./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/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_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/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_95012ec0-5337-4884-bddf-1120a8c083d0/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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- 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 06:08:00,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:08:00,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:08:00,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:08:00,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:08:00,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:08:00,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:08:00,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:08:00,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:08:00,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:08:00,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:08:00,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:08:00,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:08:00,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:08:00,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:08:00,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:08:00,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:08:00,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:08:00,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:08:00,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:08:00,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:08:00,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:08:00,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:08:00,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:08:00,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:08:00,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:08:00,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:08:00,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:08:00,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:08:00,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:08:00,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:08:00,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:08:00,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:08:00,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:08:00,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:08:00,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:08:00,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:08:00,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:08:00,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:08:00,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:08:00,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:08:00,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 06:08:00,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:08:00,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:08:00,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:08:00,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:08:00,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:08:00,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:08:00,688 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:08:00,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:08:00,688 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:08:00,688 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:08:00,689 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:08:00,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:08:00,689 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:08:00,689 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:08:00,689 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:08:00,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:08:00,690 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:08:00,690 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:08:00,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:08:00,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:08:00,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:08:00,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:08:00,691 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:08:00,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:08:00,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:08:00,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:08:00,692 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:08:00,692 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:08:00,692 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:08:00,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:08:00,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:08:00,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:08:00,693 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:08:00,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:08:00,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:08:00,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:08:00,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:08:00,699 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:08:00,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:08:00,699 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:08:00,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:08:00,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:08:00,699 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_95012ec0-5337-4884-bddf-1120a8c083d0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2022-12-14 06:08:00,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:08:00,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:08:00,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:08:00,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:08:00,890 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:08:00,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-12-14 06:08:03,443 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:08:03,592 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:08:03,592 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-12-14 06:08:03,599 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/data/590c5347b/61012fa1ed1c4b86a2b2e8b5a2cabea8/FLAG214751b36 [2022-12-14 06:08:03,613 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/data/590c5347b/61012fa1ed1c4b86a2b2e8b5a2cabea8 [2022-12-14 06:08:03,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:08:03,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:08:03,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:08:03,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:08:03,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:08:03,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:08:03" (1/1) ... [2022-12-14 06:08:03,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8fbfc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:03, skipping insertion in model container [2022-12-14 06:08:03,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:08:03" (1/1) ... [2022-12-14 06:08:03,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:08:03,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:08:03,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,791 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,792 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,796 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,803 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,804 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,804 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,806 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:03,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:03,835 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_95012ec0-5337-4884-bddf-1120a8c083d0/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-12-14 06:08:03,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:08:03,858 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 06:08:03,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50018a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:03, skipping insertion in model container [2022-12-14 06:08:03,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:08:03,859 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 06:08:03,861 INFO L158 Benchmark]: Toolchain (without parser) took 243.64ms. Allocated memory is still 155.2MB. Free memory was 98.2MB in the beginning and 127.2MB in the end (delta: -29.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 06:08:03,862 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 111.1MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:08:03,862 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.24ms. Allocated memory is still 155.2MB. Free memory was 97.8MB in the beginning and 127.2MB in the end (delta: -29.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 06:08:03,864 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 111.1MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.24ms. Allocated memory is still 155.2MB. Free memory was 97.8MB in the beginning and 127.2MB in the end (delta: -29.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 160]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/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_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/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_95012ec0-5337-4884-bddf-1120a8c083d0/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 f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- 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 06:08:05,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:08:05,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:08:05,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:08:05,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:08:05,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:08:05,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:08:05,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:08:05,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:08:05,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:08:05,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:08:05,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:08:05,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:08:05,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:08:05,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:08:05,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:08:05,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:08:05,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:08:05,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:08:05,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:08:05,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:08:05,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:08:05,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:08:05,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:08:05,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:08:05,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:08:05,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:08:05,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:08:05,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:08:05,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:08:05,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:08:05,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:08:05,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:08:05,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:08:05,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:08:05,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:08:05,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:08:05,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:08:05,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:08:05,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:08:05,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:08:05,366 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 06:08:05,383 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:08:05,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:08:05,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:08:05,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:08:05,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:08:05,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:08:05,384 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:08:05,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:08:05,385 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:08:05,385 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:08:05,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:08:05,385 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:08:05,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:08:05,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:08:05,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:08:05,387 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:08:05,387 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:08:05,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:08:05,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:08:05,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:08:05,387 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:08:05,387 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:08:05,388 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:08:05,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:08:05,388 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:08:05,388 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 06:08:05,388 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 06:08:05,388 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:08:05,389 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:08:05,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:08:05,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 06:08:05,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:08:05,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:08:05,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:08:05,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:08:05,390 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 06:08:05,390 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 06:08:05,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:08:05,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 06:08:05,390 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_95012ec0-5337-4884-bddf-1120a8c083d0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2022-12-14 06:08:05,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:08:05,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:08:05,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:08:05,657 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:08:05,657 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:08:05,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-12-14 06:08:08,287 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:08:08,444 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:08:08,444 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2022-12-14 06:08:08,451 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/data/769ef930a/b93daf9170b648039b1148cda2486a42/FLAG3bddbf47a [2022-12-14 06:08:08,462 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/data/769ef930a/b93daf9170b648039b1148cda2486a42 [2022-12-14 06:08:08,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:08:08,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:08:08,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:08:08,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:08:08,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:08:08,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480860f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08, skipping insertion in model container [2022-12-14 06:08:08,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:08:08,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:08:08,602 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,604 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,604 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,607 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,607 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,607 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,610 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,610 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,610 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,613 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,613 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,614 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,614 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,615 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,615 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,617 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,618 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,619 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,626 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_95012ec0-5337-4884-bddf-1120a8c083d0/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-12-14 06:08:08,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:08:08,644 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 06:08:08,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:08:08,651 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,651 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,652 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,653 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,653 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,656 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,660 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,660 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,661 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,661 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,666 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_95012ec0-5337-4884-bddf-1120a8c083d0/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-12-14 06:08:08,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:08:08,673 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:08:08,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,684 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,684 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,687 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,687 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,687 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,688 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,688 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,688 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,689 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,689 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,690 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,690 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,691 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,691 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,692 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,692 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 06:08:08,692 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 06:08:08,696 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_95012ec0-5337-4884-bddf-1120a8c083d0/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4232,4245] [2022-12-14 06:08:08,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:08:08,711 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:08:08,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08 WrapperNode [2022-12-14 06:08:08,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:08:08,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:08:08,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:08:08,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:08:08,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,758 INFO L138 Inliner]: procedures = 29, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 336 [2022-12-14 06:08:08,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:08:08,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:08:08,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:08:08,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:08:08,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,805 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:08:08,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:08:08,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:08:08,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:08:08,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (1/1) ... [2022-12-14 06:08:08,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:08:08,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:08,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:08:08,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:08:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:08:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 06:08:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:08:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 06:08:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 06:08:08,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 06:08:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 06:08:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 06:08:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 06:08:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 06:08:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-14 06:08:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-14 06:08:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 06:08:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 06:08:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 06:08:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:08:08,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:08:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:08:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 06:08:08,879 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 06:08:08,987 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:08:08,989 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:08:09,637 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:08:09,802 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:08:09,802 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-14 06:08:09,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:08:09 BoogieIcfgContainer [2022-12-14 06:08:09,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:08:09,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:08:09,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:08:09,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:08:09,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:08:08" (1/3) ... [2022-12-14 06:08:09,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b433a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:08:09, skipping insertion in model container [2022-12-14 06:08:09,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:08:08" (2/3) ... [2022-12-14 06:08:09,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b433a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:08:09, skipping insertion in model container [2022-12-14 06:08:09,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:08:09" (3/3) ... [2022-12-14 06:08:09,810 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2022-12-14 06:08:09,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:08:09,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-12-14 06:08:09,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 06:08:09,899 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-14 06:08:09,935 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 06:08:09,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 288 places, 297 transitions, 626 flow [2022-12-14 06:08:09,950 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 288 places, 297 transitions, 626 flow [2022-12-14 06:08:09,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 297 transitions, 626 flow [2022-12-14 06:08:10,028 INFO L130 PetriNetUnfolder]: 22/293 cut-off events. [2022-12-14 06:08:10,028 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-14 06:08:10,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 293 events. 22/293 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 277 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 241. Up to 2 conditions per place. [2022-12-14 06:08:10,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 3860 [2022-12-14 06:08:41,923 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 139 DAG size of output: 138 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 06:08:49,858 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 142 DAG size of output: 141 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 06:08:51,647 INFO L134 LiptonReduction]: Checked pairs total: 7220 [2022-12-14 06:08:51,647 INFO L136 LiptonReduction]: Total number of compositions: 315 [2022-12-14 06:08:51,653 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 79 transitions, 190 flow [2022-12-14 06:08:52,043 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12344 states, 10950 states have (on average 5.080821917808219) internal successors, (55635), 12343 states have internal predecessors, (55635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:52,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:08:52,065 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;@3575b3b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:08:52,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-12-14 06:08:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 12344 states, 10950 states have (on average 5.080821917808219) internal successors, (55635), 12343 states have internal predecessors, (55635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 06:08:52,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:52,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 06:08:52,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:08:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:52,108 INFO L85 PathProgramCache]: Analyzing trace with hash 46922, now seen corresponding path program 1 times [2022-12-14 06:08:52,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:08:52,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780331147] [2022-12-14 06:08:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:52,121 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 06:08:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:08:52,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:52,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:52,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:08:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:52,428 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 06:08:52,429 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 06:08:52,461 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 06:08:52,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:08:52,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:08:52,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780331147] [2022-12-14 06:08:52,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780331147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:52,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:52,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:08:52,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746714805] [2022-12-14 06:08:52,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:52,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:52,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:08:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:52,507 INFO L87 Difference]: Start difference. First operand has 12344 states, 10950 states have (on average 5.080821917808219) internal successors, (55635), 12343 states have internal predecessors, (55635), 0 states have call successors, (0), 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 06:08:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:53,080 INFO L93 Difference]: Finished difference Result 9644 states and 43391 transitions. [2022-12-14 06:08:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:53,082 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 06:08:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:53,184 INFO L225 Difference]: With dead ends: 9644 [2022-12-14 06:08:53,184 INFO L226 Difference]: Without dead ends: 9644 [2022-12-14 06:08:53,185 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 06:08:53,187 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:53,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:08:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9644 states. [2022-12-14 06:08:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9644 to 9644. [2022-12-14 06:08:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9644 states, 8640 states have (on average 5.022106481481481) internal successors, (43391), 9643 states have internal predecessors, (43391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9644 states to 9644 states and 43391 transitions. [2022-12-14 06:08:53,748 INFO L78 Accepts]: Start accepts. Automaton has 9644 states and 43391 transitions. Word has length 2 [2022-12-14 06:08:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:53,748 INFO L495 AbstractCegarLoop]: Abstraction has 9644 states and 43391 transitions. [2022-12-14 06:08:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9644 states and 43391 transitions. [2022-12-14 06:08:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 06:08:53,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:53,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 06:08:53,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:53,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:53,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:08:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash 46923, now seen corresponding path program 1 times [2022-12-14 06:08:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:08:53,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032060120] [2022-12-14 06:08:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:53,954 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 06:08:53,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:08:53,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:54,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:54,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:08:54,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:54,293 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:08:54,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:08:54,325 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 06:08:54,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:08:54,326 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:08:54,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032060120] [2022-12-14 06:08:54,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032060120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:54,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:54,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:08:54,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126790565] [2022-12-14 06:08:54,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:54,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:08:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:08:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:08:54,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:08:54,328 INFO L87 Difference]: Start difference. First operand 9644 states and 43391 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 06:08:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:55,030 INFO L93 Difference]: Finished difference Result 19284 states and 86778 transitions. [2022-12-14 06:08:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:08:55,031 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 06:08:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:55,171 INFO L225 Difference]: With dead ends: 19284 [2022-12-14 06:08:55,172 INFO L226 Difference]: Without dead ends: 19284 [2022-12-14 06:08:55,172 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 06:08:55,173 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:55,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 12 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:08:55,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19284 states. [2022-12-14 06:08:55,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19284 to 9647. [2022-12-14 06:08:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9647 states, 8643 states have (on average 5.0212889043156315) internal successors, (43399), 9646 states have internal predecessors, (43399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9647 states to 9647 states and 43399 transitions. [2022-12-14 06:08:55,639 INFO L78 Accepts]: Start accepts. Automaton has 9647 states and 43399 transitions. Word has length 2 [2022-12-14 06:08:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:55,639 INFO L495 AbstractCegarLoop]: Abstraction has 9647 states and 43399 transitions. [2022-12-14 06:08:55,639 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 06:08:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 9647 states and 43399 transitions. [2022-12-14 06:08:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:08:55,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:55,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:08:55,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:55,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:55,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:08:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:55,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1459624, now seen corresponding path program 1 times [2022-12-14 06:08:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:08:55,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140705408] [2022-12-14 06:08:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:55,842 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 06:08:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:08:55,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:55,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:08:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 06:08:55,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:56,089 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:08:56,090 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:08:56,140 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 06:08:56,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:56,308 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 06:08:56,308 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:08:56,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140705408] [2022-12-14 06:08:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140705408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:56,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981368927] [2022-12-14 06:08:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:56,309 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:08:56,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:08:56,310 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:08:56,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 06:08:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:56,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 06:08:56,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:56,561 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:08:56,561 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:08:56,603 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 06:08:56,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:56,656 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 06:08:56,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1981368927] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912324037] [2022-12-14 06:08:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:56,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:56,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:08:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:08:56,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:56,853 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:08:56,853 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:08:56,887 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 06:08:56,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:56,994 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 06:08:56,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912324037] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:56,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:08:56,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 06:08:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268253333] [2022-12-14 06:08:56,995 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:08:56,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:08:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:08:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:08:56,996 INFO L87 Difference]: Start difference. First operand 9647 states and 43399 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 06:09:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:00,721 INFO L93 Difference]: Finished difference Result 38567 states and 173560 transitions. [2022-12-14 06:09:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:09:00,723 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 06:09:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:00,902 INFO L225 Difference]: With dead ends: 38567 [2022-12-14 06:09:00,903 INFO L226 Difference]: Without dead ends: 38567 [2022-12-14 06:09:00,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:09:00,903 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 469 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:00,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 30 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 06:09:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38567 states. [2022-12-14 06:09:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38567 to 9656. [2022-12-14 06:09:01,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9656 states, 8652 states have (on average 5.018839574664818) internal successors, (43423), 9655 states have internal predecessors, (43423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9656 states to 9656 states and 43423 transitions. [2022-12-14 06:09:01,363 INFO L78 Accepts]: Start accepts. Automaton has 9656 states and 43423 transitions. Word has length 3 [2022-12-14 06:09:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:01,363 INFO L495 AbstractCegarLoop]: Abstraction has 9656 states and 43423 transitions. [2022-12-14 06:09:01,363 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 06:09:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 9656 states and 43423 transitions. [2022-12-14 06:09:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 06:09:01,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:01,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 06:09:01,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:09:01,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 06:09:01,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:01,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:01,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:09:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash 45312024, now seen corresponding path program 1 times [2022-12-14 06:09:01,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:01,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734881868] [2022-12-14 06:09:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:01,971 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 06:09:01,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:01,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:01,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:09:02,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:02,182 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-12-14 06:09:02,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-12-14 06:09:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:02,823 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-12-14 06:09:02,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2022-12-14 06:09:03,779 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2022-12-14 06:09:03,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 182 [2022-12-14 06:09:27,664 WARN L233 SmtUtils]: Spent 11.62s on a formula simplification. DAG size of input: 196 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:09:27,665 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 06:09:27,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:09:27,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:09:27,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734881868] [2022-12-14 06:09:27,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734881868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:27,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:27,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:09:27,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618032496] [2022-12-14 06:09:27,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:27,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:09:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:09:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:09:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-14 06:09:27,668 INFO L87 Difference]: Start difference. First operand 9656 states and 43423 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:28,215 INFO L93 Difference]: Finished difference Result 7891 states and 34598 transitions. [2022-12-14 06:09:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:09:28,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 06:09:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:28,249 INFO L225 Difference]: With dead ends: 7891 [2022-12-14 06:09:28,250 INFO L226 Difference]: Without dead ends: 7891 [2022-12-14 06:09:28,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-14 06:09:28,251 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:28,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 6 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:09:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7891 states. [2022-12-14 06:09:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7891 to 7891. [2022-12-14 06:09:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7891 states, 7113 states have (on average 4.864051736257556) internal successors, (34598), 7890 states have internal predecessors, (34598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7891 states to 7891 states and 34598 transitions. [2022-12-14 06:09:28,436 INFO L78 Accepts]: Start accepts. Automaton has 7891 states and 34598 transitions. Word has length 4 [2022-12-14 06:09:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:28,437 INFO L495 AbstractCegarLoop]: Abstraction has 7891 states and 34598 transitions. [2022-12-14 06:09:28,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 7891 states and 34598 transitions. [2022-12-14 06:09:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 06:09:28,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:28,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 06:09:28,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:28,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:28,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:09:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:28,649 INFO L85 PathProgramCache]: Analyzing trace with hash 45312025, now seen corresponding path program 1 times [2022-12-14 06:09:28,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:28,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133109015] [2022-12-14 06:09:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:28,652 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 06:09:28,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:28,655 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:28,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 06:09:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 06:09:28,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:28,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:28,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:28,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:28,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:28,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:28,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:28,950 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 06:09:28,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-12-14 06:09:28,999 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-14 06:09:28,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-14 06:09:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:29,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 06:09:29,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:29,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 06:09:29,092 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 06:09:29,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:09:29,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:09:29,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133109015] [2022-12-14 06:09:29,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133109015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:29,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:29,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:09:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662097591] [2022-12-14 06:09:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:29,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:09:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:09:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:09:29,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:09:29,094 INFO L87 Difference]: Start difference. First operand 7891 states and 34598 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:29,357 INFO L93 Difference]: Finished difference Result 6126 states and 25773 transitions. [2022-12-14 06:09:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:09:29,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 06:09:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:29,378 INFO L225 Difference]: With dead ends: 6126 [2022-12-14 06:09:29,378 INFO L226 Difference]: Without dead ends: 6126 [2022-12-14 06:09:29,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:09:29,379 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:29,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 6 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:09:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2022-12-14 06:09:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 6126. [2022-12-14 06:09:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 5574 states have (on average 4.623789020452099) internal successors, (25773), 6125 states have internal predecessors, (25773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 25773 transitions. [2022-12-14 06:09:29,492 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 25773 transitions. Word has length 4 [2022-12-14 06:09:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:29,492 INFO L495 AbstractCegarLoop]: Abstraction has 6126 states and 25773 transitions. [2022-12-14 06:09:29,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 25773 transitions. [2022-12-14 06:09:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 06:09:29,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:29,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 06:09:29,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 06:09:29,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:29,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:09:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash 595220137, now seen corresponding path program 1 times [2022-12-14 06:09:29,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:29,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024819739] [2022-12-14 06:09:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:29,695 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 06:09:29,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:29,697 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:29,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 06:09:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 06:09:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:29,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:29,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:29,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:29,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:29,958 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-14 06:09:29,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-12-14 06:09:29,988 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 06:09:29,988 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 31 treesize of output 27 [2022-12-14 06:09:30,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:30,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 06:09:30,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:30,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 06:09:30,108 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 06:09:30,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:09:30,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:09:30,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024819739] [2022-12-14 06:09:30,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024819739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:30,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:30,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:09:30,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644340137] [2022-12-14 06:09:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:09:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:09:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:09:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:09:30,110 INFO L87 Difference]: Start difference. First operand 6126 states and 25773 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 06:09:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:30,366 INFO L93 Difference]: Finished difference Result 5867 states and 24751 transitions. [2022-12-14 06:09:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:09:30,367 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 06:09:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:30,385 INFO L225 Difference]: With dead ends: 5867 [2022-12-14 06:09:30,385 INFO L226 Difference]: Without dead ends: 5867 [2022-12-14 06:09:30,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:09:30,386 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:30,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:09:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2022-12-14 06:09:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 5867. [2022-12-14 06:09:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5867 states, 5365 states have (on average 4.613420316868592) internal successors, (24751), 5866 states have internal predecessors, (24751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 24751 transitions. [2022-12-14 06:09:30,497 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 24751 transitions. Word has length 6 [2022-12-14 06:09:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:30,497 INFO L495 AbstractCegarLoop]: Abstraction has 5867 states and 24751 transitions. [2022-12-14 06:09:30,497 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 06:09:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 24751 transitions. [2022-12-14 06:09:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 06:09:30,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:30,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 06:09:30,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 06:09:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:30,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:09:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 595220139, now seen corresponding path program 1 times [2022-12-14 06:09:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103726293] [2022-12-14 06:09:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:30,700 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 06:09:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:30,701 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:30,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:09:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 06:09:30,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:30,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:30,944 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-12-14 06:09:30,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-12-14 06:09:31,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:31,555 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-12-14 06:09:31,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 52 [2022-12-14 06:09:32,351 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2022-12-14 06:09:32,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 174 [2022-12-14 06:21:40,068 WARN L233 SmtUtils]: Spent 11.12m on a formula simplification. DAG size of input: 766 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:21:40,443 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 06:21:40,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:21:40,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:21:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103726293] [2022-12-14 06:21:40,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103726293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:21:40,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:21:40,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:21:40,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264332463] [2022-12-14 06:21:40,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:21:40,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:21:40,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:21:40,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:21:40,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-14 06:21:40,445 INFO L87 Difference]: Start difference. First operand 5867 states and 24751 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:21:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:21:41,187 INFO L93 Difference]: Finished difference Result 5608 states and 23729 transitions. [2022-12-14 06:21:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:21:41,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 06:21:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:21:41,206 INFO L225 Difference]: With dead ends: 5608 [2022-12-14 06:21:41,206 INFO L226 Difference]: Without dead ends: 5608 [2022-12-14 06:21:41,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 671.6s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-14 06:21:41,207 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:21:41,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:21:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5608 states. [2022-12-14 06:21:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5608 to 5608. [2022-12-14 06:21:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5608 states, 5156 states have (on average 4.602211016291699) internal successors, (23729), 5607 states have internal predecessors, (23729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:21:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 23729 transitions. [2022-12-14 06:21:41,329 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 23729 transitions. Word has length 6 [2022-12-14 06:21:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:21:41,329 INFO L495 AbstractCegarLoop]: Abstraction has 5608 states and 23729 transitions. [2022-12-14 06:21:41,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:21:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 23729 transitions. [2022-12-14 06:21:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 06:21:41,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:21:41,330 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 06:21:41,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:21:41,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:21:41,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:21:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:21:41,533 INFO L85 PathProgramCache]: Analyzing trace with hash 538961547, now seen corresponding path program 2 times [2022-12-14 06:21:41,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:21:41,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167012033] [2022-12-14 06:21:41,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:21:41,534 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 06:21:41,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:21:41,536 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:21:41,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:21:41,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:21:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:21:41,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 06:21:41,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:21:42,009 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:21:42,009 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:21:42,372 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 06:21:42,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:21:43,435 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 06:21:43,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:21:43,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167012033] [2022-12-14 06:21:43,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167012033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:21:43,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121390999] [2022-12-14 06:21:43,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:21:43,435 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:21:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:21:43,436 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:21:43,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 06:21:43,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:21:43,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:21:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:21:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:21:43,933 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:21:43,933 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:21:44,131 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 06:21:44,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:21:45,523 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 06:21:45,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121390999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:21:45,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808369052] [2022-12-14 06:21:45,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:21:45,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:21:45,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:21:45,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:21:45,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:21:45,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:21:45,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:21:45,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:21:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:21:45,980 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:21:45,981 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:21:46,115 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 06:21:46,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:21:46,385 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 06:21:46,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808369052] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:21:46,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:21:46,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 06:21:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060926485] [2022-12-14 06:21:46,385 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:21:46,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 06:21:46,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:21:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 06:21:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:21:46,386 INFO L87 Difference]: Start difference. First operand 5608 states and 23729 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 06:21:49,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:21:51,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:21:53,787 WARN L539 Checker$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 06:21:55,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:21:56,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:00,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:02,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:04,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:05,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:07,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:09,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:11,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:13,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:14,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:16,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:19,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:22:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:29,572 INFO L93 Difference]: Finished difference Result 55928 states and 237021 transitions. [2022-12-14 06:22:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 06:22:29,574 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 06:22:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:29,822 INFO L225 Difference]: With dead ends: 55928 [2022-12-14 06:22:29,822 INFO L226 Difference]: Without dead ends: 55928 [2022-12-14 06:22:29,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:22:29,823 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2041 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 231 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:29,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2041 Valid, 192 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1635 Invalid, 2 Unknown, 0 Unchecked, 39.8s Time] [2022-12-14 06:22:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55928 states. [2022-12-14 06:22:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55928 to 5626. [2022-12-14 06:22:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5174 states have (on average 4.593351372245845) internal successors, (23766), 5625 states have internal predecessors, (23766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 23766 transitions. [2022-12-14 06:22:30,283 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 23766 transitions. Word has length 6 [2022-12-14 06:22:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:30,283 INFO L495 AbstractCegarLoop]: Abstraction has 5626 states and 23766 transitions. [2022-12-14 06:22:30,283 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 06:22:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 23766 transitions. [2022-12-14 06:22:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:22:30,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:30,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:30,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 06:22:30,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 06:22:30,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 06:22:30,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:30,886 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:22:30,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:30,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1271947211, now seen corresponding path program 1 times [2022-12-14 06:22:30,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:22:30,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412748549] [2022-12-14 06:22:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:30,889 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 06:22:30,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:22:30,891 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:30,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:30,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:22:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:31,103 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 06:22:31,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:31,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:22:31,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412748549] [2022-12-14 06:22:31,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412748549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:31,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:31,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:22:31,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048719066] [2022-12-14 06:22:31,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:31,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:22:31,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:22:31,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:22:31,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:31,105 INFO L87 Difference]: Start difference. First operand 5626 states and 23766 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:32,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:32,085 INFO L93 Difference]: Finished difference Result 7099 states and 28952 transitions. [2022-12-14 06:22:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:22:32,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 06:22:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:32,110 INFO L225 Difference]: With dead ends: 7099 [2022-12-14 06:22:32,110 INFO L226 Difference]: Without dead ends: 7099 [2022-12-14 06:22:32,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:32,111 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:32,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 18 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 06:22:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-12-14 06:22:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 6837. [2022-12-14 06:22:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6837 states, 6385 states have (on average 4.435708692247455) internal successors, (28322), 6836 states have internal predecessors, (28322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6837 states to 6837 states and 28322 transitions. [2022-12-14 06:22:32,236 INFO L78 Accepts]: Start accepts. Automaton has 6837 states and 28322 transitions. Word has length 7 [2022-12-14 06:22:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:32,236 INFO L495 AbstractCegarLoop]: Abstraction has 6837 states and 28322 transitions. [2022-12-14 06:22:32,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6837 states and 28322 transitions. [2022-12-14 06:22:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:22:32,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:32,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:32,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 06:22:32,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:32,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:22:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 775938230, now seen corresponding path program 1 times [2022-12-14 06:22:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:22:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035437975] [2022-12-14 06:22:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:32,442 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 06:22:32,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:22:32,445 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 06:22:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:32,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 06:22:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:32,846 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-12-14 06:22:32,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-12-14 06:22:33,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:33,630 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-12-14 06:22:33,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-12-14 06:22:38,536 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-12-14 06:22:38,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-12-14 06:22:41,032 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 06:22:41,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:41,032 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:22:41,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035437975] [2022-12-14 06:22:41,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035437975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:41,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:41,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:22:41,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228436895] [2022-12-14 06:22:41,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:41,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:22:41,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:22:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:22:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-12-14 06:22:41,033 INFO L87 Difference]: Start difference. First operand 6837 states and 28322 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:42,259 INFO L93 Difference]: Finished difference Result 6726 states and 27982 transitions. [2022-12-14 06:22:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:42,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 06:22:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:42,281 INFO L225 Difference]: With dead ends: 6726 [2022-12-14 06:22:42,281 INFO L226 Difference]: Without dead ends: 6726 [2022-12-14 06:22:42,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=14, Invalid=14, Unknown=2, NotChecked=0, Total=30 [2022-12-14 06:22:42,282 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 161 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:42,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 6 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:22:42,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2022-12-14 06:22:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 6726. [2022-12-14 06:22:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6726 states, 6308 states have (on average 4.435954343690551) internal successors, (27982), 6725 states have internal predecessors, (27982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 27982 transitions. [2022-12-14 06:22:42,395 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 27982 transitions. Word has length 8 [2022-12-14 06:22:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:42,396 INFO L495 AbstractCegarLoop]: Abstraction has 6726 states and 27982 transitions. [2022-12-14 06:22:42,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 27982 transitions. [2022-12-14 06:22:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:22:42,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:42,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:42,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 06:22:42,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:42,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:22:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 775938231, now seen corresponding path program 1 times [2022-12-14 06:22:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:22:42,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17113514] [2022-12-14 06:22:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:42,602 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 06:22:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:22:42,605 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:42,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 06:22:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 06:22:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:42,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:43,066 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 06:22:43,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-12-14 06:22:43,106 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 18 treesize of output 16 [2022-12-14 06:22:43,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:43,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 06:22:43,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:43,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 06:22:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:22:43,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:43,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:22:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17113514] [2022-12-14 06:22:43,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17113514] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:43,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:43,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:22:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496560219] [2022-12-14 06:22:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:43,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:22:43,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:22:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:22:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:43,425 INFO L87 Difference]: Start difference. First operand 6726 states and 27982 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:43,872 INFO L93 Difference]: Finished difference Result 6615 states and 27642 transitions. [2022-12-14 06:22:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:43,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 06:22:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:43,893 INFO L225 Difference]: With dead ends: 6615 [2022-12-14 06:22:43,893 INFO L226 Difference]: Without dead ends: 6615 [2022-12-14 06:22:43,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:43,894 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:43,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:22:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6615 states. [2022-12-14 06:22:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6615 to 6615. [2022-12-14 06:22:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6615 states, 6231 states have (on average 4.436206066441984) internal successors, (27642), 6614 states have internal predecessors, (27642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6615 states to 6615 states and 27642 transitions. [2022-12-14 06:22:44,005 INFO L78 Accepts]: Start accepts. Automaton has 6615 states and 27642 transitions. Word has length 8 [2022-12-14 06:22:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:44,005 INFO L495 AbstractCegarLoop]: Abstraction has 6615 states and 27642 transitions. [2022-12-14 06:22:44,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 6615 states and 27642 transitions. [2022-12-14 06:22:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:22:44,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:44,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:44,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 06:22:44,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:44,208 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:22:44,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:44,209 INFO L85 PathProgramCache]: Analyzing trace with hash -4832370, now seen corresponding path program 1 times [2022-12-14 06:22:44,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:22:44,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703858960] [2022-12-14 06:22:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:44,211 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 06:22:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:22:44,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:44,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:22:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:44,503 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 06:22:44,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:44,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:22:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703858960] [2022-12-14 06:22:44,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703858960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:44,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:44,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:22:44,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605259073] [2022-12-14 06:22:44,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:44,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:22:44,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:22:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:22:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:22:44,506 INFO L87 Difference]: Start difference. First operand 6615 states and 27642 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:46,975 INFO L93 Difference]: Finished difference Result 15149 states and 62732 transitions. [2022-12-14 06:22:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:22:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 06:22:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:47,031 INFO L225 Difference]: With dead ends: 15149 [2022-12-14 06:22:47,031 INFO L226 Difference]: Without dead ends: 15149 [2022-12-14 06:22:47,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:22:47,031 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 249 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:47,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 6 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 06:22:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15149 states. [2022-12-14 06:22:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15149 to 7768. [2022-12-14 06:22:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7768 states, 7384 states have (on average 4.450027085590466) internal successors, (32859), 7767 states have internal predecessors, (32859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7768 states to 7768 states and 32859 transitions. [2022-12-14 06:22:47,228 INFO L78 Accepts]: Start accepts. Automaton has 7768 states and 32859 transitions. Word has length 8 [2022-12-14 06:22:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:47,228 INFO L495 AbstractCegarLoop]: Abstraction has 7768 states and 32859 transitions. [2022-12-14 06:22:47,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7768 states and 32859 transitions. [2022-12-14 06:22:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:22:47,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:47,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:47,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:47,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:47,430 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:22:47,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1715725783, now seen corresponding path program 1 times [2022-12-14 06:22:47,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:22:47,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981904683] [2022-12-14 06:22:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:47,433 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 06:22:47,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:22:47,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:47,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 06:22:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:22:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:47,813 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 06:22:47,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:47,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:22:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981904683] [2022-12-14 06:22:47,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981904683] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:47,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:47,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:22:47,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129936522] [2022-12-14 06:22:47,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:47,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:22:47,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:22:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:22:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:47,814 INFO L87 Difference]: Start difference. First operand 7768 states and 32859 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:48,770 INFO L93 Difference]: Finished difference Result 9896 states and 40490 transitions. [2022-12-14 06:22:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:22:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 06:22:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:48,800 INFO L225 Difference]: With dead ends: 9896 [2022-12-14 06:22:48,800 INFO L226 Difference]: Without dead ends: 9896 [2022-12-14 06:22:48,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:48,801 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:48,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 06:22:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9896 states. [2022-12-14 06:22:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9896 to 9617. [2022-12-14 06:22:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9617 states, 9233 states have (on average 4.320155962309109) internal successors, (39888), 9616 states have internal predecessors, (39888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9617 states to 9617 states and 39888 transitions. [2022-12-14 06:22:48,970 INFO L78 Accepts]: Start accepts. Automaton has 9617 states and 39888 transitions. Word has length 9 [2022-12-14 06:22:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:48,970 INFO L495 AbstractCegarLoop]: Abstraction has 9617 states and 39888 transitions. [2022-12-14 06:22:48,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 9617 states and 39888 transitions. [2022-12-14 06:22:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:22:48,971 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:48,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:48,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 06:22:49,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:49,173 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:22:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash -218006610, now seen corresponding path program 1 times [2022-12-14 06:22:49,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:22:49,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461958548] [2022-12-14 06:22:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:49,176 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 06:22:49,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:22:49,179 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:49,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 06:22:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:49,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:22:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:49,656 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 06:22:49,656 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 06:22:49,742 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:22:49,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 06:22:49,805 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:22:49,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 06:22:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:22:49,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:49,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:22:49,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461958548] [2022-12-14 06:22:49,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461958548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:49,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:49,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:22:49,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533090567] [2022-12-14 06:22:49,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:49,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:22:49,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:22:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:22:49,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:49,853 INFO L87 Difference]: Start difference. First operand 9617 states and 39888 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:50,315 INFO L93 Difference]: Finished difference Result 7545 states and 31066 transitions. [2022-12-14 06:22:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:22:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 06:22:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:50,339 INFO L225 Difference]: With dead ends: 7545 [2022-12-14 06:22:50,339 INFO L226 Difference]: Without dead ends: 7545 [2022-12-14 06:22:50,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:22:50,339 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:50,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:22:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7545 states. [2022-12-14 06:22:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7545 to 7545. [2022-12-14 06:22:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7336 states have (on average 4.234732824427481) internal successors, (31066), 7544 states have internal predecessors, (31066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 31066 transitions. [2022-12-14 06:22:50,467 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 31066 transitions. Word has length 9 [2022-12-14 06:22:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:50,467 INFO L495 AbstractCegarLoop]: Abstraction has 7545 states and 31066 transitions. [2022-12-14 06:22:50,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:22:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 31066 transitions. [2022-12-14 06:22:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:22:50,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:50,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:50,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 06:22:50,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:50,670 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-14 06:22:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash -218006609, now seen corresponding path program 1 times [2022-12-14 06:22:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:22:50,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139311017] [2022-12-14 06:22:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:50,672 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 06:22:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:22:50,675 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:50,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/mathsat -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 06:22:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:50,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 06:22:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:51,291 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:22:51,292 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:22:51,728 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 06:22:51,728 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 06:22:51,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:51,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 06:22:51,999 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:22:51,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:22:52,116 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 06:22:52,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 06:22:52,590 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 06:22:52,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:22:56,347 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 06:22:56,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:22:56,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139311017] [2022-12-14 06:22:56,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139311017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:22:56,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1870099938] [2022-12-14 06:22:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:56,348 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:22:56,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:22:56,349 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:22:56,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95012ec0-5337-4884-bddf-1120a8c083d0/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 06:22:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:22:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:56,959 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 06:22:56,959 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 06:22:57,400 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 06:22:57,401 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 06:22:57,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:22:57,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 06:22:57,811 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:22:57,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:22:57,866 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 06:22:57,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 06:22:58,457 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 06:22:58,458 INFO L328 TraceCheckSpWp]: Computing backward predicates...