./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:59:29,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:59:29,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:59:29,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:59:29,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:59:29,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:59:29,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:59:29,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:59:29,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:59:29,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:59:29,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:59:29,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:59:29,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:59:29,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:59:29,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:59:29,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:59:29,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:59:29,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:59:29,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:59:29,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:59:29,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:59:29,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:59:29,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:59:29,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:59:29,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:59:29,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:59:29,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:59:29,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:59:29,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:59:29,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:59:29,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:59:29,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:59:29,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:59:29,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:59:29,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:59:29,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:59:29,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:59:29,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:59:29,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:59:29,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:59:29,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:59:29,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:59:29,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:59:29,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:59:29,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:59:29,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:59:29,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:59:29,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:59:29,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:59:29,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:59:29,762 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:59:29,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:59:29,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:59:29,762 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:59:29,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:59:29,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:59:29,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:59:29,763 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:59:29,763 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:59:29,764 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:59:29,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:59:29,764 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:59:29,764 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:59:29,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:59:29,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:59:29,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:59:29,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:59:29,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:59:29,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:59:29,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:59:29,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:59:29,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:59:29,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 [2022-11-18 20:59:30,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:59:30,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:59:30,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:59:30,085 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:59:30,086 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:59:30,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2022-11-18 20:59:30,186 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data/8f23c7989/7b0b0d8de49643b39fbf13b75ffbaee2/FLAG16ba1e846 [2022-11-18 20:59:30,751 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:59:30,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2022-11-18 20:59:30,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data/8f23c7989/7b0b0d8de49643b39fbf13b75ffbaee2/FLAG16ba1e846 [2022-11-18 20:59:31,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data/8f23c7989/7b0b0d8de49643b39fbf13b75ffbaee2 [2022-11-18 20:59:31,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:59:31,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:59:31,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:59:31,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:59:31,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:59:31,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:59:31" (1/1) ... [2022-11-18 20:59:31,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fbdebfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:31, skipping insertion in model container [2022-11-18 20:59:31,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:59:31" (1/1) ... [2022-11-18 20:59:31,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:59:31,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:59:31,517 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2022-11-18 20:59:31,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:59:31,568 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-18 20:59:31,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3248c493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:31, skipping insertion in model container [2022-11-18 20:59:31,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:59:31,569 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 20:59:31,572 INFO L158 Benchmark]: Toolchain (without parser) took 471.39ms. Allocated memory is still 119.5MB. Free memory was 82.9MB in the beginning and 93.4MB in the end (delta: -10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:59:31,574 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 119.5MB. Free memory was 90.3MB in the beginning and 90.2MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:59:31,576 INFO L158 Benchmark]: CACSL2BoogieTranslator took 465.84ms. Allocated memory is still 119.5MB. Free memory was 82.6MB in the beginning and 93.4MB in the end (delta: -10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:59:31,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 119.5MB. Free memory was 90.3MB in the beginning and 90.2MB in the end (delta: 29.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 465.84ms. Allocated memory is still 119.5MB. Free memory was 82.6MB in the beginning and 93.4MB in the end (delta: -10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:59:34,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:59:34,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:59:34,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:59:34,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:59:34,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:59:34,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:59:34,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:59:34,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:59:34,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:59:34,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:59:34,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:59:34,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:59:34,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:59:34,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:59:34,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:59:34,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:59:34,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:59:34,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:59:34,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:59:34,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:59:34,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:59:34,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:59:34,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:59:34,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:59:34,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:59:34,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:59:34,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:59:34,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:59:34,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:59:34,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:59:34,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:59:34,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:59:34,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:59:34,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:59:34,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:59:34,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:59:34,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:59:34,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:59:34,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:59:34,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:59:34,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-18 20:59:34,398 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:59:34,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:59:34,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:59:34,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:59:34,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:59:34,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:59:34,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:59:34,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:59:34,402 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:59:34,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:59:34,403 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:59:34,403 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:59:34,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:59:34,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:59:34,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:59:34,404 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:59:34,405 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:59:34,405 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:59:34,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:59:34,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:59:34,406 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:59:34,406 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:59:34,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:59:34,407 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:59:34,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:59:34,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:59:34,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:59:34,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:59:34,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:59:34,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:59:34,409 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:59:34,409 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:59:34,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:59:34,410 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 [2022-11-18 20:59:34,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:59:34,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:59:34,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:59:34,922 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:59:34,925 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:59:34,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2022-11-18 20:59:35,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data/97146349d/a6d0860865164379ac69699f271388d9/FLAG74e30c905 [2022-11-18 20:59:35,705 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:59:35,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2022-11-18 20:59:35,718 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data/97146349d/a6d0860865164379ac69699f271388d9/FLAG74e30c905 [2022-11-18 20:59:36,039 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/data/97146349d/a6d0860865164379ac69699f271388d9 [2022-11-18 20:59:36,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:59:36,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:59:36,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:59:36,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:59:36,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:59:36,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a37fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36, skipping insertion in model container [2022-11-18 20:59:36,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:59:36,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:59:36,336 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2022-11-18 20:59:36,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:59:36,420 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 20:59:36,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:59:36,450 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2022-11-18 20:59:36,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:59:36,474 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:59:36,528 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2022-11-18 20:59:36,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:59:36,557 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:59:36,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36 WrapperNode [2022-11-18 20:59:36,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:59:36,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:59:36,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:59:36,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:59:36,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,631 INFO L138 Inliner]: procedures = 28, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 269 [2022-11-18 20:59:36,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:59:36,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:59:36,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:59:36,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:59:36,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,683 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:59:36,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:59:36,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:59:36,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:59:36,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (1/1) ... [2022-11-18 20:59:36,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:59:36,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:36,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:59:36,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:59:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:59:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 20:59:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:59:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 20:59:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:59:36,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:59:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:59:36,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:59:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 20:59:36,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 20:59:36,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:59:36,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:59:36,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:59:36,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:59:36,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 20:59:36,850 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:59:37,012 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:59:37,015 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:59:38,180 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:59:38,195 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:59:38,195 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-18 20:59:38,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:59:38 BoogieIcfgContainer [2022-11-18 20:59:38,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:59:38,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:59:38,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:59:38,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:59:38,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:59:36" (1/3) ... [2022-11-18 20:59:38,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22657f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:59:38, skipping insertion in model container [2022-11-18 20:59:38,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:59:36" (2/3) ... [2022-11-18 20:59:38,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22657f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:59:38, skipping insertion in model container [2022-11-18 20:59:38,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:59:38" (3/3) ... [2022-11-18 20:59:38,211 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2022-11-18 20:59:38,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:59:38,237 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-18 20:59:38,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:59:38,461 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:59:38,529 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:59:38,546 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 373 places, 392 transitions, 808 flow [2022-11-18 20:59:38,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 373 places, 392 transitions, 808 flow [2022-11-18 20:59:38,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 392 transitions, 808 flow [2022-11-18 20:59:38,809 INFO L130 PetriNetUnfolder]: 29/389 cut-off events. [2022-11-18 20:59:38,810 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:59:38,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 389 events. 29/389 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 730 event pairs, 0 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 288. Up to 2 conditions per place. [2022-11-18 20:59:38,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 24864 [2022-11-18 21:00:30,235 INFO L134 LiptonReduction]: Checked pairs total: 26706 [2022-11-18 21:00:30,235 INFO L136 LiptonReduction]: Total number of compositions: 469 [2022-11-18 21:00:30,245 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 69 places, 65 transitions, 154 flow [2022-11-18 21:00:30,403 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2348 states, 1844 states have (on average 4.500542299349241) internal successors, (8299), 2347 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:30,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:00:30,439 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;@47ec1f6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:00:30,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-18 21:00:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 2348 states, 1844 states have (on average 4.500542299349241) internal successors, (8299), 2347 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:00:30,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:30,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:00:30,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash 50231, now seen corresponding path program 1 times [2022-11-18 21:00:30,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:30,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367133703] [2022-11-18 21:00:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:30,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:30,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:30,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:30,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 21:00:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 21:00:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:30,903 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 21:00:30,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 21:00:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:30,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:00:30,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:30,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367133703] [2022-11-18 21:00:30,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367133703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:00:30,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:00:30,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:00:30,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331247561] [2022-11-18 21:00:30,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:00:30,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:00:30,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:30,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:00:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:00:31,009 INFO L87 Difference]: Start difference. First operand has 2348 states, 1844 states have (on average 4.500542299349241) internal successors, (8299), 2347 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:31,485 INFO L93 Difference]: Finished difference Result 2344 states and 8295 transitions. [2022-11-18 21:00:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:00:31,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 21:00:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:31,532 INFO L225 Difference]: With dead ends: 2344 [2022-11-18 21:00:31,532 INFO L226 Difference]: Without dead ends: 2344 [2022-11-18 21:00:31,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:00:31,538 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:31,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:00:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-11-18 21:00:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2022-11-18 21:00:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1844 states have (on average 4.498373101952278) internal successors, (8295), 2343 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8295 transitions. [2022-11-18 21:00:31,769 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8295 transitions. Word has length 2 [2022-11-18 21:00:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:31,770 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 8295 transitions. [2022-11-18 21:00:31,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8295 transitions. [2022-11-18 21:00:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:00:31,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:31,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:00:31,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:31,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:31,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash 50232, now seen corresponding path program 1 times [2022-11-18 21:00:31,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:31,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77656804] [2022-11-18 21:00:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:31,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:31,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:31,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:31,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 21:00:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 21:00:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:32,216 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 21:00:32,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-18 21:00:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:32,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:00:32,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:32,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77656804] [2022-11-18 21:00:32,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77656804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:00:32,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:00:32,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:00:32,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666761279] [2022-11-18 21:00:32,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:00:32,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:00:32,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:00:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:00:32,250 INFO L87 Difference]: Start difference. First operand 2344 states and 8295 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:33,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:33,034 INFO L93 Difference]: Finished difference Result 4684 states and 16586 transitions. [2022-11-18 21:00:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:00:33,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 21:00:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:33,101 INFO L225 Difference]: With dead ends: 4684 [2022-11-18 21:00:33,103 INFO L226 Difference]: Without dead ends: 4684 [2022-11-18 21:00:33,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:00:33,110 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:33,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 21:00:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-11-18 21:00:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 2347. [2022-11-18 21:00:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 1847 states have (on average 4.495397942609637) internal successors, (8303), 2346 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8303 transitions. [2022-11-18 21:00:33,258 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8303 transitions. Word has length 2 [2022-11-18 21:00:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:33,259 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 8303 transitions. [2022-11-18 21:00:33,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8303 transitions. [2022-11-18 21:00:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 21:00:33,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:33,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 21:00:33,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-18 21:00:33,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:33,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:33,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1564241, now seen corresponding path program 1 times [2022-11-18 21:00:33,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:33,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505493806] [2022-11-18 21:00:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:33,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:33,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:33,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:33,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 21:00:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:33,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:00:33,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:33,733 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 21:00:33,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-18 21:00:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:33,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:33,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505493806] [2022-11-18 21:00:33,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505493806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:33,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:33,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-18 21:00:33,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606184738] [2022-11-18 21:00:33,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:33,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:00:33,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:33,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:00:33,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:00:33,960 INFO L87 Difference]: Start difference. First operand 2347 states and 8303 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:36,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:38,274 INFO L93 Difference]: Finished difference Result 11704 states and 41459 transitions. [2022-11-18 21:00:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:00:38,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 3 [2022-11-18 21:00:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:38,475 INFO L225 Difference]: With dead ends: 11704 [2022-11-18 21:00:38,489 INFO L226 Difference]: Without dead ends: 11704 [2022-11-18 21:00:38,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:00:38,491 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 384 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:38,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 0 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-18 21:00:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11704 states. [2022-11-18 21:00:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11704 to 2356. [2022-11-18 21:00:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 1856 states have (on average 4.486530172413793) internal successors, (8327), 2355 states have internal predecessors, (8327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8327 transitions. [2022-11-18 21:00:38,940 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8327 transitions. Word has length 3 [2022-11-18 21:00:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:38,941 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 8327 transitions. [2022-11-18 21:00:38,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8327 transitions. [2022-11-18 21:00:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 21:00:38,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:38,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 21:00:38,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:39,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:39,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 48609611, now seen corresponding path program 1 times [2022-11-18 21:00:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:39,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820291136] [2022-11-18 21:00:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:39,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:39,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:39,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:39,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 21:00:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:39,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:00:39,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:39,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:00:39,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:39,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820291136] [2022-11-18 21:00:39,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820291136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:00:39,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:00:39,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:00:39,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253286342] [2022-11-18 21:00:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:00:39,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:00:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:39,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:00:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:00:39,409 INFO L87 Difference]: Start difference. First operand 2356 states and 8327 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:39,808 INFO L93 Difference]: Finished difference Result 2356 states and 8322 transitions. [2022-11-18 21:00:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:00:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-18 21:00:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:39,825 INFO L225 Difference]: With dead ends: 2356 [2022-11-18 21:00:39,825 INFO L226 Difference]: Without dead ends: 2356 [2022-11-18 21:00:39,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:00:39,827 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:39,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:00:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-18 21:00:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2356. [2022-11-18 21:00:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 1856 states have (on average 4.483836206896552) internal successors, (8322), 2355 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8322 transitions. [2022-11-18 21:00:39,939 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8322 transitions. Word has length 4 [2022-11-18 21:00:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:39,940 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 8322 transitions. [2022-11-18 21:00:39,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8322 transitions. [2022-11-18 21:00:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 21:00:39,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:39,941 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-18 21:00:39,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:00:40,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:40,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash -637336968, now seen corresponding path program 2 times [2022-11-18 21:00:40,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:40,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288301645] [2022-11-18 21:00:40,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:00:40,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:40,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:40,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:40,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 21:00:40,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:00:40,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 21:00:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:40,408 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:40,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:00:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:40,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:41,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:41,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288301645] [2022-11-18 21:00:41,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288301645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:41,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:41,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:00:41,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598363371] [2022-11-18 21:00:41,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:00:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:00:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:00:41,445 INFO L87 Difference]: Start difference. First operand 2356 states and 8322 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:44,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:46,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:48,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:50,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:52,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:54,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:56,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:58,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:01:00,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:01:03,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:01:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:09,639 INFO L93 Difference]: Finished difference Result 7044 states and 24900 transitions. [2022-11-18 21:01:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 21:01:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 6 [2022-11-18 21:01:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:09,696 INFO L225 Difference]: With dead ends: 7044 [2022-11-18 21:01:09,696 INFO L226 Difference]: Without dead ends: 7044 [2022-11-18 21:01:09,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:01:09,698 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 380 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 68 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:09,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 0 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 619 Invalid, 8 Unknown, 0 Unchecked, 26.7s Time] [2022-11-18 21:01:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7044 states. [2022-11-18 21:01:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7044 to 2366. [2022-11-18 21:01:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 1866 states have (on average 4.461950696677385) internal successors, (8326), 2365 states have internal predecessors, (8326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 8326 transitions. [2022-11-18 21:01:09,904 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 8326 transitions. Word has length 6 [2022-11-18 21:01:09,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:09,907 INFO L495 AbstractCegarLoop]: Abstraction has 2366 states and 8326 transitions. [2022-11-18 21:01:09,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 8326 transitions. [2022-11-18 21:01:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:09,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:09,909 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-18 21:01:09,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:10,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:10,114 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:10,114 INFO L85 PathProgramCache]: Analyzing trace with hash 834290648, now seen corresponding path program 3 times [2022-11-18 21:01:10,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:10,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401855219] [2022-11-18 21:01:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:01:10,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:10,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:10,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:10,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 21:01:10,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 21:01:10,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:10,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 21:01:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 21:01:10,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 21:01:10,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:10,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401855219] [2022-11-18 21:01:10,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401855219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:10,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:10,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-18 21:01:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406991541] [2022-11-18 21:01:10,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:01:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:01:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:01:10,825 INFO L87 Difference]: Start difference. First operand 2366 states and 8326 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:11,688 INFO L93 Difference]: Finished difference Result 2356 states and 8304 transitions. [2022-11-18 21:01:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 21:01:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:11,704 INFO L225 Difference]: With dead ends: 2356 [2022-11-18 21:01:11,704 INFO L226 Difference]: Without dead ends: 2356 [2022-11-18 21:01:11,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:01:11,705 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:11,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 21:01:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-18 21:01:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2356. [2022-11-18 21:01:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 1859 states have (on average 4.466917697686928) internal successors, (8304), 2355 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8304 transitions. [2022-11-18 21:01:11,841 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8304 transitions. Word has length 12 [2022-11-18 21:01:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:11,841 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 8304 transitions. [2022-11-18 21:01:11,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8304 transitions. [2022-11-18 21:01:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 21:01:11,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:11,842 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-11-18 21:01:11,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:12,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:12,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:12,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:12,043 INFO L85 PathProgramCache]: Analyzing trace with hash -694755404, now seen corresponding path program 1 times [2022-11-18 21:01:12,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:12,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68227316] [2022-11-18 21:01:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:12,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:12,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:12,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 21:01:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:12,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:12,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:12,605 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-18 21:01:12,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-18 21:01:13,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:13,134 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:01:13,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-18 21:01:14,038 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-18 21:01:14,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-18 21:01:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:15,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:15,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68227316] [2022-11-18 21:01:15,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68227316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:15,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:15,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:01:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279154290] [2022-11-18 21:01:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:15,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:01:15,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:15,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:01:15,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:15,346 INFO L87 Difference]: Start difference. First operand 2356 states and 8304 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:15,625 INFO L93 Difference]: Finished difference Result 2355 states and 8303 transitions. [2022-11-18 21:01:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:01:15,626 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 19 [2022-11-18 21:01:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:15,639 INFO L225 Difference]: With dead ends: 2355 [2022-11-18 21:01:15,640 INFO L226 Difference]: Without dead ends: 2355 [2022-11-18 21:01:15,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:15,641 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:15,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-18 21:01:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-11-18 21:01:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-11-18 21:01:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 1859 states have (on average 4.466379774072082) internal successors, (8303), 2354 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8303 transitions. [2022-11-18 21:01:15,722 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8303 transitions. Word has length 19 [2022-11-18 21:01:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:15,722 INFO L495 AbstractCegarLoop]: Abstraction has 2355 states and 8303 transitions. [2022-11-18 21:01:15,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8303 transitions. [2022-11-18 21:01:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 21:01:15,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:15,723 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-11-18 21:01:15,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-18 21:01:15,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:15,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash -694755403, now seen corresponding path program 1 times [2022-11-18 21:01:15,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:15,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593673178] [2022-11-18 21:01:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:15,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:15,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:15,947 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:15,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 21:01:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:01:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:16,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:16,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:16,619 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:01:16,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:01:16,670 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 21:01:16,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-11-18 21:01:16,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:16,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:01:17,030 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:01:17,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:01:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:17,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:17,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:17,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593673178] [2022-11-18 21:01:17,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593673178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:17,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:17,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:17,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454700566] [2022-11-18 21:01:17,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:01:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:01:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:17,233 INFO L87 Difference]: Start difference. First operand 2355 states and 8303 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) [2022-11-18 21:01:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:17,532 INFO L93 Difference]: Finished difference Result 2354 states and 8302 transitions. [2022-11-18 21:01:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:01:17,532 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 19 [2022-11-18 21:01:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:17,541 INFO L225 Difference]: With dead ends: 2354 [2022-11-18 21:01:17,542 INFO L226 Difference]: Without dead ends: 2354 [2022-11-18 21:01:17,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:17,543 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:17,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2022-11-18 21:01:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2022-11-18 21:01:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2354. [2022-11-18 21:01:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 1859 states have (on average 4.4658418504572355) internal successors, (8302), 2353 states have internal predecessors, (8302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 8302 transitions. [2022-11-18 21:01:17,622 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 8302 transitions. Word has length 19 [2022-11-18 21:01:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:17,623 INFO L495 AbstractCegarLoop]: Abstraction has 2354 states and 8302 transitions. [2022-11-18 21:01:17,623 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) [2022-11-18 21:01:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 8302 transitions. [2022-11-18 21:01:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 21:01:17,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:17,624 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:17,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:17,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:17,838 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:17,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1939975584, now seen corresponding path program 1 times [2022-11-18 21:01:17,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:17,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83498023] [2022-11-18 21:01:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:17,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:17,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:17,840 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:17,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 21:01:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:18,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:01:18,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:18,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:18,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:18,446 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:01:18,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:01:18,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 21:01:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:18,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:01:18,812 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:01:18,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:01:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:19,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:19,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:19,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83498023] [2022-11-18 21:01:19,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83498023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:19,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:19,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:19,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518019517] [2022-11-18 21:01:19,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:19,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:01:19,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:01:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:19,078 INFO L87 Difference]: Start difference. First operand 2354 states and 8302 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:19,352 INFO L93 Difference]: Finished difference Result 2353 states and 8300 transitions. [2022-11-18 21:01:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:01:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 21:01:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:19,363 INFO L225 Difference]: With dead ends: 2353 [2022-11-18 21:01:19,363 INFO L226 Difference]: Without dead ends: 2353 [2022-11-18 21:01:19,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:19,364 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:19,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2022-11-18 21:01:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-11-18 21:01:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2353. [2022-11-18 21:01:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 1858 states have (on average 4.467168998923574) internal successors, (8300), 2352 states have internal predecessors, (8300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 8300 transitions. [2022-11-18 21:01:19,442 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 8300 transitions. Word has length 21 [2022-11-18 21:01:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:19,443 INFO L495 AbstractCegarLoop]: Abstraction has 2353 states and 8300 transitions. [2022-11-18 21:01:19,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 8300 transitions. [2022-11-18 21:01:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 21:01:19,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:19,444 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:19,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:19,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:19,661 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1939975586, now seen corresponding path program 1 times [2022-11-18 21:01:19,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:19,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008039475] [2022-11-18 21:01:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:19,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:19,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:19,663 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:19,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 21:01:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:20,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:01:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:20,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:20,157 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-18 21:01:20,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-18 21:01:20,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:20,514 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-18 21:01:20,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-18 21:01:20,815 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-18 21:01:20,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-18 21:01:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:21,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:21,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008039475] [2022-11-18 21:01:21,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008039475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:21,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:21,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:01:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593800457] [2022-11-18 21:01:21,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:21,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:01:21,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:01:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:21,142 INFO L87 Difference]: Start difference. First operand 2353 states and 8300 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:21,360 INFO L93 Difference]: Finished difference Result 2352 states and 8298 transitions. [2022-11-18 21:01:21,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:01:21,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 21:01:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:21,370 INFO L225 Difference]: With dead ends: 2352 [2022-11-18 21:01:21,370 INFO L226 Difference]: Without dead ends: 2352 [2022-11-18 21:01:21,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:21,371 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:21,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-11-18 21:01:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2022-11-18 21:01:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2352. [2022-11-18 21:01:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 1857 states have (on average 4.468497576736672) internal successors, (8298), 2351 states have internal predecessors, (8298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8298 transitions. [2022-11-18 21:01:21,438 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8298 transitions. Word has length 21 [2022-11-18 21:01:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:21,438 INFO L495 AbstractCegarLoop]: Abstraction has 2352 states and 8298 transitions. [2022-11-18 21:01:21,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8298 transitions. [2022-11-18 21:01:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:21,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:21,439 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:21,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:21,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:21,658 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash -9696643, now seen corresponding path program 1 times [2022-11-18 21:01:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:21,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473721097] [2022-11-18 21:01:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:21,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:21,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:21,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:21,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 21:01:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:22,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:01:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:22,117 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 21:01:22,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 21:01:22,167 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 21:01:22,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-18 21:01:22,203 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:01:22,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:01:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:22,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:22,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:22,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473721097] [2022-11-18 21:01:22,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473721097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:22,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:22,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:01:22,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940234212] [2022-11-18 21:01:22,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:22,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:01:22,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:01:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:22,236 INFO L87 Difference]: Start difference. First operand 2352 states and 8298 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:22,547 INFO L93 Difference]: Finished difference Result 1840 states and 6451 transitions. [2022-11-18 21:01:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:01:22,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 22 [2022-11-18 21:01:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:22,553 INFO L225 Difference]: With dead ends: 1840 [2022-11-18 21:01:22,553 INFO L226 Difference]: Without dead ends: 1840 [2022-11-18 21:01:22,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:22,554 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:22,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:01:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-11-18 21:01:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1840. [2022-11-18 21:01:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1510 states have (on average 4.272185430463576) internal successors, (6451), 1839 states have internal predecessors, (6451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6451 transitions. [2022-11-18 21:01:22,604 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6451 transitions. Word has length 22 [2022-11-18 21:01:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:22,605 INFO L495 AbstractCegarLoop]: Abstraction has 1840 states and 6451 transitions. [2022-11-18 21:01:22,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6451 transitions. [2022-11-18 21:01:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:22,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:22,606 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:22,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-18 21:01:22,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:22,821 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash -9696642, now seen corresponding path program 1 times [2022-11-18 21:01:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:22,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116371461] [2022-11-18 21:01:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:22,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:22,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:22,823 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:22,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-18 21:01:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:23,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:01:23,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:23,365 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 21:01:23,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 21:01:23,504 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 21:01:23,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-18 21:01:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:23,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:01:23,626 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:01:23,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 21:01:23,681 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:01:23,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:01:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:23,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:23,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:23,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116371461] [2022-11-18 21:01:23,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116371461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:23,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:23,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406752166] [2022-11-18 21:01:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:01:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:01:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:23,754 INFO L87 Difference]: Start difference. First operand 1840 states and 6451 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:24,335 INFO L93 Difference]: Finished difference Result 3206 states and 11232 transitions. [2022-11-18 21:01:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:01:24,336 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 22 [2022-11-18 21:01:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:24,345 INFO L225 Difference]: With dead ends: 3206 [2022-11-18 21:01:24,345 INFO L226 Difference]: Without dead ends: 3206 [2022-11-18 21:01:24,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:01:24,345 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 145 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:24,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:01:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2022-11-18 21:01:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 2068. [2022-11-18 21:01:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 1738 states have (on average 4.5811277330264675) internal successors, (7962), 2067 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 7962 transitions. [2022-11-18 21:01:24,412 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 7962 transitions. Word has length 22 [2022-11-18 21:01:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:24,412 INFO L495 AbstractCegarLoop]: Abstraction has 2068 states and 7962 transitions. [2022-11-18 21:01:24,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 7962 transitions. [2022-11-18 21:01:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:24,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:24,414 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:24,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:24,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:24,629 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:24,629 INFO L85 PathProgramCache]: Analyzing trace with hash -9696482, now seen corresponding path program 1 times [2022-11-18 21:01:24,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:24,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864164073] [2022-11-18 21:01:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:24,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:24,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:24,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:24,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 21:01:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:25,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:01:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:25,141 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:01:25,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:01:25,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 21:01:25,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:25,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:01:25,393 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:01:25,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:01:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:25,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:25,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864164073] [2022-11-18 21:01:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864164073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:25,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:25,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:25,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870968211] [2022-11-18 21:01:25,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:25,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:01:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:01:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:25,670 INFO L87 Difference]: Start difference. First operand 2068 states and 7962 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:26,039 INFO L93 Difference]: Finished difference Result 2067 states and 7957 transitions. [2022-11-18 21:01:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:01:26,040 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 22 [2022-11-18 21:01:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:26,050 INFO L225 Difference]: With dead ends: 2067 [2022-11-18 21:01:26,051 INFO L226 Difference]: Without dead ends: 2067 [2022-11-18 21:01:26,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:01:26,052 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:26,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-11-18 21:01:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-11-18 21:01:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2067. [2022-11-18 21:01:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1737 states have (on average 4.580886586067933) internal successors, (7957), 2066 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 7957 transitions. [2022-11-18 21:01:26,124 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 7957 transitions. Word has length 22 [2022-11-18 21:01:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:26,125 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 7957 transitions. [2022-11-18 21:01:26,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 7957 transitions. [2022-11-18 21:01:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:26,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:26,126 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:26,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:26,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:26,341 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:26,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:26,341 INFO L85 PathProgramCache]: Analyzing trace with hash -9696570, now seen corresponding path program 1 times [2022-11-18 21:01:26,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:26,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657223000] [2022-11-18 21:01:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:26,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:26,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:26,343 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:26,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 21:01:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:26,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:01:26,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:26,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:01:26,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 21:01:26,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:26,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:01:26,922 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:01:26,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 21:01:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:26,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:26,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657223000] [2022-11-18 21:01:26,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657223000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:26,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:26,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:01:26,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631337072] [2022-11-18 21:01:26,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:26,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:01:26,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:26,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:01:26,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:26,998 INFO L87 Difference]: Start difference. First operand 2067 states and 7957 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:27,606 INFO L93 Difference]: Finished difference Result 2977 states and 10401 transitions. [2022-11-18 21:01:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:01:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 22 [2022-11-18 21:01:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:27,615 INFO L225 Difference]: With dead ends: 2977 [2022-11-18 21:01:27,615 INFO L226 Difference]: Without dead ends: 2977 [2022-11-18 21:01:27,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:01:27,616 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:27,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:01:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2022-11-18 21:01:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2067. [2022-11-18 21:01:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1737 states have (on average 4.450201496833621) internal successors, (7730), 2066 states have internal predecessors, (7730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 7730 transitions. [2022-11-18 21:01:27,701 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 7730 transitions. Word has length 22 [2022-11-18 21:01:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:27,703 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 7730 transitions. [2022-11-18 21:01:27,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 7730 transitions. [2022-11-18 21:01:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:27,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:27,707 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:27,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:27,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:27,922 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash -9696568, now seen corresponding path program 1 times [2022-11-18 21:01:27,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:27,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609105911] [2022-11-18 21:01:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:27,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:27,924 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:27,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 21:01:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:28,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 21:01:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:28,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 21:01:28,413 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 21:01:28,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-18 21:01:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:28,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:28,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:28,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609105911] [2022-11-18 21:01:28,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609105911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:28,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:28,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869457181] [2022-11-18 21:01:28,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:28,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:01:28,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:01:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:28,436 INFO L87 Difference]: Start difference. First operand 2067 states and 7730 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:28,709 INFO L93 Difference]: Finished difference Result 1611 states and 5821 transitions. [2022-11-18 21:01:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:01:28,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 22 [2022-11-18 21:01:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:28,714 INFO L225 Difference]: With dead ends: 1611 [2022-11-18 21:01:28,714 INFO L226 Difference]: Without dead ends: 1611 [2022-11-18 21:01:28,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:28,715 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:28,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:01:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-11-18 21:01:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2022-11-18 21:01:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1397 states have (on average 4.166785969935576) internal successors, (5821), 1610 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5821 transitions. [2022-11-18 21:01:28,754 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5821 transitions. Word has length 22 [2022-11-18 21:01:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:28,754 INFO L495 AbstractCegarLoop]: Abstraction has 1611 states and 5821 transitions. [2022-11-18 21:01:28,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5821 transitions. [2022-11-18 21:01:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:28,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:28,755 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:28,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:28,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:28,970 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash -9696484, now seen corresponding path program 1 times [2022-11-18 21:01:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:28,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077491600] [2022-11-18 21:01:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:28,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:28,973 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:28,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-18 21:01:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:29,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:01:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:29,462 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-18 21:01:29,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-18 21:01:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:29,814 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-18 21:01:29,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-18 21:01:30,113 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-18 21:01:30,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-18 21:01:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:01:30,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:30,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:30,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077491600] [2022-11-18 21:01:30,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077491600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:30,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:30,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:01:30,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884526385] [2022-11-18 21:01:30,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:30,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:01:30,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:30,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:01:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:30,378 INFO L87 Difference]: Start difference. First operand 1611 states and 5821 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:30,555 INFO L93 Difference]: Finished difference Result 1610 states and 5818 transitions. [2022-11-18 21:01:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:01:30,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 22 [2022-11-18 21:01:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:30,560 INFO L225 Difference]: With dead ends: 1610 [2022-11-18 21:01:30,560 INFO L226 Difference]: Without dead ends: 1610 [2022-11-18 21:01:30,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:30,561 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:30,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-18 21:01:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-11-18 21:01:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2022-11-18 21:01:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1396 states have (on average 4.167621776504298) internal successors, (5818), 1609 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5818 transitions. [2022-11-18 21:01:30,592 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5818 transitions. Word has length 22 [2022-11-18 21:01:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:30,593 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 5818 transitions. [2022-11-18 21:01:30,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5818 transitions. [2022-11-18 21:01:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 21:01:30,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:30,594 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:30,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:30,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:30,796 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:30,796 INFO L85 PathProgramCache]: Analyzing trace with hash -300695923, now seen corresponding path program 1 times [2022-11-18 21:01:30,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:30,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833436942] [2022-11-18 21:01:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:30,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:30,798 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:30,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-18 21:01:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:31,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:01:31,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:31,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:31,289 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-18 21:01:31,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-18 21:01:31,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:31,624 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-18 21:01:31,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-18 21:01:39,255 WARN L233 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 50 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:01:40,027 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2022-11-18 21:01:40,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 166 [2022-11-18 21:04:28,654 WARN L233 SmtUtils]: Spent 1.81m on a formula simplification. DAG size of input: 880 DAG size of output: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:04:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:28,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:28,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833436942] [2022-11-18 21:04:28,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833436942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:28,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:28,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:28,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876593419] [2022-11-18 21:04:28,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:28,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:28,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:28,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-18 21:04:28,997 INFO L87 Difference]: Start difference. First operand 1610 states and 5818 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:29,287 INFO L93 Difference]: Finished difference Result 1609 states and 5815 transitions. [2022-11-18 21:04:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 23 [2022-11-18 21:04:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:29,294 INFO L225 Difference]: With dead ends: 1609 [2022-11-18 21:04:29,294 INFO L226 Difference]: Without dead ends: 1609 [2022-11-18 21:04:29,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.4s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-18 21:04:29,295 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:29,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-11-18 21:04:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-18 21:04:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-18 21:04:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1395 states have (on average 4.168458781362007) internal successors, (5815), 1608 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5815 transitions. [2022-11-18 21:04:29,336 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5815 transitions. Word has length 23 [2022-11-18 21:04:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:29,336 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5815 transitions. [2022-11-18 21:04:29,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5815 transitions. [2022-11-18 21:04:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 21:04:29,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:29,337 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:29,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:04:29,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:29,538 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:29,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:29,538 INFO L85 PathProgramCache]: Analyzing trace with hash -300695922, now seen corresponding path program 1 times [2022-11-18 21:04:29,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:29,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194533263] [2022-11-18 21:04:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:29,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:29,540 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:29,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 21:04:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:04:30,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:30,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:30,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:30,202 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:04:30,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:04:30,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:04:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:30,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:04:30,622 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:04:30,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:04:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:31,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:31,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:31,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194533263] [2022-11-18 21:04:31,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194533263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:31,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:31,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351417054] [2022-11-18 21:04:31,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:31,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:31,073 INFO L87 Difference]: Start difference. First operand 1609 states and 5815 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:31,513 INFO L93 Difference]: Finished difference Result 1608 states and 5812 transitions. [2022-11-18 21:04:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 23 [2022-11-18 21:04:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:31,521 INFO L225 Difference]: With dead ends: 1608 [2022-11-18 21:04:31,522 INFO L226 Difference]: Without dead ends: 1608 [2022-11-18 21:04:31,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:31,523 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:31,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-11-18 21:04:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-11-18 21:04:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1608. [2022-11-18 21:04:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1394 states have (on average 4.169296987087518) internal successors, (5812), 1607 states have internal predecessors, (5812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5812 transitions. [2022-11-18 21:04:31,564 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5812 transitions. Word has length 23 [2022-11-18 21:04:31,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:31,564 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 5812 transitions. [2022-11-18 21:04:31,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5812 transitions. [2022-11-18 21:04:31,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 21:04:31,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:31,565 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:31,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:31,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:31,766 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash -300592230, now seen corresponding path program 1 times [2022-11-18 21:04:31,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:31,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483703575] [2022-11-18 21:04:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:31,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:31,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:31,768 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:31,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-18 21:04:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:32,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:04:32,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:32,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:32,420 INFO L321 Elim1Store]: treesize reduction 59, result has 36.6 percent of original size [2022-11-18 21:04:32,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 39 [2022-11-18 21:04:32,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-18 21:04:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:32,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 21:04:33,162 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:04:33,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-18 21:04:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:34,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:34,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483703575] [2022-11-18 21:04:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483703575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:34,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:34,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:04:34,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871863009] [2022-11-18 21:04:34,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:34,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:04:34,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:04:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:04:34,314 INFO L87 Difference]: Start difference. First operand 1608 states and 5812 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:34,755 INFO L93 Difference]: Finished difference Result 1609 states and 5815 transitions. [2022-11-18 21:04:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:04:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 23 [2022-11-18 21:04:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:34,761 INFO L225 Difference]: With dead ends: 1609 [2022-11-18 21:04:34,761 INFO L226 Difference]: Without dead ends: 1609 [2022-11-18 21:04:34,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:04:34,762 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:34,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 159 Unchecked, 0.4s Time] [2022-11-18 21:04:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-18 21:04:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-18 21:04:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1395 states have (on average 4.168458781362007) internal successors, (5815), 1608 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5815 transitions. [2022-11-18 21:04:34,800 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5815 transitions. Word has length 23 [2022-11-18 21:04:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:34,800 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5815 transitions. [2022-11-18 21:04:34,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5815 transitions. [2022-11-18 21:04:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 21:04:34,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:34,801 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:34,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:35,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:35,006 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:35,006 INFO L85 PathProgramCache]: Analyzing trace with hash -300592232, now seen corresponding path program 1 times [2022-11-18 21:04:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:35,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994210678] [2022-11-18 21:04:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:35,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:35,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:35,008 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:35,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-18 21:04:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:04:35,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:35,655 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 21:04:35,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-18 21:04:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:36,374 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-18 21:04:36,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 54 [2022-11-18 21:04:36,667 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:04:36,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-18 21:04:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:37,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:37,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994210678] [2022-11-18 21:04:37,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994210678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:37,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:37,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:04:37,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910147069] [2022-11-18 21:04:37,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:37,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:04:37,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:37,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:04:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:37,082 INFO L87 Difference]: Start difference. First operand 1609 states and 5815 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:37,366 INFO L93 Difference]: Finished difference Result 1609 states and 5814 transitions. [2022-11-18 21:04:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:37,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 23 [2022-11-18 21:04:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:37,373 INFO L225 Difference]: With dead ends: 1609 [2022-11-18 21:04:37,373 INFO L226 Difference]: Without dead ends: 1609 [2022-11-18 21:04:37,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:37,374 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:37,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2022-11-18 21:04:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-18 21:04:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-18 21:04:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1395 states have (on average 4.167741935483871) internal successors, (5814), 1608 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5814 transitions. [2022-11-18 21:04:37,408 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5814 transitions. Word has length 23 [2022-11-18 21:04:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:37,408 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5814 transitions. [2022-11-18 21:04:37,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5814 transitions. [2022-11-18 21:04:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 21:04:37,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:37,409 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:37,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:04:37,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:37,609 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash -300590184, now seen corresponding path program 1 times [2022-11-18 21:04:37,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:37,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495014638] [2022-11-18 21:04:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:37,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:37,611 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:37,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-18 21:04:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:38,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:04:38,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:38,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:38,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:38,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:38,273 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:04:38,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:04:38,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 21:04:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:38,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:04:38,773 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:04:38,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:04:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:39,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:39,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495014638] [2022-11-18 21:04:39,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495014638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:39,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:39,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:39,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128684667] [2022-11-18 21:04:39,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:39,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:39,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:39,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:39,175 INFO L87 Difference]: Start difference. First operand 1609 states and 5814 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:39,806 INFO L93 Difference]: Finished difference Result 1610 states and 5816 transitions. [2022-11-18 21:04:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:39,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 23 [2022-11-18 21:04:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:39,812 INFO L225 Difference]: With dead ends: 1610 [2022-11-18 21:04:39,812 INFO L226 Difference]: Without dead ends: 1610 [2022-11-18 21:04:39,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:39,813 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:39,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-11-18 21:04:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-11-18 21:04:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2022-11-18 21:04:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1396 states have (on average 4.166189111747851) internal successors, (5816), 1609 states have internal predecessors, (5816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5816 transitions. [2022-11-18 21:04:39,855 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5816 transitions. Word has length 23 [2022-11-18 21:04:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:39,856 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 5816 transitions. [2022-11-18 21:04:39,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5816 transitions. [2022-11-18 21:04:39,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 21:04:39,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:39,857 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:39,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:40,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:40,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -300590186, now seen corresponding path program 1 times [2022-11-18 21:04:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:40,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491721960] [2022-11-18 21:04:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:40,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:40,074 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:40,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-18 21:04:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:40,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:04:40,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:40,793 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-18 21:04:40,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-18 21:04:41,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:41,352 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-18 21:04:41,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-18 21:04:41,917 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-18 21:04:41,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-18 21:04:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:42,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:42,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:42,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491721960] [2022-11-18 21:04:42,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491721960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:42,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:42,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:04:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363967795] [2022-11-18 21:04:42,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:42,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:42,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:42,683 INFO L87 Difference]: Start difference. First operand 1610 states and 5816 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:42,986 INFO L93 Difference]: Finished difference Result 1610 states and 5815 transitions. [2022-11-18 21:04:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:42,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 23 [2022-11-18 21:04:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:42,991 INFO L225 Difference]: With dead ends: 1610 [2022-11-18 21:04:42,991 INFO L226 Difference]: Without dead ends: 1610 [2022-11-18 21:04:42,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:42,992 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:42,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-18 21:04:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-11-18 21:04:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2022-11-18 21:04:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1396 states have (on average 4.165472779369628) internal successors, (5815), 1609 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5815 transitions. [2022-11-18 21:04:43,022 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5815 transitions. Word has length 23 [2022-11-18 21:04:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:43,022 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 5815 transitions. [2022-11-18 21:04:43,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5815 transitions. [2022-11-18 21:04:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:04:43,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:43,023 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:43,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:43,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:43,226 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:43,226 INFO L85 PathProgramCache]: Analyzing trace with hash -731233773, now seen corresponding path program 1 times [2022-11-18 21:04:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018541573] [2022-11-18 21:04:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:43,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:43,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:43,228 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:43,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-18 21:04:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:43,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 21:04:43,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:43,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:43,834 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-18 21:04:43,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-18 21:04:44,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:44,444 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-18 21:04:44,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-18 21:04:49,886 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-18 21:04:49,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-18 21:04:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:51,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:51,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:51,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018541573] [2022-11-18 21:04:51,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018541573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:51,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:51,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:04:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448279199] [2022-11-18 21:04:51,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:51,514 INFO L87 Difference]: Start difference. First operand 1610 states and 5815 transitions. Second operand has 4 states, 3 states have (on average 4.0) 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) [2022-11-18 21:04:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:51,748 INFO L93 Difference]: Finished difference Result 1609 states and 5811 transitions. [2022-11-18 21:04:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) 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 24 [2022-11-18 21:04:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:51,753 INFO L225 Difference]: With dead ends: 1609 [2022-11-18 21:04:51,753 INFO L226 Difference]: Without dead ends: 1609 [2022-11-18 21:04:51,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:51,754 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:51,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-18 21:04:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-18 21:04:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-18 21:04:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1395 states have (on average 4.165591397849463) internal successors, (5811), 1608 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5811 transitions. [2022-11-18 21:04:51,793 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5811 transitions. Word has length 24 [2022-11-18 21:04:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:51,794 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5811 transitions. [2022-11-18 21:04:51,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) 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) [2022-11-18 21:04:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5811 transitions. [2022-11-18 21:04:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:04:51,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:51,795 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:51,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:04:52,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:52,009 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash -731233772, now seen corresponding path program 1 times [2022-11-18 21:04:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:52,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422326120] [2022-11-18 21:04:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:52,012 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:52,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-18 21:04:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:04:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:52,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:52,788 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 21:04:52,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 21:04:52,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 82 [2022-11-18 21:04:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:53,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:04:53,307 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:04:53,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:04:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:53,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:53,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:53,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422326120] [2022-11-18 21:04:53,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422326120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:53,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:53,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:53,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682659801] [2022-11-18 21:04:53,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:53,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:53,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:53,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:53,785 INFO L87 Difference]: Start difference. First operand 1609 states and 5811 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:54,203 INFO L93 Difference]: Finished difference Result 1608 states and 5807 transitions. [2022-11-18 21:04:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 24 [2022-11-18 21:04:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:54,207 INFO L225 Difference]: With dead ends: 1608 [2022-11-18 21:04:54,207 INFO L226 Difference]: Without dead ends: 1608 [2022-11-18 21:04:54,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:54,208 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:54,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 83 Unchecked, 0.4s Time] [2022-11-18 21:04:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-11-18 21:04:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1608. [2022-11-18 21:04:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1394 states have (on average 4.16571018651363) internal successors, (5807), 1607 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5807 transitions. [2022-11-18 21:04:54,247 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5807 transitions. Word has length 24 [2022-11-18 21:04:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:54,247 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 5807 transitions. [2022-11-18 21:04:54,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5807 transitions. [2022-11-18 21:04:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:04:54,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:54,248 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:54,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:54,464 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -731634793, now seen corresponding path program 1 times [2022-11-18 21:04:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:54,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682298839] [2022-11-18 21:04:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:54,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:54,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:54,466 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:54,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-18 21:04:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:54,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 21:04:54,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:54,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:04:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:55,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:55,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:55,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682298839] [2022-11-18 21:04:55,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682298839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:55,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:55,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:04:55,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778560284] [2022-11-18 21:04:55,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:55,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:55,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:55,108 INFO L87 Difference]: Start difference. First operand 1608 states and 5807 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:55,967 INFO L93 Difference]: Finished difference Result 2734 states and 9927 transitions. [2022-11-18 21:04:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 24 [2022-11-18 21:04:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:55,975 INFO L225 Difference]: With dead ends: 2734 [2022-11-18 21:04:55,975 INFO L226 Difference]: Without dead ends: 2734 [2022-11-18 21:04:55,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:04:55,976 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:55,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 21:04:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2022-11-18 21:04:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 1828. [2022-11-18 21:04:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1614 states have (on average 4.511152416356877) internal successors, (7281), 1827 states have internal predecessors, (7281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 7281 transitions. [2022-11-18 21:04:56,012 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 7281 transitions. Word has length 24 [2022-11-18 21:04:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:56,013 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 7281 transitions. [2022-11-18 21:04:56,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 7281 transitions. [2022-11-18 21:04:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:04:56,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:56,014 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:56,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:56,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:56,229 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:56,229 INFO L85 PathProgramCache]: Analyzing trace with hash -731634792, now seen corresponding path program 1 times [2022-11-18 21:04:56,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:56,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366539022] [2022-11-18 21:04:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:56,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:56,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:56,231 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:56,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-18 21:04:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 21:04:56,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:56,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 21:04:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:04:56,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:56,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366539022] [2022-11-18 21:04:56,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366539022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:56,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:56,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:56,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930617019] [2022-11-18 21:04:56,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:56,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:56,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:56,706 INFO L87 Difference]: Start difference. First operand 1828 states and 7281 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:57,155 INFO L93 Difference]: Finished difference Result 1380 states and 5328 transitions. [2022-11-18 21:04:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:57,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 24 [2022-11-18 21:04:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:57,162 INFO L225 Difference]: With dead ends: 1380 [2022-11-18 21:04:57,162 INFO L226 Difference]: Without dead ends: 1380 [2022-11-18 21:04:57,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:57,163 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:57,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:04:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-11-18 21:04:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1380. [2022-11-18 21:04:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1251 states have (on average 4.258992805755396) internal successors, (5328), 1379 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5328 transitions. [2022-11-18 21:04:57,201 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5328 transitions. Word has length 24 [2022-11-18 21:04:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:57,201 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 5328 transitions. [2022-11-18 21:04:57,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5328 transitions. [2022-11-18 21:04:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:04:57,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:57,202 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:57,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:57,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:57,402 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:04:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash -731634727, now seen corresponding path program 1 times [2022-11-18 21:04:57,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:57,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111212923] [2022-11-18 21:04:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:57,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:57,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:57,404 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:57,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-18 21:04:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:04:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:57,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:58,027 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-18 21:04:58,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-18 21:04:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:58,531 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-18 21:04:58,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-18 21:05:02,306 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-18 21:05:02,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-18 21:05:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:05,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:05,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:05,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111212923] [2022-11-18 21:05:05,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111212923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:05,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:05,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:05,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853407793] [2022-11-18 21:05:05,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:05,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:05,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-18 21:05:05,149 INFO L87 Difference]: Start difference. First operand 1380 states and 5328 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:05,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:05,382 INFO L93 Difference]: Finished difference Result 1379 states and 5323 transitions. [2022-11-18 21:05:05,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:05:05,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 24 [2022-11-18 21:05:05,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:05,387 INFO L225 Difference]: With dead ends: 1379 [2022-11-18 21:05:05,387 INFO L226 Difference]: Without dead ends: 1379 [2022-11-18 21:05:05,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-18 21:05:05,388 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:05,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-18 21:05:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-18 21:05:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1379. [2022-11-18 21:05:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1250 states have (on average 4.2584) internal successors, (5323), 1378 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 5323 transitions. [2022-11-18 21:05:05,435 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 5323 transitions. Word has length 24 [2022-11-18 21:05:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:05,435 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 5323 transitions. [2022-11-18 21:05:05,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 5323 transitions. [2022-11-18 21:05:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:05:05,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:05,435 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:05,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:05,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:05,636 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash -731634726, now seen corresponding path program 1 times [2022-11-18 21:05:05,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:05,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855662962] [2022-11-18 21:05:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:05,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:05,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:05,640 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:05,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-18 21:05:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:05:06,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:06,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:06,425 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 21:05:06,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 21:05:06,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-11-18 21:05:06,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:06,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:06,952 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:05:06,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:05:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:07,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:07,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855662962] [2022-11-18 21:05:07,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855662962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:07,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:07,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:07,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393522960] [2022-11-18 21:05:07,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:07,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:07,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:07,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:07,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:07,453 INFO L87 Difference]: Start difference. First operand 1379 states and 5323 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:07,884 INFO L93 Difference]: Finished difference Result 1378 states and 5318 transitions. [2022-11-18 21:05:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:05:07,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 24 [2022-11-18 21:05:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:07,889 INFO L225 Difference]: With dead ends: 1378 [2022-11-18 21:05:07,890 INFO L226 Difference]: Without dead ends: 1378 [2022-11-18 21:05:07,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:07,890 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:07,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2022-11-18 21:05:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-11-18 21:05:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1378. [2022-11-18 21:05:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1249 states have (on average 4.257806244995996) internal successors, (5318), 1377 states have internal predecessors, (5318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5318 transitions. [2022-11-18 21:05:07,921 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5318 transitions. Word has length 24 [2022-11-18 21:05:07,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:07,921 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 5318 transitions. [2022-11-18 21:05:07,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5318 transitions. [2022-11-18 21:05:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:05:07,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:07,922 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:07,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:08,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:08,123 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash -731634868, now seen corresponding path program 1 times [2022-11-18 21:05:08,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:08,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376443379] [2022-11-18 21:05:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:08,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:08,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:08,125 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:08,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-18 21:05:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:05:08,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:08,964 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 21:05:08,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 21:05:09,225 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 21:05:09,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-18 21:05:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:09,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:09,425 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:05:09,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 21:05:09,536 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:05:09,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:09,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:09,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:09,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376443379] [2022-11-18 21:05:09,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376443379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:09,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:09,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:09,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940121185] [2022-11-18 21:05:09,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:09,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:09,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:09,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:09,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:09,687 INFO L87 Difference]: Start difference. First operand 1378 states and 5318 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:10,466 INFO L93 Difference]: Finished difference Result 1776 states and 6372 transitions. [2022-11-18 21:05:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:05:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 24 [2022-11-18 21:05:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:10,472 INFO L225 Difference]: With dead ends: 1776 [2022-11-18 21:05:10,472 INFO L226 Difference]: Without dead ends: 1776 [2022-11-18 21:05:10,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:05:10,473 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 130 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:10,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 21:05:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-11-18 21:05:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1378. [2022-11-18 21:05:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1249 states have (on average 4.108887109687751) internal successors, (5132), 1377 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5132 transitions. [2022-11-18 21:05:10,523 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5132 transitions. Word has length 24 [2022-11-18 21:05:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:10,523 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 5132 transitions. [2022-11-18 21:05:10,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5132 transitions. [2022-11-18 21:05:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:05:10,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:10,524 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:10,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-18 21:05:10,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:10,725 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash -728419197, now seen corresponding path program 1 times [2022-11-18 21:05:10,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:10,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767133040] [2022-11-18 21:05:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:10,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:10,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:10,727 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:10,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-18 21:05:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:11,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:05:11,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:11,571 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 21:05:11,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-18 21:05:11,794 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 21:05:11,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 21:05:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:11,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:11,982 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:05:11,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 21:05:12,104 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:05:12,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:12,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:15,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767133040] [2022-11-18 21:05:15,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767133040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:15,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:05:15,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-18 21:05:15,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519953272] [2022-11-18 21:05:15,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:15,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:05:15,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:15,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:05:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:05:15,583 INFO L87 Difference]: Start difference. First operand 1378 states and 5132 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:18,069 INFO L93 Difference]: Finished difference Result 4084 states and 14743 transitions. [2022-11-18 21:05:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:05:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-18 21:05:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:18,083 INFO L225 Difference]: With dead ends: 4084 [2022-11-18 21:05:18,083 INFO L226 Difference]: Without dead ends: 4084 [2022-11-18 21:05:18,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:05:18,084 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 500 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:18,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 0 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 308 Invalid, 0 Unknown, 1 Unchecked, 2.0s Time] [2022-11-18 21:05:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2022-11-18 21:05:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 2407. [2022-11-18 21:05:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2278 states have (on average 4.391571553994733) internal successors, (10004), 2406 states have internal predecessors, (10004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 10004 transitions. [2022-11-18 21:05:18,170 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 10004 transitions. Word has length 24 [2022-11-18 21:05:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:18,170 INFO L495 AbstractCegarLoop]: Abstraction has 2407 states and 10004 transitions. [2022-11-18 21:05:18,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 10004 transitions. [2022-11-18 21:05:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:05:18,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:18,171 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:18,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:18,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:18,387 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash -728419037, now seen corresponding path program 1 times [2022-11-18 21:05:18,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:18,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499373555] [2022-11-18 21:05:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:18,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:18,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:18,389 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:18,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-18 21:05:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:05:18,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:19,182 INFO L321 Elim1Store]: treesize reduction 59, result has 36.6 percent of original size [2022-11-18 21:05:19,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 39 [2022-11-18 21:05:19,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 21:05:19,526 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-18 21:05:19,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-18 21:05:19,953 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-18 21:05:19,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 38 [2022-11-18 21:05:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:20,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:20,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:20,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499373555] [2022-11-18 21:05:20,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499373555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:20,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:20,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330830716] [2022-11-18 21:05:20,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:20,702 INFO L87 Difference]: Start difference. First operand 2407 states and 10004 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:21,162 INFO L93 Difference]: Finished difference Result 2362 states and 9868 transitions. [2022-11-18 21:05:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:05:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 24 [2022-11-18 21:05:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:21,169 INFO L225 Difference]: With dead ends: 2362 [2022-11-18 21:05:21,169 INFO L226 Difference]: Without dead ends: 2362 [2022-11-18 21:05:21,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 10 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:21,170 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:21,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-18 21:05:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-11-18 21:05:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2022-11-18 21:05:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2245 states have (on average 4.395545657015591) internal successors, (9868), 2361 states have internal predecessors, (9868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 9868 transitions. [2022-11-18 21:05:21,223 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 9868 transitions. Word has length 24 [2022-11-18 21:05:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:21,223 INFO L495 AbstractCegarLoop]: Abstraction has 2362 states and 9868 transitions. [2022-11-18 21:05:21,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 9868 transitions. [2022-11-18 21:05:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:05:21,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:21,224 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:21,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:21,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:21,426 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash -728419125, now seen corresponding path program 1 times [2022-11-18 21:05:21,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:21,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183297591] [2022-11-18 21:05:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:21,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:21,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:21,428 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:21,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-18 21:05:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:05:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:22,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:05:22,118 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:05:22,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:22,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:23,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183297591] [2022-11-18 21:05:23,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183297591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:23,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:05:23,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-18 21:05:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617830946] [2022-11-18 21:05:23,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:23,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:05:23,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:23,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:05:23,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:05:23,124 INFO L87 Difference]: Start difference. First operand 2362 states and 9868 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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) [2022-11-18 21:05:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:25,257 INFO L93 Difference]: Finished difference Result 3723 states and 13352 transitions. [2022-11-18 21:05:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:05:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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 24 [2022-11-18 21:05:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:25,269 INFO L225 Difference]: With dead ends: 3723 [2022-11-18 21:05:25,269 INFO L226 Difference]: Without dead ends: 3723 [2022-11-18 21:05:25,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:05:25,269 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 266 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:25,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 0 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 109 Unchecked, 1.9s Time] [2022-11-18 21:05:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-11-18 21:05:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 2362. [2022-11-18 21:05:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2245 states have (on average 4.167037861915367) internal successors, (9355), 2361 states have internal predecessors, (9355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 9355 transitions. [2022-11-18 21:05:25,336 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 9355 transitions. Word has length 24 [2022-11-18 21:05:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:25,337 INFO L495 AbstractCegarLoop]: Abstraction has 2362 states and 9355 transitions. [2022-11-18 21:05:25,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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) [2022-11-18 21:05:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 9355 transitions. [2022-11-18 21:05:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:05:25,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:25,338 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:25,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-18 21:05:25,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:25,553 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:25,553 INFO L85 PathProgramCache]: Analyzing trace with hash -728419039, now seen corresponding path program 1 times [2022-11-18 21:05:25,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:25,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566061753] [2022-11-18 21:05:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:25,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:25,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:25,555 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:25,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-18 21:05:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:26,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:05:26,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:26,279 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 21:05:26,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-18 21:05:26,899 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-18 21:05:26,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-18 21:05:27,737 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-18 21:05:27,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 74 [2022-11-18 21:05:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:29,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:29,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:29,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566061753] [2022-11-18 21:05:29,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566061753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:29,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:29,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:05:29,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433740079] [2022-11-18 21:05:29,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:29,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:05:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:29,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:05:29,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:05:29,301 INFO L87 Difference]: Start difference. First operand 2362 states and 9355 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:29,528 INFO L93 Difference]: Finished difference Result 2361 states and 9349 transitions. [2022-11-18 21:05:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:05:29,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 24 [2022-11-18 21:05:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:29,537 INFO L225 Difference]: With dead ends: 2361 [2022-11-18 21:05:29,537 INFO L226 Difference]: Without dead ends: 2361 [2022-11-18 21:05:29,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:05:29,538 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:29,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-11-18 21:05:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-11-18 21:05:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2022-11-18 21:05:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2244 states have (on average 4.1662210338680925) internal successors, (9349), 2360 states have internal predecessors, (9349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 9349 transitions. [2022-11-18 21:05:29,627 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 9349 transitions. Word has length 24 [2022-11-18 21:05:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:29,628 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 9349 transitions. [2022-11-18 21:05:29,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 9349 transitions. [2022-11-18 21:05:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:29,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:29,629 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:29,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:29,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:29,846 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1193406189, now seen corresponding path program 1 times [2022-11-18 21:05:29,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111626904] [2022-11-18 21:05:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:29,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:29,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:29,848 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:29,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-18 21:05:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:05:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:30,536 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-18 21:05:30,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-18 21:05:30,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:31,067 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-18 21:05:31,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-18 21:05:36,807 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-18 21:05:36,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-18 21:05:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:38,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:38,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:38,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111626904] [2022-11-18 21:05:38,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111626904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:38,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:38,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:05:38,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412437912] [2022-11-18 21:05:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:38,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:05:38,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:05:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=6, Unknown=1, NotChecked=0, Total=12 [2022-11-18 21:05:38,375 INFO L87 Difference]: Start difference. First operand 2361 states and 9349 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:38,604 INFO L93 Difference]: Finished difference Result 2360 states and 9344 transitions. [2022-11-18 21:05:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:05:38,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:38,612 INFO L225 Difference]: With dead ends: 2360 [2022-11-18 21:05:38,612 INFO L226 Difference]: Without dead ends: 2360 [2022-11-18 21:05:38,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5, Invalid=6, Unknown=1, NotChecked=0, Total=12 [2022-11-18 21:05:38,613 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:38,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-11-18 21:05:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2022-11-18 21:05:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2360. [2022-11-18 21:05:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2243 states have (on average 4.165849308961213) internal successors, (9344), 2359 states have internal predecessors, (9344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 9344 transitions. [2022-11-18 21:05:38,654 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 9344 transitions. Word has length 25 [2022-11-18 21:05:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:38,655 INFO L495 AbstractCegarLoop]: Abstraction has 2360 states and 9344 transitions. [2022-11-18 21:05:38,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 9344 transitions. [2022-11-18 21:05:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:38,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:38,655 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:38,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:38,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:38,856 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1193406188, now seen corresponding path program 1 times [2022-11-18 21:05:38,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:38,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742441613] [2022-11-18 21:05:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:38,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:38,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:38,858 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:38,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-18 21:05:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:05:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:39,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:39,568 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:05:39,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:05:39,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:05:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:39,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:39,992 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:05:39,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:05:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:40,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:40,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:40,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742441613] [2022-11-18 21:05:40,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742441613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:40,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:40,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:40,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422218727] [2022-11-18 21:05:40,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:40,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:40,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:40,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:40,562 INFO L87 Difference]: Start difference. First operand 2360 states and 9344 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:40,973 INFO L93 Difference]: Finished difference Result 2359 states and 9339 transitions. [2022-11-18 21:05:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:05:40,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:40,984 INFO L225 Difference]: With dead ends: 2359 [2022-11-18 21:05:40,984 INFO L226 Difference]: Without dead ends: 2359 [2022-11-18 21:05:40,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:40,984 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:40,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-11-18 21:05:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-11-18 21:05:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2359. [2022-11-18 21:05:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2242 states have (on average 4.165477252453167) internal successors, (9339), 2358 states have internal predecessors, (9339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 9339 transitions. [2022-11-18 21:05:41,027 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 9339 transitions. Word has length 25 [2022-11-18 21:05:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:41,028 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 9339 transitions. [2022-11-18 21:05:41,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 9339 transitions. [2022-11-18 21:05:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:41,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:41,028 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:41,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-18 21:05:41,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:41,229 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:41,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1193411831, now seen corresponding path program 1 times [2022-11-18 21:05:41,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:41,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904171783] [2022-11-18 21:05:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:41,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:41,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:41,231 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:41,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-18 21:05:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:41,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:05:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:41,965 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:05:41,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:05:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:42,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:05:42,365 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:05:42,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:05:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:42,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:42,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:42,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904171783] [2022-11-18 21:05:42,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904171783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:42,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:42,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:42,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137839372] [2022-11-18 21:05:42,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:42,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:42,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:42,683 INFO L87 Difference]: Start difference. First operand 2359 states and 9339 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:43,097 INFO L93 Difference]: Finished difference Result 2361 states and 9345 transitions. [2022-11-18 21:05:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:05:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:43,106 INFO L225 Difference]: With dead ends: 2361 [2022-11-18 21:05:43,106 INFO L226 Difference]: Without dead ends: 2361 [2022-11-18 21:05:43,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:43,107 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:43,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-11-18 21:05:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-11-18 21:05:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2360. [2022-11-18 21:05:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2243 states have (on average 4.16540347748551) internal successors, (9343), 2359 states have internal predecessors, (9343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 9343 transitions. [2022-11-18 21:05:43,157 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 9343 transitions. Word has length 25 [2022-11-18 21:05:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:43,157 INFO L495 AbstractCegarLoop]: Abstraction has 2360 states and 9343 transitions. [2022-11-18 21:05:43,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 9343 transitions. [2022-11-18 21:05:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:43,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:43,158 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:43,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:43,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:43,358 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1193411830, now seen corresponding path program 1 times [2022-11-18 21:05:43,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:43,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718859153] [2022-11-18 21:05:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:43,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:43,360 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:43,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-18 21:05:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:43,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:05:43,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:43,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:44,140 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 21:05:44,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 21:05:44,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 82 [2022-11-18 21:05:44,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:44,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:44,614 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:05:44,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:05:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:45,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:45,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718859153] [2022-11-18 21:05:45,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718859153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:45,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:45,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:45,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379355991] [2022-11-18 21:05:45,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:45,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:45,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:45,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:45,164 INFO L87 Difference]: Start difference. First operand 2360 states and 9343 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:45,561 INFO L93 Difference]: Finished difference Result 2359 states and 9339 transitions. [2022-11-18 21:05:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:05:45,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:45,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:45,569 INFO L225 Difference]: With dead ends: 2359 [2022-11-18 21:05:45,569 INFO L226 Difference]: Without dead ends: 2359 [2022-11-18 21:05:45,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:45,570 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:45,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-11-18 21:05:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-11-18 21:05:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2359. [2022-11-18 21:05:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2242 states have (on average 4.165477252453167) internal successors, (9339), 2358 states have internal predecessors, (9339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 9339 transitions. [2022-11-18 21:05:45,611 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 9339 transitions. Word has length 25 [2022-11-18 21:05:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:45,611 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 9339 transitions. [2022-11-18 21:05:45,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 9339 transitions. [2022-11-18 21:05:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:45,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:45,612 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:45,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:45,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:45,813 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:45,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1193409785, now seen corresponding path program 1 times [2022-11-18 21:05:45,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:45,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644335230] [2022-11-18 21:05:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:45,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:45,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:45,815 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:45,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-18 21:05:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:05:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:46,507 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 21:05:46,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-18 21:05:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:46,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:05:46,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:46,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:05:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:47,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:47,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:47,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644335230] [2022-11-18 21:05:47,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644335230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:47,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:47,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:47,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265581663] [2022-11-18 21:05:47,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:47,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:47,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:47,216 INFO L87 Difference]: Start difference. First operand 2359 states and 9339 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:47,621 INFO L93 Difference]: Finished difference Result 2361 states and 9343 transitions. [2022-11-18 21:05:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:05:47,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:47,628 INFO L225 Difference]: With dead ends: 2361 [2022-11-18 21:05:47,628 INFO L226 Difference]: Without dead ends: 2361 [2022-11-18 21:05:47,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:47,629 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:47,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-18 21:05:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-11-18 21:05:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2022-11-18 21:05:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2244 states have (on average 4.163547237076648) internal successors, (9343), 2360 states have internal predecessors, (9343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 9343 transitions. [2022-11-18 21:05:47,671 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 9343 transitions. Word has length 25 [2022-11-18 21:05:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:47,671 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 9343 transitions. [2022-11-18 21:05:47,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 9343 transitions. [2022-11-18 21:05:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:47,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:47,672 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:47,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-18 21:05:47,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:47,872 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1193409784, now seen corresponding path program 1 times [2022-11-18 21:05:47,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:47,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391435303] [2022-11-18 21:05:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:47,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:47,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:47,874 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:47,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-18 21:05:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:05:48,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:48,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:48,634 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:05:48,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:05:48,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:05:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:48,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:49,039 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:05:49,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:05:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:49,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:49,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391435303] [2022-11-18 21:05:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391435303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:49,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:49,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:49,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288429035] [2022-11-18 21:05:49,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:49,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:49,581 INFO L87 Difference]: Start difference. First operand 2361 states and 9343 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:49,993 INFO L93 Difference]: Finished difference Result 2361 states and 9342 transitions. [2022-11-18 21:05:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:05:49,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:50,002 INFO L225 Difference]: With dead ends: 2361 [2022-11-18 21:05:50,002 INFO L226 Difference]: Without dead ends: 2361 [2022-11-18 21:05:50,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:50,003 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:50,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-11-18 21:05:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-11-18 21:05:50,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2022-11-18 21:05:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2244 states have (on average 4.163101604278075) internal successors, (9342), 2360 states have internal predecessors, (9342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 9342 transitions. [2022-11-18 21:05:50,080 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 9342 transitions. Word has length 25 [2022-11-18 21:05:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:50,080 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 9342 transitions. [2022-11-18 21:05:50,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 9342 transitions. [2022-11-18 21:05:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:50,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:50,081 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:50,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:50,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:50,281 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:50,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1193183981, now seen corresponding path program 2 times [2022-11-18 21:05:50,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:50,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205194826] [2022-11-18 21:05:50,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:05:50,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:50,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:50,283 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:50,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-18 21:05:50,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 21:05:50,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:50,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:05:50,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:50,797 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:05:50,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:05:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:51,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:05:51,255 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:05:51,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:05:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:51,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:51,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:51,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205194826] [2022-11-18 21:05:51,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205194826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:51,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:51,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:51,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849533519] [2022-11-18 21:05:51,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:51,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:51,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:51,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:51,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:51,593 INFO L87 Difference]: Start difference. First operand 2361 states and 9342 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:52,016 INFO L93 Difference]: Finished difference Result 2522 states and 9952 transitions. [2022-11-18 21:05:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:05:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:52,023 INFO L225 Difference]: With dead ends: 2522 [2022-11-18 21:05:52,024 INFO L226 Difference]: Without dead ends: 2522 [2022-11-18 21:05:52,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:52,024 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:52,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-11-18 21:05:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2022-11-18 21:05:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2369. [2022-11-18 21:05:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2252 states have (on average 4.161634103019538) internal successors, (9372), 2368 states have internal predecessors, (9372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 9372 transitions. [2022-11-18 21:05:52,063 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 9372 transitions. Word has length 25 [2022-11-18 21:05:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:52,063 INFO L495 AbstractCegarLoop]: Abstraction has 2369 states and 9372 transitions. [2022-11-18 21:05:52,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 9372 transitions. [2022-11-18 21:05:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:52,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:52,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:52,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:52,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:52,264 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1205840723, now seen corresponding path program 1 times [2022-11-18 21:05:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:52,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310595273] [2022-11-18 21:05:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:52,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:52,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:52,266 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:52,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-18 21:05:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:52,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:05:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:52,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:53,047 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:05:53,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:05:53,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:53,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:05:53,434 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:05:53,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:05:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:53,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:53,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310595273] [2022-11-18 21:05:53,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310595273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:53,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:53,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286543652] [2022-11-18 21:05:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:53,781 INFO L87 Difference]: Start difference. First operand 2369 states and 9372 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:54,170 INFO L93 Difference]: Finished difference Result 2370 states and 9376 transitions. [2022-11-18 21:05:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:05:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:54,177 INFO L225 Difference]: With dead ends: 2370 [2022-11-18 21:05:54,177 INFO L226 Difference]: Without dead ends: 2370 [2022-11-18 21:05:54,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:54,178 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:54,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-11-18 21:05:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-11-18 21:05:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2370. [2022-11-18 21:05:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2253 states have (on average 4.16156236129605) internal successors, (9376), 2369 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 9376 transitions. [2022-11-18 21:05:54,219 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 9376 transitions. Word has length 25 [2022-11-18 21:05:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:54,219 INFO L495 AbstractCegarLoop]: Abstraction has 2370 states and 9376 transitions. [2022-11-18 21:05:54,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 9376 transitions. [2022-11-18 21:05:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:54,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:54,220 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:54,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:54,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:54,427 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1205840722, now seen corresponding path program 1 times [2022-11-18 21:05:54,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:54,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037604976] [2022-11-18 21:05:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:54,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:54,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:54,429 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:54,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-18 21:05:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:55,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 21:05:55,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:55,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:55,300 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 21:05:55,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 21:05:55,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:55,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-11-18 21:05:55,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:55,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:05:55,818 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:05:55,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:05:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:05:56,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:56,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:05:56,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037604976] [2022-11-18 21:05:56,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037604976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:56,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:56,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:56,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131793008] [2022-11-18 21:05:56,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:56,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:56,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:05:56,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:56,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:56,336 INFO L87 Difference]: Start difference. First operand 2370 states and 9376 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:56,833 INFO L93 Difference]: Finished difference Result 2370 states and 9375 transitions. [2022-11-18 21:05:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:05:56,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:05:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:56,840 INFO L225 Difference]: With dead ends: 2370 [2022-11-18 21:05:56,840 INFO L226 Difference]: Without dead ends: 2370 [2022-11-18 21:05:56,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:56,841 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:56,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-11-18 21:05:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-11-18 21:05:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2370. [2022-11-18 21:05:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2253 states have (on average 4.161118508655126) internal successors, (9375), 2369 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 9375 transitions. [2022-11-18 21:05:56,913 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 9375 transitions. Word has length 25 [2022-11-18 21:05:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:56,913 INFO L495 AbstractCegarLoop]: Abstraction has 2370 states and 9375 transitions. [2022-11-18 21:05:56,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 9375 transitions. [2022-11-18 21:05:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:05:56,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:56,914 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:56,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:57,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:57,114 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:05:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1205839390, now seen corresponding path program 1 times [2022-11-18 21:05:57,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:05:57,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945092000] [2022-11-18 21:05:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:57,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:05:57,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:05:57,116 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:05:57,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-18 21:05:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:05:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:57,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:57,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:57,820 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-18 21:05:57,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-18 21:05:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:58,368 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-18 21:05:58,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-18 21:05:59,596 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-18 21:05:59,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-18 21:06:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:00,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:00,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:00,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945092000] [2022-11-18 21:06:00,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945092000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:00,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:00,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:06:00,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382306286] [2022-11-18 21:06:00,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:06:00,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:00,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:06:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:06:00,426 INFO L87 Difference]: Start difference. First operand 2370 states and 9375 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:00,659 INFO L93 Difference]: Finished difference Result 2371 states and 9378 transitions. [2022-11-18 21:06:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:06:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:06:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:00,668 INFO L225 Difference]: With dead ends: 2371 [2022-11-18 21:06:00,668 INFO L226 Difference]: Without dead ends: 2371 [2022-11-18 21:06:00,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:06:00,669 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:00,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-11-18 21:06:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2022-11-18 21:06:00,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2371. [2022-11-18 21:06:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2254 states have (on average 4.160603371783496) internal successors, (9378), 2370 states have internal predecessors, (9378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 9378 transitions. [2022-11-18 21:06:00,731 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 9378 transitions. Word has length 25 [2022-11-18 21:06:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:00,731 INFO L495 AbstractCegarLoop]: Abstraction has 2371 states and 9378 transitions. [2022-11-18 21:06:00,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 9378 transitions. [2022-11-18 21:06:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:06:00,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:00,733 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:00,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:00,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:00,945 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:00,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1205839389, now seen corresponding path program 1 times [2022-11-18 21:06:00,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:00,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60363908] [2022-11-18 21:06:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:00,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:00,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:00,947 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:00,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-18 21:06:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:06:01,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:01,809 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 21:06:01,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 21:06:01,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 494 [2022-11-18 21:06:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:02,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:06:02,269 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:06:02,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:06:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:02,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:02,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60363908] [2022-11-18 21:06:02,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60363908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:02,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:02,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:06:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819792574] [2022-11-18 21:06:02,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:02,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:06:02,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:06:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:06:02,791 INFO L87 Difference]: Start difference. First operand 2371 states and 9378 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:03,259 INFO L93 Difference]: Finished difference Result 2371 states and 9377 transitions. [2022-11-18 21:06:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:06:03,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:06:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:03,268 INFO L225 Difference]: With dead ends: 2371 [2022-11-18 21:06:03,268 INFO L226 Difference]: Without dead ends: 2371 [2022-11-18 21:06:03,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:03,269 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:03,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-11-18 21:06:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2022-11-18 21:06:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2371. [2022-11-18 21:06:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2254 states have (on average 4.160159716060337) internal successors, (9377), 2370 states have internal predecessors, (9377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 9377 transitions. [2022-11-18 21:06:03,314 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 9377 transitions. Word has length 25 [2022-11-18 21:06:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:03,315 INFO L495 AbstractCegarLoop]: Abstraction has 2371 states and 9377 transitions. [2022-11-18 21:06:03,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 9377 transitions. [2022-11-18 21:06:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:06:03,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:03,316 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:03,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:03,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:03,522 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:03,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:03,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1205939318, now seen corresponding path program 1 times [2022-11-18 21:06:03,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:03,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875004880] [2022-11-18 21:06:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:03,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:03,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:03,524 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:03,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-18 21:06:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 21:06:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:04,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:04,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:04,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875004880] [2022-11-18 21:06:04,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875004880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:04,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:04,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:06:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289794316] [2022-11-18 21:06:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:04,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:06:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:06:04,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:06:04,187 INFO L87 Difference]: Start difference. First operand 2371 states and 9377 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:04,544 INFO L93 Difference]: Finished difference Result 1916 states and 7352 transitions. [2022-11-18 21:06:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:06:04,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:06:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:04,550 INFO L225 Difference]: With dead ends: 1916 [2022-11-18 21:06:04,550 INFO L226 Difference]: Without dead ends: 1916 [2022-11-18 21:06:04,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:06:04,551 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:04,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:06:04,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-11-18 21:06:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1916. [2022-11-18 21:06:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1826 states have (on average 4.026286966046002) internal successors, (7352), 1915 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 7352 transitions. [2022-11-18 21:06:04,580 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 7352 transitions. Word has length 25 [2022-11-18 21:06:04,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:04,581 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 7352 transitions. [2022-11-18 21:06:04,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 7352 transitions. [2022-11-18 21:06:04,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:06:04,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:04,581 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:04,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:04,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:04,782 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:04,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1205939316, now seen corresponding path program 1 times [2022-11-18 21:06:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:04,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434179710] [2022-11-18 21:06:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:04,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:04,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:04,783 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:04,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-18 21:06:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:06:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:05,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:05,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434179710] [2022-11-18 21:06:05,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434179710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:05,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:05,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:06:05,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044318749] [2022-11-18 21:06:05,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:05,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:06:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:06:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:06:05,309 INFO L87 Difference]: Start difference. First operand 1916 states and 7352 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:05,625 INFO L93 Difference]: Finished difference Result 1461 states and 5327 transitions. [2022-11-18 21:06:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:06:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:06:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:05,630 INFO L225 Difference]: With dead ends: 1461 [2022-11-18 21:06:05,630 INFO L226 Difference]: Without dead ends: 1461 [2022-11-18 21:06:05,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:06:05,631 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:05,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:06:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-11-18 21:06:05,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1461. [2022-11-18 21:06:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1398 states have (on average 3.8104434907010014) internal successors, (5327), 1460 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 5327 transitions. [2022-11-18 21:06:05,662 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 5327 transitions. Word has length 25 [2022-11-18 21:06:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:05,662 INFO L495 AbstractCegarLoop]: Abstraction has 1461 states and 5327 transitions. [2022-11-18 21:06:05,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 5327 transitions. [2022-11-18 21:06:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:06:05,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:05,663 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:05,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:05,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:05,863 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1106290361, now seen corresponding path program 3 times [2022-11-18 21:06:05,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:05,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251504288] [2022-11-18 21:06:05,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:06:05,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:05,865 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:05,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-18 21:06:06,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 21:06:06,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:06:06,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:06,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:06,371 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:06:06,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:06:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:06,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:06:06,770 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:06:06,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:06:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:07,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:07,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251504288] [2022-11-18 21:06:07,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251504288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:07,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:07,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:06:07,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517640339] [2022-11-18 21:06:07,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:07,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:06:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:06:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:06:07,107 INFO L87 Difference]: Start difference. First operand 1461 states and 5327 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:07,518 INFO L93 Difference]: Finished difference Result 1460 states and 5324 transitions. [2022-11-18 21:06:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:06:07,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:06:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:07,543 INFO L225 Difference]: With dead ends: 1460 [2022-11-18 21:06:07,543 INFO L226 Difference]: Without dead ends: 1460 [2022-11-18 21:06:07,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:07,544 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:07,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-11-18 21:06:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-11-18 21:06:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1459. [2022-11-18 21:06:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1396 states have (on average 3.811604584527221) internal successors, (5321), 1458 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 5321 transitions. [2022-11-18 21:06:07,569 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 5321 transitions. Word has length 25 [2022-11-18 21:06:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:07,569 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 5321 transitions. [2022-11-18 21:06:07,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 5321 transitions. [2022-11-18 21:06:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:06:07,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:07,570 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:07,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:07,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:07,770 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1106154957, now seen corresponding path program 2 times [2022-11-18 21:06:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:07,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133329207] [2022-11-18 21:06:07,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:06:07,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:07,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:07,773 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:07,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-18 21:06:08,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 21:06:08,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:06:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:08,279 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 21:06:08,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-18 21:06:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:08,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-18 21:06:08,715 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:06:08,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-18 21:06:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 21:06:09,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:09,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:09,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133329207] [2022-11-18 21:06:09,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133329207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:09,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:09,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:06:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657184379] [2022-11-18 21:06:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:09,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:06:09,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:06:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:09,229 INFO L87 Difference]: Start difference. First operand 1459 states and 5321 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:09,533 INFO L93 Difference]: Finished difference Result 1453 states and 5307 transitions. [2022-11-18 21:06:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:06:09,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:06:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:09,537 INFO L225 Difference]: With dead ends: 1453 [2022-11-18 21:06:09,537 INFO L226 Difference]: Without dead ends: 1453 [2022-11-18 21:06:09,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:09,538 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:09,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-11-18 21:06:09,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-11-18 21:06:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1453. [2022-11-18 21:06:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1390 states have (on average 3.8179856115107915) internal successors, (5307), 1452 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5307 transitions. [2022-11-18 21:06:09,573 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5307 transitions. Word has length 25 [2022-11-18 21:06:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:09,573 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 5307 transitions. [2022-11-18 21:06:09,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5307 transitions. [2022-11-18 21:06:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:06:09,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:09,574 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:09,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:09,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:09,774 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:09,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1106152911, now seen corresponding path program 1 times [2022-11-18 21:06:09,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:09,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620166922] [2022-11-18 21:06:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:09,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:09,777 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:09,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-18 21:06:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:06:10,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:10,575 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 21:06:10,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-18 21:06:11,211 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-18 21:06:11,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-18 21:06:11,770 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-18 21:06:11,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 67 [2022-11-18 21:06:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:13,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:13,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620166922] [2022-11-18 21:06:13,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620166922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:13,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:13,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:06:13,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586364905] [2022-11-18 21:06:13,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:13,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:06:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:13,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:06:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:06:13,615 INFO L87 Difference]: Start difference. First operand 1453 states and 5307 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:13,813 INFO L93 Difference]: Finished difference Result 1452 states and 5306 transitions. [2022-11-18 21:06:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:06:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 25 [2022-11-18 21:06:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:13,819 INFO L225 Difference]: With dead ends: 1452 [2022-11-18 21:06:13,819 INFO L226 Difference]: Without dead ends: 1452 [2022-11-18 21:06:13,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:06:13,820 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:13,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-11-18 21:06:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2022-11-18 21:06:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1452. [2022-11-18 21:06:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1390 states have (on average 3.8172661870503597) internal successors, (5306), 1451 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 5306 transitions. [2022-11-18 21:06:13,845 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 5306 transitions. Word has length 25 [2022-11-18 21:06:13,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:13,846 INFO L495 AbstractCegarLoop]: Abstraction has 1452 states and 5306 transitions. [2022-11-18 21:06:13,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 5306 transitions. [2022-11-18 21:06:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:06:13,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:13,846 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:13,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:14,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:14,047 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1659113139, now seen corresponding path program 1 times [2022-11-18 21:06:14,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:14,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178036374] [2022-11-18 21:06:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:14,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:14,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:14,048 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:14,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-18 21:06:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:06:14,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:14,871 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 21:06:14,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-18 21:06:15,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:15,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-18 21:06:15,289 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:06:15,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-18 21:06:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:15,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:15,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:15,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178036374] [2022-11-18 21:06:15,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178036374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:15,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:15,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:06:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858727457] [2022-11-18 21:06:15,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:15,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:06:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:15,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:06:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:15,834 INFO L87 Difference]: Start difference. First operand 1452 states and 5306 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:16,121 INFO L93 Difference]: Finished difference Result 1455 states and 5320 transitions. [2022-11-18 21:06:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:06:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:06:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:16,125 INFO L225 Difference]: With dead ends: 1455 [2022-11-18 21:06:16,125 INFO L226 Difference]: Without dead ends: 1455 [2022-11-18 21:06:16,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:16,125 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:16,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-11-18 21:06:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2022-11-18 21:06:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1453. [2022-11-18 21:06:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1391 states have (on average 3.8181164629762763) internal successors, (5311), 1452 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5311 transitions. [2022-11-18 21:06:16,145 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5311 transitions. Word has length 26 [2022-11-18 21:06:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:16,145 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 5311 transitions. [2022-11-18 21:06:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5311 transitions. [2022-11-18 21:06:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:06:16,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:16,146 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:16,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:16,346 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1659113140, now seen corresponding path program 1 times [2022-11-18 21:06:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:16,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756383181] [2022-11-18 21:06:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:16,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:16,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:16,348 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:16,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-18 21:06:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:17,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:06:17,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:17,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:17,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:17,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:17,234 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:06:17,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:06:17,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:06:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:17,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:06:17,646 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:06:17,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:06:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:18,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:18,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:18,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756383181] [2022-11-18 21:06:18,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756383181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:18,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:18,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:06:18,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485391484] [2022-11-18 21:06:18,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:18,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:06:18,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:06:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:06:18,210 INFO L87 Difference]: Start difference. First operand 1453 states and 5311 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:18,594 INFO L93 Difference]: Finished difference Result 1454 states and 5315 transitions. [2022-11-18 21:06:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:06:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:06:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:18,599 INFO L225 Difference]: With dead ends: 1454 [2022-11-18 21:06:18,600 INFO L226 Difference]: Without dead ends: 1454 [2022-11-18 21:06:18,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:18,600 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:18,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-18 21:06:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-11-18 21:06:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2022-11-18 21:06:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1392 states have (on average 3.8182471264367814) internal successors, (5315), 1453 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 5315 transitions. [2022-11-18 21:06:18,627 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 5315 transitions. Word has length 26 [2022-11-18 21:06:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:18,627 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 5315 transitions. [2022-11-18 21:06:18,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 5315 transitions. [2022-11-18 21:06:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:06:18,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:18,628 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:18,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:18,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:18,829 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1659112457, now seen corresponding path program 1 times [2022-11-18 21:06:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:18,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465235266] [2022-11-18 21:06:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:18,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:18,830 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:18,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-18 21:06:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:19,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:06:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:19,635 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:06:19,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:06:19,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:19,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:06:20,039 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:06:20,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:06:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:20,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:20,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:20,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465235266] [2022-11-18 21:06:20,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465235266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:20,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:20,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:06:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891174535] [2022-11-18 21:06:20,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:06:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:06:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:06:20,381 INFO L87 Difference]: Start difference. First operand 1454 states and 5315 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:20,750 INFO L93 Difference]: Finished difference Result 1456 states and 5323 transitions. [2022-11-18 21:06:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:06:20,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:06:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:20,755 INFO L225 Difference]: With dead ends: 1456 [2022-11-18 21:06:20,755 INFO L226 Difference]: Without dead ends: 1456 [2022-11-18 21:06:20,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:20,758 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:20,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-11-18 21:06:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-11-18 21:06:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1455. [2022-11-18 21:06:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1393 states have (on average 3.819095477386935) internal successors, (5320), 1454 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 5320 transitions. [2022-11-18 21:06:20,842 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 5320 transitions. Word has length 26 [2022-11-18 21:06:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:20,842 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 5320 transitions. [2022-11-18 21:06:20,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 5320 transitions. [2022-11-18 21:06:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:06:20,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:20,843 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:20,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:21,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:21,043 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1659112458, now seen corresponding path program 1 times [2022-11-18 21:06:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:21,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462049758] [2022-11-18 21:06:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:21,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:21,045 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:21,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-18 21:06:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:06:21,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:21,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:21,956 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 21:06:21,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 21:06:21,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-11-18 21:06:22,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:22,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:06:22,434 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:06:22,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:06:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:23,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:23,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:23,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462049758] [2022-11-18 21:06:23,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462049758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:23,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:23,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:06:23,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808230677] [2022-11-18 21:06:23,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:23,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:06:23,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:23,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:06:23,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:06:23,024 INFO L87 Difference]: Start difference. First operand 1455 states and 5320 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:23,406 INFO L93 Difference]: Finished difference Result 1454 states and 5314 transitions. [2022-11-18 21:06:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:06:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:06:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:23,411 INFO L225 Difference]: With dead ends: 1454 [2022-11-18 21:06:23,411 INFO L226 Difference]: Without dead ends: 1454 [2022-11-18 21:06:23,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:23,412 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:23,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-18 21:06:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-11-18 21:06:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2022-11-18 21:06:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1392 states have (on average 3.817528735632184) internal successors, (5314), 1453 states have internal predecessors, (5314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 5314 transitions. [2022-11-18 21:06:23,441 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 5314 transitions. Word has length 26 [2022-11-18 21:06:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:23,441 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 5314 transitions. [2022-11-18 21:06:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 5314 transitions. [2022-11-18 21:06:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:06:23,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:23,442 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:23,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:23,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:23,642 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1659114472, now seen corresponding path program 1 times [2022-11-18 21:06:23,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:23,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025172693] [2022-11-18 21:06:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:23,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:23,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:23,644 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:23,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-18 21:06:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:06:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:24,459 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 21:06:24,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-18 21:06:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:24,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:06:24,795 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:06:24,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:06:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:25,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:25,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:25,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025172693] [2022-11-18 21:06:25,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025172693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:25,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:25,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:06:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931879961] [2022-11-18 21:06:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:06:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:06:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:06:25,067 INFO L87 Difference]: Start difference. First operand 1454 states and 5314 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:25,430 INFO L93 Difference]: Finished difference Result 1455 states and 5318 transitions. [2022-11-18 21:06:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:06:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:06:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:25,435 INFO L225 Difference]: With dead ends: 1455 [2022-11-18 21:06:25,435 INFO L226 Difference]: Without dead ends: 1455 [2022-11-18 21:06:25,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:06:25,435 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:25,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-18 21:06:25,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2022-11-18 21:06:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1455. [2022-11-18 21:06:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1393 states have (on average 3.8176597272074657) internal successors, (5318), 1454 states have internal predecessors, (5318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 5318 transitions. [2022-11-18 21:06:25,460 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 5318 transitions. Word has length 26 [2022-11-18 21:06:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:25,460 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 5318 transitions. [2022-11-18 21:06:25,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 5318 transitions. [2022-11-18 21:06:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:06:25,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:25,461 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:25,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:25,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:25,661 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:25,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1659114473, now seen corresponding path program 1 times [2022-11-18 21:06:25,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:25,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631804753] [2022-11-18 21:06:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:25,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:25,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:25,663 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:25,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-18 21:06:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:06:26,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:26,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:26,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:26,559 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:06:26,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:06:26,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:06:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:26,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:06:26,968 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:06:26,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:06:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:06:27,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:27,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:27,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631804753] [2022-11-18 21:06:27,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631804753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:27,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:27,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:06:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625545208] [2022-11-18 21:06:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:27,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:06:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:06:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:06:27,578 INFO L87 Difference]: Start difference. First operand 1455 states and 5318 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:27,975 INFO L93 Difference]: Finished difference Result 1455 states and 5317 transitions. [2022-11-18 21:06:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:06:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:06:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:27,980 INFO L225 Difference]: With dead ends: 1455 [2022-11-18 21:06:27,980 INFO L226 Difference]: Without dead ends: 1455 [2022-11-18 21:06:27,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:06:27,981 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:27,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-18 21:06:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2022-11-18 21:06:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1455. [2022-11-18 21:06:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1393 states have (on average 3.8169418521177314) internal successors, (5317), 1454 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 5317 transitions. [2022-11-18 21:06:28,007 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 5317 transitions. Word has length 26 [2022-11-18 21:06:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:28,007 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 5317 transitions. [2022-11-18 21:06:28,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 5317 transitions. [2022-11-18 21:06:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:06:28,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:28,008 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:28,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:28,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:28,208 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:06:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:28,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1659114503, now seen corresponding path program 1 times [2022-11-18 21:06:28,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:28,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655670548] [2022-11-18 21:06:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:28,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:28,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:28,211 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:28,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-18 21:06:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 21:06:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:28,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:28,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:29,043 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-18 21:06:29,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-18 21:06:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:29,657 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-18 21:06:29,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-18 21:06:36,361 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2022-11-18 21:06:36,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 166 [2022-11-18 21:13:16,509 WARN L233 SmtUtils]: Spent 4.79m on a formula simplification. DAG size of input: 1015 DAG size of output: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:13:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:17,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:17,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:17,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655670548] [2022-11-18 21:13:17,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655670548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:17,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:17,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:13:17,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131410038] [2022-11-18 21:13:17,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:17,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:13:17,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:17,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:13:17,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-18 21:13:17,438 INFO L87 Difference]: Start difference. First operand 1455 states and 5317 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:17,690 INFO L93 Difference]: Finished difference Result 1456 states and 5321 transitions. [2022-11-18 21:13:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:13:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:17,694 INFO L225 Difference]: With dead ends: 1456 [2022-11-18 21:13:17,694 INFO L226 Difference]: Without dead ends: 1456 [2022-11-18 21:13:17,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 296.5s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-18 21:13:17,695 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:17,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-11-18 21:13:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-11-18 21:13:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1456. [2022-11-18 21:13:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1394 states have (on average 3.817073170731707) internal successors, (5321), 1455 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5321 transitions. [2022-11-18 21:13:17,721 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5321 transitions. Word has length 26 [2022-11-18 21:13:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:17,722 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 5321 transitions. [2022-11-18 21:13:17,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5321 transitions. [2022-11-18 21:13:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:17,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:17,723 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:17,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:17,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:17,924 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:17,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1659114504, now seen corresponding path program 1 times [2022-11-18 21:13:17,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:17,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549261038] [2022-11-18 21:13:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:17,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:17,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:17,925 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:17,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-18 21:13:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:13:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:18,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:18,792 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:13:18,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:13:18,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:13:18,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:18,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:13:19,294 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:13:19,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:13:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:20,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:20,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:20,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549261038] [2022-11-18 21:13:20,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549261038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:20,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:20,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:13:20,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196193830] [2022-11-18 21:13:20,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:20,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:13:20,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:20,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:13:20,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:13:20,019 INFO L87 Difference]: Start difference. First operand 1456 states and 5321 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:20,502 INFO L93 Difference]: Finished difference Result 1456 states and 5320 transitions. [2022-11-18 21:13:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:13:20,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:20,506 INFO L225 Difference]: With dead ends: 1456 [2022-11-18 21:13:20,506 INFO L226 Difference]: Without dead ends: 1456 [2022-11-18 21:13:20,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:13:20,507 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:20,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 69 Unchecked, 0.4s Time] [2022-11-18 21:13:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-11-18 21:13:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1456. [2022-11-18 21:13:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1394 states have (on average 3.8163558106169297) internal successors, (5320), 1455 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5320 transitions. [2022-11-18 21:13:20,538 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5320 transitions. Word has length 26 [2022-11-18 21:13:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:20,538 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 5320 transitions. [2022-11-18 21:13:20,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5320 transitions. [2022-11-18 21:13:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:20,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:20,539 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:20,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:20,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:20,749 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1658943197, now seen corresponding path program 2 times [2022-11-18 21:13:20,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:20,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591387208] [2022-11-18 21:13:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:13:20,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:20,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:20,751 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:20,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-18 21:13:21,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 21:13:21,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:13:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:13:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:21,413 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:13:21,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:13:21,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:21,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:13:21,926 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:13:21,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:13:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:22,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:22,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:22,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591387208] [2022-11-18 21:13:22,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591387208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:22,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:22,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:13:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594497526] [2022-11-18 21:13:22,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:22,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:13:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:13:22,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:13:22,363 INFO L87 Difference]: Start difference. First operand 1456 states and 5320 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:22,841 INFO L93 Difference]: Finished difference Result 1458 states and 5327 transitions. [2022-11-18 21:13:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:13:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:22,848 INFO L225 Difference]: With dead ends: 1458 [2022-11-18 21:13:22,849 INFO L226 Difference]: Without dead ends: 1458 [2022-11-18 21:13:22,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:13:22,850 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:22,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-11-18 21:13:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2022-11-18 21:13:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1457. [2022-11-18 21:13:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1395 states have (on average 3.8157706093189963) internal successors, (5323), 1456 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 5323 transitions. [2022-11-18 21:13:22,883 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 5323 transitions. Word has length 26 [2022-11-18 21:13:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:22,883 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 5323 transitions. [2022-11-18 21:13:22,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 5323 transitions. [2022-11-18 21:13:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:22,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:22,884 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:22,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:23,084 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1658944344, now seen corresponding path program 1 times [2022-11-18 21:13:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:23,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633720034] [2022-11-18 21:13:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:23,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:23,087 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:23,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-18 21:13:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:13:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:24,006 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 21:13:24,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-18 21:13:24,182 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:13:24,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-18 21:13:24,411 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:13:24,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-18 21:13:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:25,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:25,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633720034] [2022-11-18 21:13:25,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633720034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:25,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:25,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:13:25,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97350766] [2022-11-18 21:13:25,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:25,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:13:25,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:13:25,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:13:25,079 INFO L87 Difference]: Start difference. First operand 1457 states and 5323 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:25,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:25,437 INFO L93 Difference]: Finished difference Result 1511 states and 5503 transitions. [2022-11-18 21:13:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:13:25,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:25,443 INFO L225 Difference]: With dead ends: 1511 [2022-11-18 21:13:25,443 INFO L226 Difference]: Without dead ends: 1511 [2022-11-18 21:13:25,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:13:25,444 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:25,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-18 21:13:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2022-11-18 21:13:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1477. [2022-11-18 21:13:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1415 states have (on average 3.8247349823321555) internal successors, (5412), 1476 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5412 transitions. [2022-11-18 21:13:25,479 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5412 transitions. Word has length 26 [2022-11-18 21:13:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:25,479 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 5412 transitions. [2022-11-18 21:13:25,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5412 transitions. [2022-11-18 21:13:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:25,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:25,480 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:25,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:25,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:25,695 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1658944345, now seen corresponding path program 1 times [2022-11-18 21:13:25,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:25,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013079002] [2022-11-18 21:13:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:25,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:25,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:25,697 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:25,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-18 21:13:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:13:26,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:26,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:26,625 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:13:26,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:13:26,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:13:26,802 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:13:26,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:13:27,164 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-18 21:13:27,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-18 21:13:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:27,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:27,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:27,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013079002] [2022-11-18 21:13:27,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013079002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:27,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:27,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:13:27,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854924631] [2022-11-18 21:13:27,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:27,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:13:27,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:13:27,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:13:27,820 INFO L87 Difference]: Start difference. First operand 1477 states and 5412 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:28,359 INFO L93 Difference]: Finished difference Result 1470 states and 5374 transitions. [2022-11-18 21:13:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:13:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:28,365 INFO L225 Difference]: With dead ends: 1470 [2022-11-18 21:13:28,365 INFO L226 Difference]: Without dead ends: 1470 [2022-11-18 21:13:28,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:13:28,365 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:28,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-11-18 21:13:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-11-18 21:13:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1470. [2022-11-18 21:13:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1408 states have (on average 3.8167613636363638) internal successors, (5374), 1469 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 5374 transitions. [2022-11-18 21:13:28,397 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 5374 transitions. Word has length 26 [2022-11-18 21:13:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:28,397 INFO L495 AbstractCegarLoop]: Abstraction has 1470 states and 5374 transitions. [2022-11-18 21:13:28,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 5374 transitions. [2022-11-18 21:13:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:28,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:28,398 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:28,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:28,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:28,598 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:28,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1666007694, now seen corresponding path program 2 times [2022-11-18 21:13:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:28,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680738159] [2022-11-18 21:13:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:13:28,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:28,600 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:28,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-18 21:13:29,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 21:13:29,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:13:29,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:13:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:29,256 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 21:13:29,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-18 21:13:29,436 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:13:29,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-18 21:13:29,663 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:13:29,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-18 21:13:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:30,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:30,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:30,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680738159] [2022-11-18 21:13:30,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680738159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:30,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:30,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:13:30,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519740240] [2022-11-18 21:13:30,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:30,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:13:30,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:13:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:13:30,529 INFO L87 Difference]: Start difference. First operand 1470 states and 5374 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:31,107 INFO L93 Difference]: Finished difference Result 3179 states and 11957 transitions. [2022-11-18 21:13:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:13:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:31,118 INFO L225 Difference]: With dead ends: 3179 [2022-11-18 21:13:31,119 INFO L226 Difference]: Without dead ends: 3179 [2022-11-18 21:13:31,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:13:31,119 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:31,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 90 Unchecked, 0.6s Time] [2022-11-18 21:13:31,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2022-11-18 21:13:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 1675. [2022-11-18 21:13:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1613 states have (on average 3.884686918784873) internal successors, (6266), 1674 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 6266 transitions. [2022-11-18 21:13:31,178 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 6266 transitions. Word has length 26 [2022-11-18 21:13:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:31,178 INFO L495 AbstractCegarLoop]: Abstraction has 1675 states and 6266 transitions. [2022-11-18 21:13:31,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 6266 transitions. [2022-11-18 21:13:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:31,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:31,179 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:31,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:31,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:31,380 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:31,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1666439214, now seen corresponding path program 3 times [2022-11-18 21:13:31,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:31,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449901245] [2022-11-18 21:13:31,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:13:31,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:31,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:31,382 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:31,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-18 21:13:31,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 21:13:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:13:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 21:13:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:32,152 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 21:13:32,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 21:13:32,326 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:13:32,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-18 21:13:32,566 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:13:32,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-18 21:13:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:33,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:33,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:33,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449901245] [2022-11-18 21:13:33,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449901245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:33,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:33,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:13:33,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443267373] [2022-11-18 21:13:33,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:33,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:13:33,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:13:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:13:33,212 INFO L87 Difference]: Start difference. First operand 1675 states and 6266 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:34,214 INFO L93 Difference]: Finished difference Result 3753 states and 14268 transitions. [2022-11-18 21:13:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:13:34,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:34,226 INFO L225 Difference]: With dead ends: 3753 [2022-11-18 21:13:34,226 INFO L226 Difference]: Without dead ends: 3753 [2022-11-18 21:13:34,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:13:34,226 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:34,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 182 Unchecked, 0.9s Time] [2022-11-18 21:13:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-11-18 21:13:34,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 1677. [2022-11-18 21:13:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1615 states have (on average 3.873065015479876) internal successors, (6255), 1676 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 6255 transitions. [2022-11-18 21:13:34,274 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 6255 transitions. Word has length 26 [2022-11-18 21:13:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:34,274 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 6255 transitions. [2022-11-18 21:13:34,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 6255 transitions. [2022-11-18 21:13:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:34,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:34,275 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:34,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-18 21:13:34,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:34,476 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1273647669, now seen corresponding path program 2 times [2022-11-18 21:13:34,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:34,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553510341] [2022-11-18 21:13:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:13:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:34,478 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:34,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-18 21:13:34,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 21:13:34,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:13:34,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:13:34,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:34,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:35,173 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:13:35,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:13:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:35,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:13:35,686 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:13:35,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:13:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:36,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:36,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:36,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553510341] [2022-11-18 21:13:36,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553510341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:36,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:36,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:13:36,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95890265] [2022-11-18 21:13:36,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:13:36,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:36,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:13:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:13:36,136 INFO L87 Difference]: Start difference. First operand 1677 states and 6255 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:36,659 INFO L93 Difference]: Finished difference Result 1677 states and 6254 transitions. [2022-11-18 21:13:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:13:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:36,664 INFO L225 Difference]: With dead ends: 1677 [2022-11-18 21:13:36,665 INFO L226 Difference]: Without dead ends: 1677 [2022-11-18 21:13:36,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:13:36,665 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:36,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-11-18 21:13:36,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-11-18 21:13:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1676. [2022-11-18 21:13:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1614 states have (on average 3.872366790582404) internal successors, (6250), 1675 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 6250 transitions. [2022-11-18 21:13:36,706 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 6250 transitions. Word has length 26 [2022-11-18 21:13:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:36,706 INFO L495 AbstractCegarLoop]: Abstraction has 1676 states and 6250 transitions. [2022-11-18 21:13:36,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 6250 transitions. [2022-11-18 21:13:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:36,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:36,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:36,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:36,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:36,922 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1273648905, now seen corresponding path program 1 times [2022-11-18 21:13:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:36,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732171393] [2022-11-18 21:13:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:36,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:36,925 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:36,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-18 21:13:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 21:13:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:37,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:13:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:37,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:38,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732171393] [2022-11-18 21:13:38,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732171393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:13:38,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:13:38,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-18 21:13:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621872117] [2022-11-18 21:13:38,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:13:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:13:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:13:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:13:38,783 INFO L87 Difference]: Start difference. First operand 1676 states and 6250 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:41,612 INFO L93 Difference]: Finished difference Result 4950 states and 17906 transitions. [2022-11-18 21:13:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:13:41,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 21:13:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:41,627 INFO L225 Difference]: With dead ends: 4950 [2022-11-18 21:13:41,627 INFO L226 Difference]: Without dead ends: 4950 [2022-11-18 21:13:41,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:13:41,628 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 410 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:41,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 0 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 21:13:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-11-18 21:13:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3080. [2022-11-18 21:13:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3018 states have (on average 4.236911862160371) internal successors, (12787), 3079 states have internal predecessors, (12787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 12787 transitions. [2022-11-18 21:13:41,733 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 12787 transitions. Word has length 26 [2022-11-18 21:13:41,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:41,734 INFO L495 AbstractCegarLoop]: Abstraction has 3080 states and 12787 transitions. [2022-11-18 21:13:41,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 12787 transitions. [2022-11-18 21:13:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:41,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:41,735 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:41,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:41,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:41,936 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1273648971, now seen corresponding path program 1 times [2022-11-18 21:13:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:41,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150754663] [2022-11-18 21:13:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:41,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:41,939 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:41,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-18 21:13:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:42,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:13:42,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:42,976 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:13:42,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:13:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:43,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:13:43,481 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:13:43,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:13:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:43,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:43,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:43,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150754663] [2022-11-18 21:13:43,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150754663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:43,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:43,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:13:43,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905853805] [2022-11-18 21:13:43,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:43,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:13:43,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:13:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:13:43,932 INFO L87 Difference]: Start difference. First operand 3080 states and 12787 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:44,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:44,410 INFO L93 Difference]: Finished difference Result 3079 states and 12782 transitions. [2022-11-18 21:13:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:13:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:44,421 INFO L225 Difference]: With dead ends: 3079 [2022-11-18 21:13:44,421 INFO L226 Difference]: Without dead ends: 3079 [2022-11-18 21:13:44,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:13:44,422 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:44,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-11-18 21:13:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-11-18 21:13:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 3079. [2022-11-18 21:13:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3017 states have (on average 4.236658932714617) internal successors, (12782), 3078 states have internal predecessors, (12782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 12782 transitions. [2022-11-18 21:13:44,483 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 12782 transitions. Word has length 26 [2022-11-18 21:13:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:44,483 INFO L495 AbstractCegarLoop]: Abstraction has 3079 states and 12782 transitions. [2022-11-18 21:13:44,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 12782 transitions. [2022-11-18 21:13:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:44,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:44,484 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:44,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:44,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:44,704 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:44,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1273648972, now seen corresponding path program 1 times [2022-11-18 21:13:44,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:44,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196020578] [2022-11-18 21:13:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:44,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:44,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:44,706 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:44,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-18 21:13:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:13:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:45,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:45,867 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 21:13:45,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 21:13:45,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 420 [2022-11-18 21:13:46,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:46,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:13:46,496 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:13:46,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:13:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:47,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:47,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:47,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196020578] [2022-11-18 21:13:47,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196020578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:47,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:47,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:13:47,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224809477] [2022-11-18 21:13:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:47,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:13:47,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:13:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:13:47,291 INFO L87 Difference]: Start difference. First operand 3079 states and 12782 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:47,754 INFO L93 Difference]: Finished difference Result 3072 states and 12752 transitions. [2022-11-18 21:13:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:13:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:47,765 INFO L225 Difference]: With dead ends: 3072 [2022-11-18 21:13:47,765 INFO L226 Difference]: Without dead ends: 3072 [2022-11-18 21:13:47,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:13:47,765 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:47,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 70 Unchecked, 0.4s Time] [2022-11-18 21:13:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-11-18 21:13:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3072. [2022-11-18 21:13:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 3010 states have (on average 4.236544850498339) internal successors, (12752), 3071 states have internal predecessors, (12752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 12752 transitions. [2022-11-18 21:13:47,830 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 12752 transitions. Word has length 26 [2022-11-18 21:13:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:47,830 INFO L495 AbstractCegarLoop]: Abstraction has 3072 states and 12752 transitions. [2022-11-18 21:13:47,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 12752 transitions. [2022-11-18 21:13:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:47,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:47,831 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:47,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-18 21:13:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:48,034 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1273648830, now seen corresponding path program 1 times [2022-11-18 21:13:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:48,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54398075] [2022-11-18 21:13:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:48,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:48,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:48,036 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:48,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-18 21:13:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 21:13:48,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:49,207 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 21:13:49,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-18 21:13:49,537 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 21:13:49,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 21:13:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:13:49,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:13:49,813 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:13:49,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 21:13:49,957 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:13:49,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:13:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:50,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:53,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:53,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54398075] [2022-11-18 21:13:53,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54398075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:13:53,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:13:53,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-18 21:13:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683207845] [2022-11-18 21:13:53,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:13:53,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:13:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:13:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:13:53,938 INFO L87 Difference]: Start difference. First operand 3072 states and 12752 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:56,694 INFO L93 Difference]: Finished difference Result 4086 states and 14656 transitions. [2022-11-18 21:13:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:13:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 21:13:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:56,707 INFO L225 Difference]: With dead ends: 4086 [2022-11-18 21:13:56,707 INFO L226 Difference]: Without dead ends: 4086 [2022-11-18 21:13:56,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:13:56,708 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 364 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:56,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 248 Invalid, 0 Unknown, 1 Unchecked, 2.2s Time] [2022-11-18 21:13:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2022-11-18 21:13:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3072. [2022-11-18 21:13:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 3010 states have (on average 4.003654485049834) internal successors, (12051), 3071 states have internal predecessors, (12051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 12051 transitions. [2022-11-18 21:13:56,775 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 12051 transitions. Word has length 26 [2022-11-18 21:13:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:56,775 INFO L495 AbstractCegarLoop]: Abstraction has 3072 states and 12051 transitions. [2022-11-18 21:13:56,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 12051 transitions. [2022-11-18 21:13:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:56,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:56,776 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:56,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:56,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:56,976 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:56,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1270595137, now seen corresponding path program 1 times [2022-11-18 21:13:56,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:56,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549756329] [2022-11-18 21:13:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:56,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:56,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:56,978 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:56,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-18 21:13:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 21:13:57,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:57,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:13:57,911 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:13:57,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:13:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:13:58,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:13:58,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:13:58,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549756329] [2022-11-18 21:13:58,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549756329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:13:58,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:13:58,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:13:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718301661] [2022-11-18 21:13:58,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:13:58,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:13:58,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:13:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:13:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:13:58,196 INFO L87 Difference]: Start difference. First operand 3072 states and 12051 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:59,114 INFO L93 Difference]: Finished difference Result 4352 states and 17117 transitions. [2022-11-18 21:13:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:13:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:13:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:59,129 INFO L225 Difference]: With dead ends: 4352 [2022-11-18 21:13:59,129 INFO L226 Difference]: Without dead ends: 4352 [2022-11-18 21:13:59,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:13:59,129 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:59,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 21:13:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2022-11-18 21:13:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3498. [2022-11-18 21:13:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3436 states have (on average 4.2465075669383) internal successors, (14591), 3497 states have internal predecessors, (14591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 14591 transitions. [2022-11-18 21:13:59,204 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 14591 transitions. Word has length 26 [2022-11-18 21:13:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:59,204 INFO L495 AbstractCegarLoop]: Abstraction has 3498 states and 14591 transitions. [2022-11-18 21:13:59,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:13:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 14591 transitions. [2022-11-18 21:13:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:13:59,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:59,205 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:59,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-18 21:13:59,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:59,425 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:13:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1270595299, now seen corresponding path program 1 times [2022-11-18 21:13:59,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:13:59,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894943977] [2022-11-18 21:13:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:59,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:13:59,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:13:59,427 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:13:59,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-18 21:14:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:14:00,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 21:14:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:00,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:14:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:14:00,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:14:00,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:14:00,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894943977] [2022-11-18 21:14:00,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894943977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:14:00,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:14:00,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:14:00,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958461708] [2022-11-18 21:14:00,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:14:00,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:14:00,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:14:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:14:00,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:14:00,379 INFO L87 Difference]: Start difference. First operand 3498 states and 14591 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:01,255 INFO L93 Difference]: Finished difference Result 3926 states and 15429 transitions. [2022-11-18 21:14:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:14:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:14:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:01,268 INFO L225 Difference]: With dead ends: 3926 [2022-11-18 21:14:01,303 INFO L226 Difference]: Without dead ends: 3926 [2022-11-18 21:14:01,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:14:01,303 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:01,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 21:14:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2022-11-18 21:14:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3498. [2022-11-18 21:14:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3436 states have (on average 4.122526193247963) internal successors, (14165), 3497 states have internal predecessors, (14165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 14165 transitions. [2022-11-18 21:14:01,380 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 14165 transitions. Word has length 26 [2022-11-18 21:14:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:01,381 INFO L495 AbstractCegarLoop]: Abstraction has 3498 states and 14165 transitions. [2022-11-18 21:14:01,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 14165 transitions. [2022-11-18 21:14:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:14:01,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:01,382 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:01,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-18 21:14:01,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:14:01,582 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:14:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:01,583 INFO L85 PathProgramCache]: Analyzing trace with hash 64741471, now seen corresponding path program 3 times [2022-11-18 21:14:01,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:14:01,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299822703] [2022-11-18 21:14:01,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:14:01,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:14:01,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:14:01,584 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:14:01,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-18 21:14:02,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 21:14:02,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:14:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:14:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:02,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:02,355 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-18 21:14:02,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-18 21:14:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:02,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:14:02,922 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 21:14:02,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 21:14:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:14:03,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:14:03,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:14:03,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299822703] [2022-11-18 21:14:03,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299822703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:14:03,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:14:03,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:14:03,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764324244] [2022-11-18 21:14:03,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:14:03,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:14:03,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:14:03,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:14:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:14:03,391 INFO L87 Difference]: Start difference. First operand 3498 states and 14165 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:03,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:03,934 INFO L93 Difference]: Finished difference Result 3688 states and 14896 transitions. [2022-11-18 21:14:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:14:03,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:14:03,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:03,947 INFO L225 Difference]: With dead ends: 3688 [2022-11-18 21:14:03,948 INFO L226 Difference]: Without dead ends: 3688 [2022-11-18 21:14:03,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:14:03,948 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:03,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2022-11-18 21:14:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3688 states. [2022-11-18 21:14:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3688 to 3496. [2022-11-18 21:14:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3434 states have (on average 4.122597553873034) internal successors, (14157), 3495 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 14157 transitions. [2022-11-18 21:14:04,054 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 14157 transitions. Word has length 26 [2022-11-18 21:14:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:04,055 INFO L495 AbstractCegarLoop]: Abstraction has 3496 states and 14157 transitions. [2022-11-18 21:14:04,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 14157 transitions. [2022-11-18 21:14:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:14:04,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:04,056 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:04,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-18 21:14:04,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:14:04,256 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:14:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash 64742618, now seen corresponding path program 4 times [2022-11-18 21:14:04,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:14:04,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269378631] [2022-11-18 21:14:04,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:14:04,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:14:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:14:04,258 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:14:04,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-18 21:14:05,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:14:05,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:14:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:14:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:05,325 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 21:14:05,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-18 21:14:05,508 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:14:05,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-18 21:14:05,742 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:14:05,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-18 21:14:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:14:06,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:14:06,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:14:06,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269378631] [2022-11-18 21:14:06,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269378631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:14:06,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:14:06,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:14:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305510697] [2022-11-18 21:14:06,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:14:06,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:14:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:14:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:14:06,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:14:06,549 INFO L87 Difference]: Start difference. First operand 3496 states and 14157 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:06,985 INFO L93 Difference]: Finished difference Result 3330 states and 13491 transitions. [2022-11-18 21:14:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:14:06,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 26 [2022-11-18 21:14:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:06,996 INFO L225 Difference]: With dead ends: 3330 [2022-11-18 21:14:06,997 INFO L226 Difference]: Without dead ends: 3330 [2022-11-18 21:14:06,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:14:06,997 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:06,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:14:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-11-18 21:14:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2821. [2022-11-18 21:14:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2771 states have (on average 4.107181522915915) internal successors, (11381), 2820 states have internal predecessors, (11381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:07,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 11381 transitions. [2022-11-18 21:14:07,090 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 11381 transitions. Word has length 26 [2022-11-18 21:14:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:07,090 INFO L495 AbstractCegarLoop]: Abstraction has 2821 states and 11381 transitions. [2022-11-18 21:14:07,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 11381 transitions. [2022-11-18 21:14:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 21:14:07,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:07,091 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:07,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-18 21:14:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:14:07,292 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:14:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash -107101590, now seen corresponding path program 1 times [2022-11-18 21:14:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:14:07,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961094064] [2022-11-18 21:14:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:07,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:14:07,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:14:07,294 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:14:07,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-18 21:14:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:14:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:14:08,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:08,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:08,405 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:14:08,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:14:08,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:14:08,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:08,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:14:08,932 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:14:08,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:14:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:14:09,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:14:09,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:14:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961094064] [2022-11-18 21:14:09,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961094064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:14:09,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:14:09,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:14:09,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467524502] [2022-11-18 21:14:09,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:14:09,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:14:09,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:14:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:14:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:14:09,715 INFO L87 Difference]: Start difference. First operand 2821 states and 11381 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-18 21:14:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:10,179 INFO L93 Difference]: Finished difference Result 2820 states and 11378 transitions. [2022-11-18 21:14:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:14:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 27 [2022-11-18 21:14:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:10,224 INFO L225 Difference]: With dead ends: 2820 [2022-11-18 21:14:10,225 INFO L226 Difference]: Without dead ends: 2820 [2022-11-18 21:14:10,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:14:10,225 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:10,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-18 21:14:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2022-11-18 21:14:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2820. [2022-11-18 21:14:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2770 states have (on average 4.107581227436823) internal successors, (11378), 2819 states have internal predecessors, (11378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:14:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 11378 transitions. [2022-11-18 21:14:10,278 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 11378 transitions. Word has length 27 [2022-11-18 21:14:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:10,278 INFO L495 AbstractCegarLoop]: Abstraction has 2820 states and 11378 transitions. [2022-11-18 21:14:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-18 21:14:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 11378 transitions. [2022-11-18 21:14:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 21:14:10,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:10,279 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:10,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-18 21:14:10,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:14:10,480 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:14:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash -107099544, now seen corresponding path program 1 times [2022-11-18 21:14:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:14:10,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221002975] [2022-11-18 21:14:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:14:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:14:10,482 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:14:10,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_981dfc4c-fad0-4c5e-82a0-b9852c102d10/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-18 21:14:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:14:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:14:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:11,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:11,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:11,597 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 21:14:11,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 21:14:11,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 21:14:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:14:11,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:14:12,139 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:14:12,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 21:14:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:14:12,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:14:12,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:14:12,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221002975] [2022-11-18 21:14:12,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221002975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:14:12,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:14:12,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:14:12,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295436482] [2022-11-18 21:14:12,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:14:12,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:14:12,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:14:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:14:12,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:14:12,898 INFO L87 Difference]: Start difference. First operand 2820 states and 11378 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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)