./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:56:22,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:56:22,811 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-21 18:56:22,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:56:22,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:56:22,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:56:22,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:56:22,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:56:22,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:56:22,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:56:22,869 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:56:22,870 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:56:22,871 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:56:22,872 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:56:22,873 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:56:22,873 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:56:22,874 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:56:22,874 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:56:22,875 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:56:22,875 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:56:22,876 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:56:22,876 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:56:22,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 18:56:22,878 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 18:56:22,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:56:22,879 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:56:22,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:56:22,880 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:56:22,880 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:56:22,881 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 18:56:22,882 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 18:56:22,883 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 18:56:22,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:56:22,883 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 18:56:22,883 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 18:56:22,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:56:22,884 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:56:22,884 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:56:22,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:56:22,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:56:22,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:56:22,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:56:22,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:56:22,886 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:56:22,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:56:22,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:56:22,887 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:56:22,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:56:22,888 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2023-11-21 18:56:23,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:56:23,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:56:23,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:56:23,241 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:56:23,241 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:56:23,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-21 18:56:26,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:56:26,566 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:56:26,567 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-21 18:56:26,576 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/data/67a148685/0817990223244675b5f4bbe4120f5631/FLAG25bb0a955 [2023-11-21 18:56:26,592 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/data/67a148685/0817990223244675b5f4bbe4120f5631 [2023-11-21 18:56:26,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:56:26,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:56:26,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:56:26,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:56:26,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:56:26,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:56:26" (1/1) ... [2023-11-21 18:56:26,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b4632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:26, skipping insertion in model container [2023-11-21 18:56:26,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:56:26" (1/1) ... [2023-11-21 18:56:26,633 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:56:26,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:56:26,935 ERROR L324 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) [2023-11-21 18:56:26,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16e7592f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:26, skipping insertion in model container [2023-11-21 18:56:26,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:56:26,937 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 18:56:26,939 INFO L158 Benchmark]: Toolchain (without parser) took 342.18ms. Allocated memory is still 157.3MB. Free memory was 111.2MB in the beginning and 101.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 18:56:26,940 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 113.2MB. Free memory is still 63.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 18:56:26,941 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.43ms. Allocated memory is still 157.3MB. Free memory was 111.2MB in the beginning and 101.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 18:56:26,943 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 113.2MB. Free memory is still 63.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.43ms. Allocated memory is still 157.3MB. Free memory was 111.2MB in the beginning and 101.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:56:29,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:56:29,612 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-21 18:56:29,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:56:29,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:56:29,677 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:56:29,678 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:56:29,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:56:29,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:56:29,685 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:56:29,686 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:56:29,686 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:56:29,687 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:56:29,689 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:56:29,689 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:56:29,690 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:56:29,691 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 18:56:29,691 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 18:56:29,692 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:56:29,694 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:56:29,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:56:29,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:56:29,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:56:29,696 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 18:56:29,697 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 18:56:29,697 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 18:56:29,698 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:56:29,698 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 18:56:29,699 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 18:56:29,699 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 18:56:29,701 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 18:56:29,701 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:56:29,701 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:56:29,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:56:29,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 18:56:29,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:56:29,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:56:29,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:56:29,705 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:56:29,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:56:29,705 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-21 18:56:29,706 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 18:56:29,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:56:29,706 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:56:29,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:56:29,707 INFO L153 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_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2023-11-21 18:56:30,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:56:30,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:56:30,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:56:30,202 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:56:30,202 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:56:30,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-21 18:56:33,652 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:56:33,949 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:56:33,949 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-21 18:56:33,958 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/data/ca6528cd8/780a49c7afe44335841a08567a332cef/FLAGc398b1eb4 [2023-11-21 18:56:33,976 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/data/ca6528cd8/780a49c7afe44335841a08567a332cef [2023-11-21 18:56:33,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:56:33,985 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:56:33,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:56:33,988 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:56:33,994 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:56:33,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:56:33" (1/1) ... [2023-11-21 18:56:33,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67894a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:33, skipping insertion in model container [2023-11-21 18:56:33,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:56:33" (1/1) ... [2023-11-21 18:56:34,031 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:56:34,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:56:34,322 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 18:56:34,335 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:56:34,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:56:34,401 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:56:34,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:56:34,477 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:56:34,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34 WrapperNode [2023-11-21 18:56:34,477 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:56:34,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:56:34,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:56:34,479 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:56:34,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,513 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,567 INFO L138 Inliner]: procedures = 25, calls = 42, calls flagged for inlining = 18, calls inlined = 32, statements flattened = 273 [2023-11-21 18:56:34,576 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:56:34,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:56:34,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:56:34,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:56:34,587 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,597 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,621 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,644 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:56:34,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:56:34,656 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:56:34,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:56:34,657 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (1/1) ... [2023-11-21 18:56:34,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:56:34,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:56:34,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:56:34,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:56:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:56:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 18:56:34,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 18:56:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 18:56:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 18:56:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 18:56:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 18:56:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 18:56:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 18:56:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:56:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:56:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 18:56:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 18:56:34,746 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 18:56:34,883 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:56:34,886 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:56:35,738 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:56:36,407 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:56:36,408 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 18:56:36,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:56:36 BoogieIcfgContainer [2023-11-21 18:56:36,410 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:56:36,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:56:36,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:56:36,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:56:36,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:56:33" (1/3) ... [2023-11-21 18:56:36,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443d13dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:56:36, skipping insertion in model container [2023-11-21 18:56:36,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:34" (2/3) ... [2023-11-21 18:56:36,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443d13dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:56:36, skipping insertion in model container [2023-11-21 18:56:36,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:56:36" (3/3) ... [2023-11-21 18:56:36,424 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-21 18:56:36,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:56:36,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-11-21 18:56:36,448 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 18:56:36,538 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-21 18:56:36,578 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 62 transitions, 138 flow [2023-11-21 18:56:36,700 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1134 states, 954 states have (on average 3.342767295597484) internal successors, (3189), 1133 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:36,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:56:36,734 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;@7583398e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:56:36,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-21 18:56:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 1134 states, 954 states have (on average 3.342767295597484) internal successors, (3189), 1133 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 18:56:36,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:36,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 18:56:36,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:36,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 943872, now seen corresponding path program 1 times [2023-11-21 18:56:36,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:36,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858091549] [2023-11-21 18:56:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:36,784 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 [2023-11-21 18:56:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:36,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:36,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:36,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:56:36,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:36,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 18:56:37,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 18:56:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 18:56:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 18:56:37,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 18:56:37,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,069 INFO L378 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 18:56:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:37,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:37,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858091549] [2023-11-21 18:56:37,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858091549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:37,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:37,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:56:37,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926316694] [2023-11-21 18:56:37,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:37,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:37,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:37,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:37,124 INFO L87 Difference]: Start difference. First operand has 1134 states, 954 states have (on average 3.342767295597484) internal successors, (3189), 1133 states have internal predecessors, (3189), 0 states have call successors, (0), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:37,420 INFO L93 Difference]: Finished difference Result 1131 states and 3186 transitions. [2023-11-21 18:56:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:37,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-21 18:56:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:37,452 INFO L225 Difference]: With dead ends: 1131 [2023-11-21 18:56:37,452 INFO L226 Difference]: Without dead ends: 1131 [2023-11-21 18:56:37,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:37,457 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:37,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:56:37,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2023-11-21 18:56:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1131. [2023-11-21 18:56:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 953 states have (on average 3.343126967471144) internal successors, (3186), 1130 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3186 transitions. [2023-11-21 18:56:37,597 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3186 transitions. Word has length 3 [2023-11-21 18:56:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:37,598 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 3186 transitions. [2023-11-21 18:56:37,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3186 transitions. [2023-11-21 18:56:37,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 18:56:37,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:37,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 18:56:37,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:37,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:37,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:37,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 943873, now seen corresponding path program 1 times [2023-11-21 18:56:37,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399342102] [2023-11-21 18:56:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:37,813 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 [2023-11-21 18:56:37,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:37,814 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:37,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:37,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 18:56:37,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:37,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-21 18:56:37,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:37,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:37,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:37,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:37,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:38,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:38,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399342102] [2023-11-21 18:56:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399342102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:38,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:38,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:56:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682893855] [2023-11-21 18:56:38,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:38,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:56:38,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:56:38,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:56:38,090 INFO L87 Difference]: Start difference. First operand 1131 states and 3186 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:38,627 INFO L93 Difference]: Finished difference Result 1133 states and 3189 transitions. [2023-11-21 18:56:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:56:38,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-21 18:56:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:38,647 INFO L225 Difference]: With dead ends: 1133 [2023-11-21 18:56:38,647 INFO L226 Difference]: Without dead ends: 1133 [2023-11-21 18:56:38,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:56:38,654 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:38,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 63 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 18:56:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2023-11-21 18:56:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1133. [2023-11-21 18:56:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 955 states have (on average 3.339267015706806) internal successors, (3189), 1132 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 3189 transitions. [2023-11-21 18:56:38,717 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 3189 transitions. Word has length 3 [2023-11-21 18:56:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:38,717 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 3189 transitions. [2023-11-21 18:56:38,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 3189 transitions. [2023-11-21 18:56:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 18:56:38,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:38,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 18:56:38,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:38,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:38,924 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:38,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash 943933, now seen corresponding path program 1 times [2023-11-21 18:56:38,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:38,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604967973] [2023-11-21 18:56:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:38,925 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 [2023-11-21 18:56:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:38,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:38,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:39,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 18:56:39,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:39,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:39,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-21 18:56:39,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:39,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-11-21 18:56:39,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:39,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:39,162 INFO L378 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 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-21 18:56:39,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-21 18:56:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:39,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:39,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604967973] [2023-11-21 18:56:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604967973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:39,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:39,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:56:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009135866] [2023-11-21 18:56:39,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:39,377 INFO L87 Difference]: Start difference. First operand 1133 states and 3189 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:39,719 INFO L93 Difference]: Finished difference Result 936 states and 2572 transitions. [2023-11-21 18:56:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-21 18:56:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:39,729 INFO L225 Difference]: With dead ends: 936 [2023-11-21 18:56:39,730 INFO L226 Difference]: Without dead ends: 936 [2023-11-21 18:56:39,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:39,731 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:39,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 14 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:56:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2023-11-21 18:56:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 936. [2023-11-21 18:56:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 808 states have (on average 3.1831683168316833) internal successors, (2572), 935 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2572 transitions. [2023-11-21 18:56:39,770 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2572 transitions. Word has length 3 [2023-11-21 18:56:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:39,770 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 2572 transitions. [2023-11-21 18:56:39,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2572 transitions. [2023-11-21 18:56:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 18:56:39,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:39,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 18:56:39,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:39,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:39,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:39,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash 943932, now seen corresponding path program 1 times [2023-11-21 18:56:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:39,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811394821] [2023-11-21 18:56:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:39,981 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 [2023-11-21 18:56:39,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:39,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:39,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-21 18:56:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:40,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:56:40,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:40,118 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 18:56:40,119 INFO L378 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 19 treesize of output 22 [2023-11-21 18:56:40,164 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 18:56:40,165 INFO L378 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 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-21 18:56:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:40,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:40,238 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:40,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811394821] [2023-11-21 18:56:40,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811394821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:40,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:40,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:56:40,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989275533] [2023-11-21 18:56:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:40,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:40,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:40,241 INFO L87 Difference]: Start difference. First operand 936 states and 2572 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:40,462 INFO L93 Difference]: Finished difference Result 739 states and 1955 transitions. [2023-11-21 18:56:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:40,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-21 18:56:40,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:40,471 INFO L225 Difference]: With dead ends: 739 [2023-11-21 18:56:40,471 INFO L226 Difference]: Without dead ends: 739 [2023-11-21 18:56:40,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:40,472 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:40,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:56:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-11-21 18:56:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 739. [2023-11-21 18:56:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 661 states have (on average 2.957639939485628) internal successors, (1955), 738 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1955 transitions. [2023-11-21 18:56:40,503 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1955 transitions. Word has length 3 [2023-11-21 18:56:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:40,503 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 1955 transitions. [2023-11-21 18:56:40,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1955 transitions. [2023-11-21 18:56:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 18:56:40,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:40,505 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-21 18:56:40,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:40,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:40,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:40,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash 907091915, now seen corresponding path program 1 times [2023-11-21 18:56:40,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:40,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289680080] [2023-11-21 18:56:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:40,710 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 [2023-11-21 18:56:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:40,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:40,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-21 18:56:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:40,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 18:56:40,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:40,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 18:56:40,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:40,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:40,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:40,845 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:40,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:40,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:40,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:41,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:56:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:41,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:41,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289680080] [2023-11-21 18:56:41,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289680080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:56:41,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1789086715] [2023-11-21 18:56:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:41,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:56:41,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:56:41,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:56:41,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-21 18:56:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:41,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 18:56:41,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:41,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-21 18:56:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:41,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:41,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:41,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:41,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:41,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:41,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:41,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:56:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:41,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1789086715] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:56:41,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770778073] [2023-11-21 18:56:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:41,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:56:41,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:56:41,880 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:56:41,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 18:56:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:41,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 18:56:41,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:41,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 18:56:41,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:41,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:42,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:42,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:42,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:42,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:42,037 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:42,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:42,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:56:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:42,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770778073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:56:42,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 18:56:42,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-11-21 18:56:42,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284089002] [2023-11-21 18:56:42,254 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 18:56:42,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 18:56:42,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 18:56:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-21 18:56:42,255 INFO L87 Difference]: Start difference. First operand 739 states and 1955 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:43,575 INFO L93 Difference]: Finished difference Result 745 states and 1964 transitions. [2023-11-21 18:56:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 18:56:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 18:56:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:43,583 INFO L225 Difference]: With dead ends: 745 [2023-11-21 18:56:43,583 INFO L226 Difference]: Without dead ends: 745 [2023-11-21 18:56:43,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-21 18:56:43,584 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:43,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 18:56:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-11-21 18:56:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 745. [2023-11-21 18:56:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 667 states have (on average 2.944527736131934) internal successors, (1964), 744 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1964 transitions. [2023-11-21 18:56:43,615 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1964 transitions. Word has length 5 [2023-11-21 18:56:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:43,616 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1964 transitions. [2023-11-21 18:56:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1964 transitions. [2023-11-21 18:56:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 18:56:43,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:43,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 18:56:43,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:43,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:44,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-11-21 18:56:44,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt [2023-11-21 18:56:44,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:44,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1943142700, now seen corresponding path program 1 times [2023-11-21 18:56:44,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:44,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873688793] [2023-11-21 18:56:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:44,221 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 [2023-11-21 18:56:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:44,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:44,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:44,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:56:44,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:44,328 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 18:56:44,329 INFO L378 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 18:56:44,353 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 18:56:44,353 INFO L378 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 18:56:44,384 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 18:56:44,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-21 18:56:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:44,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:44,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:44,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873688793] [2023-11-21 18:56:44,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873688793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:44,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:44,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:56:44,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262692878] [2023-11-21 18:56:44,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:44,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:44,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:44,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:44,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:44,492 INFO L87 Difference]: Start difference. First operand 745 states and 1964 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2023-11-21 18:56:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:44,704 INFO L93 Difference]: Finished difference Result 717 states and 1906 transitions. [2023-11-21 18:56:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2023-11-21 18:56:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:44,713 INFO L225 Difference]: With dead ends: 717 [2023-11-21 18:56:44,713 INFO L226 Difference]: Without dead ends: 717 [2023-11-21 18:56:44,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:44,715 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:44,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 13 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:56:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-11-21 18:56:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 717. [2023-11-21 18:56:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 653 states have (on average 2.9188361408882084) internal successors, (1906), 716 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1906 transitions. [2023-11-21 18:56:44,750 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1906 transitions. Word has length 6 [2023-11-21 18:56:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:44,751 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 1906 transitions. [2023-11-21 18:56:44,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2023-11-21 18:56:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1906 transitions. [2023-11-21 18:56:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 18:56:44,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:44,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 18:56:44,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:44,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:44,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1943142699, now seen corresponding path program 1 times [2023-11-21 18:56:44,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:44,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580467424] [2023-11-21 18:56:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:44,958 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 [2023-11-21 18:56:44,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:44,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:44,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:45,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:56:45,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:45,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-21 18:56:45,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-21 18:56:45,106 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 18:56:45,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:45,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:45,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 18:56:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:45,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:45,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:45,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580467424] [2023-11-21 18:56:45,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580467424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:45,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:45,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:56:45,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940672919] [2023-11-21 18:56:45,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:45,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:45,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:45,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:45,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:45,157 INFO L87 Difference]: Start difference. First operand 717 states and 1906 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2023-11-21 18:56:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:45,374 INFO L93 Difference]: Finished difference Result 689 states and 1848 transitions. [2023-11-21 18:56:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:45,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2023-11-21 18:56:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:45,381 INFO L225 Difference]: With dead ends: 689 [2023-11-21 18:56:45,381 INFO L226 Difference]: Without dead ends: 689 [2023-11-21 18:56:45,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:45,382 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:45,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:56:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-21 18:56:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 689. [2023-11-21 18:56:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 639 states have (on average 2.892018779342723) internal successors, (1848), 688 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1848 transitions. [2023-11-21 18:56:45,410 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1848 transitions. Word has length 6 [2023-11-21 18:56:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:45,411 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 1848 transitions. [2023-11-21 18:56:45,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2023-11-21 18:56:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1848 transitions. [2023-11-21 18:56:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 18:56:45,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:45,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:45,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:45,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:45,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:45,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:45,614 INFO L85 PathProgramCache]: Analyzing trace with hash -107878180, now seen corresponding path program 1 times [2023-11-21 18:56:45,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:45,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721063284] [2023-11-21 18:56:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:45,615 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 [2023-11-21 18:56:45,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:45,616 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:45,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:45,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:56:45,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:45,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 18:56:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:45,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 18:56:45,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:45,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 18:56:45,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:45,745 INFO L378 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 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-21 18:56:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:45,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-21 18:56:45,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:45,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-21 18:56:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:45,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:45,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:45,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721063284] [2023-11-21 18:56:45,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721063284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:45,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:45,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:56:45,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088292234] [2023-11-21 18:56:45,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:45,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:56:45,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:45,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:56:45,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:56:45,785 INFO L87 Difference]: Start difference. First operand 689 states and 1848 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) [2023-11-21 18:56:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:46,057 INFO L93 Difference]: Finished difference Result 446 states and 1194 transitions. [2023-11-21 18:56:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:56:46,058 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 [2023-11-21 18:56:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:46,062 INFO L225 Difference]: With dead ends: 446 [2023-11-21 18:56:46,062 INFO L226 Difference]: Without dead ends: 446 [2023-11-21 18:56:46,062 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 [2023-11-21 18:56:46,063 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:46,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:56:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-21 18:56:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2023-11-21 18:56:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 429 states have (on average 2.7832167832167833) internal successors, (1194), 445 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1194 transitions. [2023-11-21 18:56:46,081 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1194 transitions. Word has length 7 [2023-11-21 18:56:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:46,082 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1194 transitions. [2023-11-21 18:56:46,082 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) [2023-11-21 18:56:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1194 transitions. [2023-11-21 18:56:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 18:56:46,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:46,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:46,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:46,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:46,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:46,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash -107878179, now seen corresponding path program 1 times [2023-11-21 18:56:46,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:46,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702633975] [2023-11-21 18:56:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:46,287 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 [2023-11-21 18:56:46,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:46,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:46,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-21 18:56:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:46,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 18:56:46,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:46,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 18:56:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:46,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:46,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:46,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:46,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:46,452 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:46,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:46,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:46,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:46,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702633975] [2023-11-21 18:56:46,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702633975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:46,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:46,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084696809] [2023-11-21 18:56:46,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:46,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:56:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:56:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:56:46,621 INFO L87 Difference]: Start difference. First operand 446 states and 1194 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:47,351 INFO L93 Difference]: Finished difference Result 785 states and 2074 transitions. [2023-11-21 18:56:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:56:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 18:56:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:47,359 INFO L225 Difference]: With dead ends: 785 [2023-11-21 18:56:47,360 INFO L226 Difference]: Without dead ends: 785 [2023-11-21 18:56:47,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 18:56:47,363 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:47,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 26 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 18:56:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2023-11-21 18:56:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 650. [2023-11-21 18:56:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 633 states have (on average 2.838862559241706) internal successors, (1797), 649 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1797 transitions. [2023-11-21 18:56:47,395 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1797 transitions. Word has length 7 [2023-11-21 18:56:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:47,396 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 1797 transitions. [2023-11-21 18:56:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1797 transitions. [2023-11-21 18:56:47,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 18:56:47,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:47,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:47,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:47,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:47,601 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:47,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1234483738, now seen corresponding path program 1 times [2023-11-21 18:56:47,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:47,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32268676] [2023-11-21 18:56:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:47,602 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 [2023-11-21 18:56:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:47,603 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:47,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-21 18:56:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:47,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 18:56:47,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:47,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 18:56:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:47,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:47,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:47,770 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:47,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:47,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:47,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:48,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:48,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32268676] [2023-11-21 18:56:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32268676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:48,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:48,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:48,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199461093] [2023-11-21 18:56:48,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:56:48,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:56:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:56:48,029 INFO L87 Difference]: Start difference. First operand 650 states and 1797 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:48,787 INFO L93 Difference]: Finished difference Result 1010 states and 2761 transitions. [2023-11-21 18:56:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:56:48,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-21 18:56:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:48,796 INFO L225 Difference]: With dead ends: 1010 [2023-11-21 18:56:48,797 INFO L226 Difference]: Without dead ends: 1010 [2023-11-21 18:56:48,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 18:56:48,797 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:48,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 26 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 18:56:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2023-11-21 18:56:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 902. [2023-11-21 18:56:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 885 states have (on average 2.8598870056497177) internal successors, (2531), 901 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2531 transitions. [2023-11-21 18:56:48,835 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2531 transitions. Word has length 10 [2023-11-21 18:56:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:48,836 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 2531 transitions. [2023-11-21 18:56:48,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2531 transitions. [2023-11-21 18:56:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 18:56:48,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:48,838 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-11-21 18:56:48,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-21 18:56:49,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:49,040 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:49,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash -334394583, now seen corresponding path program 2 times [2023-11-21 18:56:49,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738509296] [2023-11-21 18:56:49,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 18:56:49,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:49,043 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:49,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:49,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 18:56:49,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:56:49,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 18:56:49,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:49,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 18:56:49,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:49,197 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:49,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:49,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:49,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:49,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:49,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:49,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:49,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:49,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:56:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:50,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:50,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738509296] [2023-11-21 18:56:50,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738509296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:56:50,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843592583] [2023-11-21 18:56:50,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 18:56:50,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:56:50,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:56:50,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:56:50,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-11-21 18:56:50,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 18:56:50,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:56:50,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 18:56:50,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:50,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 18:56:50,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:50,834 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:50,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:50,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:50,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:50,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:50,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:51,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:56:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843592583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:56:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455579219] [2023-11-21 18:56:51,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 18:56:51,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:56:51,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:56:51,426 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:56:51,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 18:56:51,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 18:56:51,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:56:51,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 18:56:51,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:51,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 18:56:51,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:51,581 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:51,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:51,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:51,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:51,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:51,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:51,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:51,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:56:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:52,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455579219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:56:52,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 18:56:52,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2023-11-21 18:56:52,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445060032] [2023-11-21 18:56:52,148 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 18:56:52,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 18:56:52,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 18:56:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-21 18:56:52,149 INFO L87 Difference]: Start difference. First operand 902 states and 2531 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:56,348 INFO L93 Difference]: Finished difference Result 914 states and 2549 transitions. [2023-11-21 18:56:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 18:56:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 18:56:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:56,356 INFO L225 Difference]: With dead ends: 914 [2023-11-21 18:56:56,356 INFO L226 Difference]: Without dead ends: 914 [2023-11-21 18:56:56,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2023-11-21 18:56:56,358 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:56,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-21 18:56:56,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2023-11-21 18:56:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 914. [2023-11-21 18:56:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 897 states have (on average 2.841694537346711) internal successors, (2549), 913 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2549 transitions. [2023-11-21 18:56:56,412 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2549 transitions. Word has length 11 [2023-11-21 18:56:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:56,413 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 2549 transitions. [2023-11-21 18:56:56,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2549 transitions. [2023-11-21 18:56:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 18:56:56,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:56,421 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:56,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:56,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:56,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:57,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:57,028 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:57,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:57,029 INFO L85 PathProgramCache]: Analyzing trace with hash -287407030, now seen corresponding path program 1 times [2023-11-21 18:56:57,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:57,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534706623] [2023-11-21 18:56:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:57,029 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 [2023-11-21 18:56:57,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:57,030 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:57,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:57,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 18:56:57,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:57,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 18:56:57,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:57,189 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:57,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:57,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:57,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:57,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:57,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:57,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:57,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534706623] [2023-11-21 18:56:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534706623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:57,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:57,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:57,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607905708] [2023-11-21 18:56:57,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:57,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:56:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:56:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:56:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:56:57,407 INFO L87 Difference]: Start difference. First operand 914 states and 2549 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:57,839 INFO L93 Difference]: Finished difference Result 991 states and 2700 transitions. [2023-11-21 18:56:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:56:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 18:56:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:57,848 INFO L225 Difference]: With dead ends: 991 [2023-11-21 18:56:57,848 INFO L226 Difference]: Without dead ends: 964 [2023-11-21 18:56:57,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:56:57,849 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:57,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:56:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2023-11-21 18:56:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 955. [2023-11-21 18:56:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 938 states have (on average 2.8038379530916844) internal successors, (2630), 954 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2630 transitions. [2023-11-21 18:56:57,885 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2630 transitions. Word has length 12 [2023-11-21 18:56:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:57,886 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 2630 transitions. [2023-11-21 18:56:57,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:56:57,886 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2630 transitions. [2023-11-21 18:56:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 18:56:57,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:57,887 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:57,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:58,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:56:58,091 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:56:58,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:58,091 INFO L85 PathProgramCache]: Analyzing trace with hash -430043456, now seen corresponding path program 1 times [2023-11-21 18:56:58,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:56:58,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326544818] [2023-11-21 18:56:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:58,092 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 [2023-11-21 18:56:58,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:56:58,093 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:56:58,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:56:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:58,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 18:56:58,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:58,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 18:56:58,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:58,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:58,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:58,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:58,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:56:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:58,295 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:56:58,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:56:58,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:56:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:56:58,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:56:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:56:59,360 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:56:59,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326544818] [2023-11-21 18:56:59,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326544818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:56:59,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1655881670] [2023-11-21 18:56:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:59,361 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:56:59,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:56:59,363 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:56:59,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-11-21 18:56:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:59,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 18:56:59,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:56:59,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:00,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1655881670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:00,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350460208] [2023-11-21 18:57:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:00,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:00,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:00,220 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:57:00,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-21 18:57:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:00,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 18:57:00,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:00,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:00,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350460208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:00,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 18:57:00,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 25 [2023-11-21 18:57:00,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352973299] [2023-11-21 18:57:00,672 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 18:57:00,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 18:57:00,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:57:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 18:57:00,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-11-21 18:57:00,674 INFO L87 Difference]: Start difference. First operand 955 states and 2630 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:06,347 INFO L93 Difference]: Finished difference Result 2253 states and 6298 transitions. [2023-11-21 18:57:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-21 18:57:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-21 18:57:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:06,365 INFO L225 Difference]: With dead ends: 2253 [2023-11-21 18:57:06,365 INFO L226 Difference]: Without dead ends: 2247 [2023-11-21 18:57:06,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2023-11-21 18:57:06,366 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 746 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:06,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 178 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-21 18:57:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2023-11-21 18:57:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2010. [2023-11-21 18:57:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2001 states have (on average 2.922538730634683) internal successors, (5848), 2009 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 5848 transitions. [2023-11-21 18:57:06,441 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 5848 transitions. Word has length 14 [2023-11-21 18:57:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:06,442 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 5848 transitions. [2023-11-21 18:57:06,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 5848 transitions. [2023-11-21 18:57:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 18:57:06,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:06,444 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:06,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:06,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:06,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:07,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:07,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:57:07,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:07,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1214305542, now seen corresponding path program 1 times [2023-11-21 18:57:07,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:57:07,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537011642] [2023-11-21 18:57:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:07,052 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 [2023-11-21 18:57:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:57:07,053 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:57:07,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-21 18:57:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:07,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 18:57:07,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:07,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-21 18:57:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:07,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:57:07,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:07,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:57:07,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:07,275 INFO L378 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 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 18:57:07,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:07,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:57:07,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:07,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:57:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:57:07,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:57:08,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:57:08,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537011642] [2023-11-21 18:57:08,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537011642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:08,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [311052360] [2023-11-21 18:57:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:08,480 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:57:08,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:57:08,481 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:57:08,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-11-21 18:57:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:08,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 18:57:08,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:09,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [311052360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861222354] [2023-11-21 18:57:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:09,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:57:09,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:57:09,415 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:57:09,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-21 18:57:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:09,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 18:57:09,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:09,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:09,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861222354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:09,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 18:57:09,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 25 [2023-11-21 18:57:09,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968601880] [2023-11-21 18:57:09,874 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 18:57:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-21 18:57:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:57:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-21 18:57:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-11-21 18:57:09,876 INFO L87 Difference]: Start difference. First operand 2010 states and 5848 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:14,711 INFO L93 Difference]: Finished difference Result 3279 states and 9620 transitions. [2023-11-21 18:57:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-21 18:57:14,713 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 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 17 [2023-11-21 18:57:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:14,741 INFO L225 Difference]: With dead ends: 3279 [2023-11-21 18:57:14,741 INFO L226 Difference]: Without dead ends: 3276 [2023-11-21 18:57:14,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2023-11-21 18:57:14,742 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 519 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:14,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 195 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-21 18:57:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2023-11-21 18:57:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 3048. [2023-11-21 18:57:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3043 states have (on average 3.023660860992442) internal successors, (9201), 3047 states have internal predecessors, (9201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 9201 transitions. [2023-11-21 18:57:14,877 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 9201 transitions. Word has length 17 [2023-11-21 18:57:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:14,877 INFO L495 AbstractCegarLoop]: Abstraction has 3048 states and 9201 transitions. [2023-11-21 18:57:14,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:14,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 9201 transitions. [2023-11-21 18:57:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 18:57:14,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:14,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:57:14,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:15,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:15,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:15,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:57:15,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:57:15,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:15,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2077738325, now seen corresponding path program 1 times [2023-11-21 18:57:15,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:57:15,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012150409] [2023-11-21 18:57:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:57:15,496 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 [2023-11-21 18:57:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:57:15,498 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:57:15,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-21 18:57:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:57:15,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:57:15,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:15,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:57:15,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:57:15,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012150409] [2023-11-21 18:57:15,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012150409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:57:15,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:57:15,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 18:57:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546424594] [2023-11-21 18:57:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:57:15,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 18:57:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:57:15,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 18:57:15,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:57:15,790 INFO L87 Difference]: Start difference. First operand 3048 states and 9201 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2023-11-21 18:57:16,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:57:16,194 INFO L93 Difference]: Finished difference Result 4729 states and 14718 transitions. [2023-11-21 18:57:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 18:57:16,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 19 [2023-11-21 18:57:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:57:16,219 INFO L225 Difference]: With dead ends: 4729 [2023-11-21 18:57:16,219 INFO L226 Difference]: Without dead ends: 4681 [2023-11-21 18:57:16,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 18:57:16,221 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:57:16,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 53 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:57:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4681 states. [2023-11-21 18:57:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4681 to 3019. [2023-11-21 18:57:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3014 states have (on average 3.0285335102853352) internal successors, (9128), 3018 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 18:57:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 9128 transitions. [2023-11-21 18:57:16,368 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 9128 transitions. Word has length 19 [2023-11-21 18:57:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:57:16,368 INFO L495 AbstractCegarLoop]: Abstraction has 3019 states and 9128 transitions. [2023-11-21 18:57:16,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2023-11-21 18:57:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 9128 transitions. [2023-11-21 18:57:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 18:57:16,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:57:16,371 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1] [2023-11-21 18:57:16,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-21 18:57:16,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:57:16,574 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-21 18:57:16,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:57:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash -684472731, now seen corresponding path program 3 times [2023-11-21 18:57:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:57:16,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809149675] [2023-11-21 18:57:16,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 18:57:16,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:57:16,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:57:16,576 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -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) [2023-11-21 18:57:16,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-21 18:57:16,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-21 18:57:16,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:57:16,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 18:57:16,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:57:16,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-21 18:57:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:16,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:57:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:16,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:57:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:16,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:57:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:16,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 18:57:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:57:16,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-21 18:57:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:17,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:57:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:57:21,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:57:21,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809149675] [2023-11-21 18:57:21,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809149675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:57:21,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463721222] [2023-11-21 18:57:21,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 18:57:21,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:57:21,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:57:21,384 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:57:21,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_142e51c5-f336-41a6-91c0-5940c015fc87/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process