47:15,898 INFO L226 Difference]: Without dead ends: 19052 [2022-12-14 11:47:15,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13401 ImplicationChecksByTransitivity, 164.6s TimeCoverageRelationStatistics Valid=5749, Invalid=41557, Unknown=0, NotChecked=0, Total=47306 [2022-12-14 11:47:15,900 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 12257 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 26093 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12257 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 26386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 26093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:15,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12257 Valid, 2137 Invalid, 26386 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [293 Valid, 26093 Invalid, 0 Unknown, 0 Unchecked, 82.1s Time] [2022-12-14 11:47:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19052 states. [2022-12-14 11:47:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19052 to 3988. [2022-12-14 11:47:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3983 states have (on average 4.119005774541803) internal successors, (16406), 3987 states have internal predecessors, (16406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 16406 transitions. [2022-12-14 11:47:16,060 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 16406 transitions. Word has length 18 [2022-12-14 11:47:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:16,060 INFO L495 AbstractCegarLoop]: Abstraction has 3988 states and 16406 transitions. [2022-12-14 11:47:16,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 16406 transitions. [2022-12-14 11:47:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 11:47:16,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:16,063 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:16,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-12-14 11:47:16,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-12-14 11:47:16,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-14 11:47:16,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:16,666 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:47:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash -296153853, now seen corresponding path program 6 times [2022-12-14 11:47:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:47:16,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135419050] [2022-12-14 11:47:16,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:47:16,669 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 11:47:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:47:16,671 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -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 11:47:16,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-12-14 11:47:16,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 11:47:16,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:47:16,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:47:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:17,070 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:47:17,070 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 42 [2022-12-14 11:47:17,416 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 11:47:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:17,577 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 11:47:17,595 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 11:47:17,604 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:47:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:21,972 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:47:21,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135419050] [2022-12-14 11:47:21,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135419050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:21,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800246255] [2022-12-14 11:47:21,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:47:21,973 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:47:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:47:21,973 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:47:21,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-12-14 11:47:22,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 11:47:22,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:47:22,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 11:47:22,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:22,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:47:22,884 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 11:47:24,842 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 174 treesize of output 78 [2022-12-14 11:47:24,848 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 78 treesize of output 74 [2022-12-14 11:47:24,852 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 82 treesize of output 76 [2022-12-14 11:47:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:25,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:26,068 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 11:47:26,089 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 11:47:26,100 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:47:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:32,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800246255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:32,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705266673] [2022-12-14 11:47:32,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:47:32,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:32,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:32,672 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:32,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aa4e1e2-14f2-40fc-9d8c-f2bf094b1340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-14 11:47:33,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 11:47:33,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:47:33,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:47:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:33,269 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:47:33,269 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 11:47:36,233 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 11:47:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:36,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:36,535 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 11:47:36,558 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 11:47:36,571 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 11:47:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:42,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705266673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:42,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:47:42,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 88 [2022-12-14 11:47:42,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314776417] [2022-12-14 11:47:42,699 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:42,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-14 11:47:42,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:47:42,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-14 11:47:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=7312, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 11:47:42,701 INFO L87 Difference]: Start difference. First operand 3988 states and 16406 transitions. Second operand has 90 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 89 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)