./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8 --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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --- 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-e04fb08 [2022-11-16 11:35:35,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:35:35,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:35:35,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:35:35,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:35:35,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:35:35,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:35:35,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:35:35,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:35:35,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:35:35,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:35:35,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:35:35,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:35:35,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:35:35,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:35:35,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:35:35,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:35:35,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:35:35,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:35:35,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:35:35,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:35:35,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:35:35,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:35:35,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:35:35,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:35:35,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:35:35,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:35:35,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:35:35,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:35:35,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:35:35,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:35:35,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:35:35,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:35:35,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:35:35,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:35:35,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:35:35,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:35:35,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:35:35,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:35:35,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:35:35,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:35:35,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:35:35,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:35:35,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:35:35,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:35:35,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:35:35,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:35:35,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:35:35,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:35:35,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:35:35,781 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:35:35,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:35:35,782 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:35:35,783 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:35:35,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:35:35,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:35:35,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:35:35,783 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:35:35,784 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:35:35,784 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:35:35,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:35:35,784 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:35:35,785 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:35:35,785 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:35:35,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:35:35,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:35:35,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:35:35,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:35:35,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:35:35,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:35:35,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:35:35,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:35:35,788 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_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 [2022-11-16 11:35:36,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:35:36,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:35:36,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:35:36,100 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:35:36,101 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:35:36,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-11-16 11:35:36,171 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data/bfd13668a/e005c8ab46574babbcc13a4a3eb454e8/FLAG5ac17d4f3 [2022-11-16 11:35:36,601 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:35:36,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-11-16 11:35:36,614 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data/bfd13668a/e005c8ab46574babbcc13a4a3eb454e8/FLAG5ac17d4f3 [2022-11-16 11:35:36,965 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data/bfd13668a/e005c8ab46574babbcc13a4a3eb454e8 [2022-11-16 11:35:36,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:35:36,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:35:36,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:35:36,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:35:36,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:35:36,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:35:36" (1/1) ... [2022-11-16 11:35:36,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700d7575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:36, skipping insertion in model container [2022-11-16 11:35:36,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:35:36" (1/1) ... [2022-11-16 11:35:36,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:35:37,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:35:37,225 WARN L229 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_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-11-16 11:35:37,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:35:37,244 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) [2022-11-16 11:35:37,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b31fc45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:37, skipping insertion in model container [2022-11-16 11:35:37,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:35:37,248 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 11:35:37,250 INFO L158 Benchmark]: Toolchain (without parser) took 280.01ms. Allocated memory is still 136.3MB. Free memory was 95.1MB in the beginning and 110.3MB in the end (delta: -15.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-16 11:35:37,251 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 136.3MB. Free memory was 112.4MB in the beginning and 112.3MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:35:37,252 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.35ms. Allocated memory is still 136.3MB. Free memory was 94.8MB in the beginning and 110.3MB in the end (delta: -15.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:35:37,254 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 136.3MB. Free memory was 112.4MB in the beginning and 112.3MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.35ms. Allocated memory is still 136.3MB. Free memory was 94.8MB in the beginning and 110.3MB in the end (delta: -15.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8 --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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --- 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-e04fb08 [2022-11-16 11:35:39,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:35:39,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:35:39,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:35:39,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:35:39,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:35:39,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:35:39,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:35:39,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:35:39,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:35:39,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:35:39,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:35:39,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:35:39,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:35:39,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:35:39,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:35:39,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:35:39,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:35:39,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:35:39,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:35:39,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:35:39,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:35:39,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:35:39,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:35:39,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:35:39,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:35:39,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:35:39,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:35:39,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:35:39,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:35:39,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:35:39,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:35:39,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:35:39,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:35:39,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:35:39,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:35:39,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:35:39,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:35:39,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:35:39,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:35:39,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:35:39,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 11:35:39,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:35:39,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:35:39,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:35:39,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:35:39,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:35:39,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:35:39,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:35:39,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:35:39,439 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:35:39,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:35:39,440 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:35:39,440 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:35:39,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:35:39,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:35:39,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:35:39,441 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:35:39,441 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:35:39,441 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:35:39,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:35:39,442 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:35:39,442 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:35:39,442 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:35:39,442 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:35:39,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:35:39,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:35:39,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:35:39,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:35:39,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:35:39,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:35:39,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:35:39,444 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:35:39,444 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:35:39,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:35:39,445 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_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 [2022-11-16 11:35:39,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:35:39,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:35:39,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:35:39,879 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:35:39,881 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:35:39,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-11-16 11:35:39,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data/a169b9238/03f21646716f44b28d8e43d8b6114bd1/FLAG0eaca6342 [2022-11-16 11:35:40,481 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:35:40,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-11-16 11:35:40,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data/a169b9238/03f21646716f44b28d8e43d8b6114bd1/FLAG0eaca6342 [2022-11-16 11:35:40,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/data/a169b9238/03f21646716f44b28d8e43d8b6114bd1 [2022-11-16 11:35:40,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:35:40,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:35:40,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:35:40,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:35:40,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:35:40,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:35:40" (1/1) ... [2022-11-16 11:35:40,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67304871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:40, skipping insertion in model container [2022-11-16 11:35:40,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:35:40" (1/1) ... [2022-11-16 11:35:40,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:35:40,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:35:41,144 WARN L229 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_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-11-16 11:35:41,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:35:41,187 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 11:35:41,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:35:41,231 WARN L229 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_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-11-16 11:35:41,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:35:41,252 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:35:41,297 WARN L229 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_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-11-16 11:35:41,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:35:41,319 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:35:41,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41 WrapperNode [2022-11-16 11:35:41,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:35:41,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:35:41,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:35:41,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:35:41,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,383 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 322 [2022-11-16 11:35:41,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:35:41,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:35:41,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:35:41,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:35:41,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,445 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:35:41,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:35:41,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:35:41,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:35:41,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (1/1) ... [2022-11-16 11:35:41,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:35:41,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:41,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:35:41,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:35:41,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:35:41,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 11:35:41,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:35:41,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 11:35:41,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:35:41,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:35:41,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:35:41,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:35:41,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:35:41,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:35:41,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:35:41,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:35:41,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:35:41,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:35:41,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:35:41,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:35:41,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 11:35:41,536 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:35:41,699 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:35:41,701 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:35:42,634 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:35:42,997 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:35:42,998 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:35:43,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:35:43 BoogieIcfgContainer [2022-11-16 11:35:43,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:35:43,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:35:43,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:35:43,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:35:43,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:35:40" (1/3) ... [2022-11-16 11:35:43,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24711dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:35:43, skipping insertion in model container [2022-11-16 11:35:43,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:41" (2/3) ... [2022-11-16 11:35:43,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24711dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:35:43, skipping insertion in model container [2022-11-16 11:35:43,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:35:43" (3/3) ... [2022-11-16 11:35:43,016 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2022-11-16 11:35:43,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:35:43,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2022-11-16 11:35:43,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:35:43,183 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:35:43,232 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:35:43,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 281 transitions, 586 flow [2022-11-16 11:35:43,253 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 281 transitions, 586 flow [2022-11-16 11:35:43,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 281 transitions, 586 flow [2022-11-16 11:35:43,430 INFO L130 PetriNetUnfolder]: 19/278 cut-off events. [2022-11-16 11:35:43,431 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:35:43,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 278 events. 19/278 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 258 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2022-11-16 11:35:43,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 2982 [2022-11-16 11:36:52,981 INFO L134 LiptonReduction]: Checked pairs total: 8755 [2022-11-16 11:36:52,982 INFO L136 LiptonReduction]: Total number of compositions: 313 [2022-11-16 11:36:52,990 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 73 places, 69 transitions, 162 flow [2022-11-16 11:36:53,186 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3204 states, 2352 states have (on average 4.852891156462585) internal successors, (11414), 3203 states have internal predecessors, (11414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:53,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:53,212 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;@7fa2b347, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:53,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-11-16 11:36:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 3204 states, 2352 states have (on average 4.852891156462585) internal successors, (11414), 3203 states have internal predecessors, (11414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:36:53,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:53,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:36:53,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:36:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash 45437, now seen corresponding path program 1 times [2022-11-16 11:36:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:36:53,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92500913] [2022-11-16 11:36:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:53,249 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 [2022-11-16 11:36:53,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:36:53,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:36:53,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:36:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:36:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:53,574 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:36:53,575 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 [2022-11-16 11:36:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:53,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:36:53,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:36:53,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92500913] [2022-11-16 11:36:53,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92500913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:53,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:53,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:36:53,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302233729] [2022-11-16 11:36:53,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:53,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:53,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:36:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:53,645 INFO L87 Difference]: Start difference. First operand has 3204 states, 2352 states have (on average 4.852891156462585) internal successors, (11414), 3203 states have internal predecessors, (11414), 0 states have call successors, (0), 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) [2022-11-16 11:36:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:54,154 INFO L93 Difference]: Finished difference Result 3200 states and 11410 transitions. [2022-11-16 11:36:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:54,157 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 [2022-11-16 11:36:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:54,252 INFO L225 Difference]: With dead ends: 3200 [2022-11-16 11:36:54,253 INFO L226 Difference]: Without dead ends: 3200 [2022-11-16 11:36:54,254 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 [2022-11-16 11:36:54,258 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:54,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:36:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2022-11-16 11:36:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3200. [2022-11-16 11:36:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 2352 states have (on average 4.851190476190476) internal successors, (11410), 3199 states have internal predecessors, (11410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 11410 transitions. [2022-11-16 11:36:54,480 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 11410 transitions. Word has length 2 [2022-11-16 11:36:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:54,481 INFO L495 AbstractCegarLoop]: Abstraction has 3200 states and 11410 transitions. [2022-11-16 11:36:54,481 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) [2022-11-16 11:36:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 11410 transitions. [2022-11-16 11:36:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:36:54,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:54,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:36:54,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:36:54,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:36:54,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:36:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash 45438, now seen corresponding path program 1 times [2022-11-16 11:36:54,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:36:54,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176567644] [2022-11-16 11:36:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:54,697 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 [2022-11-16 11:36:54,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:36:54,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:36:54,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:36:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:54,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:36:54,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:55,085 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:36:55,086 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 [2022-11-16 11:36:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:36:55,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:36:55,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176567644] [2022-11-16 11:36:55,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176567644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:55,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:55,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:36:55,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842841205] [2022-11-16 11:36:55,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:55,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:36:55,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:36:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:36:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:36:55,126 INFO L87 Difference]: Start difference. First operand 3200 states and 11410 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) [2022-11-16 11:36:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:56,076 INFO L93 Difference]: Finished difference Result 6396 states and 22816 transitions. [2022-11-16 11:36:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:36:56,077 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 [2022-11-16 11:36:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:56,127 INFO L225 Difference]: With dead ends: 6396 [2022-11-16 11:36:56,128 INFO L226 Difference]: Without dead ends: 6396 [2022-11-16 11:36:56,128 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 [2022-11-16 11:36:56,129 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:56,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:36:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2022-11-16 11:36:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 3203. [2022-11-16 11:36:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 2355 states have (on average 4.848407643312102) internal successors, (11418), 3202 states have internal predecessors, (11418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 11418 transitions. [2022-11-16 11:36:56,410 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 11418 transitions. Word has length 2 [2022-11-16 11:36:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:56,410 INFO L495 AbstractCegarLoop]: Abstraction has 3203 states and 11418 transitions. [2022-11-16 11:36:56,411 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) [2022-11-16 11:36:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 11418 transitions. [2022-11-16 11:36:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:36:56,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:56,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:36:56,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:56,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:36:56,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:36:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:56,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1413778, now seen corresponding path program 1 times [2022-11-16 11:36:56,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:36:56,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341752536] [2022-11-16 11:36:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:56,614 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 [2022-11-16 11:36:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:36:56,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:36:56,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:36:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:36:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:56,957 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:36:56,957 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 [2022-11-16 11:36:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:57,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:57,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:36:57,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341752536] [2022-11-16 11:36:57,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341752536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:57,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:57,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:36:57,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177555410] [2022-11-16 11:36:57,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:36:57,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:36:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:36:57,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:36:57,315 INFO L87 Difference]: Start difference. First operand 3203 states and 11418 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) [2022-11-16 11:37:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:00,111 INFO L93 Difference]: Finished difference Result 9598 states and 34238 transitions. [2022-11-16 11:37:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:37:00,112 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 [2022-11-16 11:37:00,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:00,235 INFO L225 Difference]: With dead ends: 9598 [2022-11-16 11:37:00,235 INFO L226 Difference]: Without dead ends: 9598 [2022-11-16 11:37:00,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:37:00,237 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 263 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:00,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 0 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 11:37:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9598 states. [2022-11-16 11:37:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9598 to 3212. [2022-11-16 11:37:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 2364 states have (on average 4.840101522842639) internal successors, (11442), 3211 states have internal predecessors, (11442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 11442 transitions. [2022-11-16 11:37:00,710 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 11442 transitions. Word has length 3 [2022-11-16 11:37:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:00,710 INFO L495 AbstractCegarLoop]: Abstraction has 3212 states and 11442 transitions. [2022-11-16 11:37:00,710 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) [2022-11-16 11:37:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 11442 transitions. [2022-11-16 11:37:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:37:00,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:00,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:37:00,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-16 11:37:00,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:00,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:00,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash 43899980, now seen corresponding path program 1 times [2022-11-16 11:37:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:00,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210225195] [2022-11-16 11:37:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:00,924 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 [2022-11-16 11:37:00,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:00,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:00,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:01,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:37:01,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:01,213 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:37:01,214 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 [2022-11-16 11:37:01,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:01,585 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:37:01,586 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 [2022-11-16 11:37:02,046 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-16 11:37:02,047 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 51 treesize of output 76 [2022-11-16 11:37:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:02,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:02,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:02,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210225195] [2022-11-16 11:37:02,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210225195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:02,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:02,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:02,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379067274] [2022-11-16 11:37:02,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:02,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:02,550 INFO L87 Difference]: Start difference. First operand 3212 states and 11442 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:02,899 INFO L93 Difference]: Finished difference Result 3214 states and 11447 transitions. [2022-11-16 11:37:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:37:02,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:37:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:02,921 INFO L225 Difference]: With dead ends: 3214 [2022-11-16 11:37:02,922 INFO L226 Difference]: Without dead ends: 3214 [2022-11-16 11:37:02,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:02,923 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:02,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2022-11-16 11:37:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2022-11-16 11:37:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3214. [2022-11-16 11:37:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 2366 states have (on average 4.838123415046492) internal successors, (11447), 3213 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 11447 transitions. [2022-11-16 11:37:03,055 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 11447 transitions. Word has length 4 [2022-11-16 11:37:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:03,055 INFO L495 AbstractCegarLoop]: Abstraction has 3214 states and 11447 transitions. [2022-11-16 11:37:03,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 11447 transitions. [2022-11-16 11:37:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:37:03,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:03,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:37:03,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:03,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:03,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash 43899982, now seen corresponding path program 1 times [2022-11-16 11:37:03,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:03,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826275674] [2022-11-16 11:37:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:03,260 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 [2022-11-16 11:37:03,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:03,261 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:03,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:37:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:03,559 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 11:37:03,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-16 11:37:03,592 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:37:03,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 11:37:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:03,656 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 [2022-11-16 11:37:03,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:03,697 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 [2022-11-16 11:37:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:03,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:03,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:03,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826275674] [2022-11-16 11:37:03,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826275674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:03,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:03,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:03,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957131984] [2022-11-16 11:37:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:03,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:03,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:03,729 INFO L87 Difference]: Start difference. First operand 3214 states and 11447 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:04,185 INFO L93 Difference]: Finished difference Result 2576 states and 8893 transitions. [2022-11-16 11:37:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:37:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:04,203 INFO L225 Difference]: With dead ends: 2576 [2022-11-16 11:37:04,203 INFO L226 Difference]: Without dead ends: 2576 [2022-11-16 11:37:04,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:04,204 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:04,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-16 11:37:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2022-11-16 11:37:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2576. [2022-11-16 11:37:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 1954 states have (on average 4.551177072671443) internal successors, (8893), 2575 states have internal predecessors, (8893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 8893 transitions. [2022-11-16 11:37:04,281 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 8893 transitions. Word has length 4 [2022-11-16 11:37:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:04,281 INFO L495 AbstractCegarLoop]: Abstraction has 2576 states and 8893 transitions. [2022-11-16 11:37:04,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 8893 transitions. [2022-11-16 11:37:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:37:04,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:04,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:37:04,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:04,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:04,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1358874720, now seen corresponding path program 1 times [2022-11-16 11:37:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:04,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371455026] [2022-11-16 11:37:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:04,495 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 [2022-11-16 11:37:04,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:04,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:04,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:37:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:04,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:04,793 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:37:04,793 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 [2022-11-16 11:37:05,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:05,149 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:37:05,149 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 [2022-11-16 11:37:05,506 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-16 11:37:05,506 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 51 treesize of output 76 [2022-11-16 11:37:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:05,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:05,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371455026] [2022-11-16 11:37:05,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371455026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:05,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:05,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109687626] [2022-11-16 11:37:05,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:05,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:05,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:05,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:05,936 INFO L87 Difference]: Start difference. First operand 2576 states and 8893 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:06,239 INFO L93 Difference]: Finished difference Result 2577 states and 8895 transitions. [2022-11-16 11:37:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:37:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:37:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:06,252 INFO L225 Difference]: With dead ends: 2577 [2022-11-16 11:37:06,253 INFO L226 Difference]: Without dead ends: 2577 [2022-11-16 11:37:06,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:06,254 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:06,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-16 11:37:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2022-11-16 11:37:06,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2575. [2022-11-16 11:37:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 1953 states have (on average 4.552483358934972) internal successors, (8891), 2574 states have internal predecessors, (8891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 8891 transitions. [2022-11-16 11:37:06,329 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 8891 transitions. Word has length 5 [2022-11-16 11:37:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:06,329 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 8891 transitions. [2022-11-16 11:37:06,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 8891 transitions. [2022-11-16 11:37:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:37:06,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:06,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:37:06,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-16 11:37:06,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:06,542 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1360868795, now seen corresponding path program 1 times [2022-11-16 11:37:06,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:06,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855050749] [2022-11-16 11:37:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:06,544 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 [2022-11-16 11:37:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:06,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:06,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:06,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:37:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:06,852 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:37:06,852 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 [2022-11-16 11:37:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:07,150 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:37:07,150 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 [2022-11-16 11:37:07,578 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-16 11:37:07,578 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 51 treesize of output 76 [2022-11-16 11:37:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:07,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:07,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:07,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855050749] [2022-11-16 11:37:07,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855050749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:07,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:07,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:07,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178198656] [2022-11-16 11:37:07,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:07,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:07,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:07,931 INFO L87 Difference]: Start difference. First operand 2575 states and 8891 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:08,263 INFO L93 Difference]: Finished difference Result 2582 states and 8906 transitions. [2022-11-16 11:37:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:37:08,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:37:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:08,274 INFO L225 Difference]: With dead ends: 2582 [2022-11-16 11:37:08,274 INFO L226 Difference]: Without dead ends: 2582 [2022-11-16 11:37:08,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:08,276 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:08,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-16 11:37:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2022-11-16 11:37:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2580. [2022-11-16 11:37:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 1958 states have (on average 4.546475995914198) internal successors, (8902), 2579 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 8902 transitions. [2022-11-16 11:37:08,349 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 8902 transitions. Word has length 5 [2022-11-16 11:37:08,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:08,350 INFO L495 AbstractCegarLoop]: Abstraction has 2580 states and 8902 transitions. [2022-11-16 11:37:08,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 8902 transitions. [2022-11-16 11:37:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:37:08,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:08,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:37:08,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:08,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:08,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1360898958, now seen corresponding path program 1 times [2022-11-16 11:37:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:08,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977851150] [2022-11-16 11:37:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:08,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:08,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:08,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:08,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:08,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:37:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:08,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:08,856 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:37:08,857 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 [2022-11-16 11:37:08,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:08,934 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 [2022-11-16 11:37:08,979 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:08,980 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 [2022-11-16 11:37:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:09,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:09,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:09,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977851150] [2022-11-16 11:37:09,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977851150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:09,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:09,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:09,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409568750] [2022-11-16 11:37:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:09,007 INFO L87 Difference]: Start difference. First operand 2580 states and 8902 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:09,380 INFO L93 Difference]: Finished difference Result 1942 states and 6349 transitions. [2022-11-16 11:37:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:09,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:37:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:09,388 INFO L225 Difference]: With dead ends: 1942 [2022-11-16 11:37:09,388 INFO L226 Difference]: Without dead ends: 1942 [2022-11-16 11:37:09,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:09,389 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:09,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-16 11:37:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2022-11-16 11:37:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1936. [2022-11-16 11:37:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1540 states have (on average 4.114285714285714) internal successors, (6336), 1935 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6336 transitions. [2022-11-16 11:37:09,462 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6336 transitions. Word has length 5 [2022-11-16 11:37:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:09,463 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 6336 transitions. [2022-11-16 11:37:09,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6336 transitions. [2022-11-16 11:37:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:37:09,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:09,464 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 11:37:09,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:09,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:09,677 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:09,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:09,678 INFO L85 PathProgramCache]: Analyzing trace with hash -826648962, now seen corresponding path program 2 times [2022-11-16 11:37:09,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:09,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817750719] [2022-11-16 11:37:09,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:37:09,678 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 [2022-11-16 11:37:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:09,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:09,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:09,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:37:09,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:09,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:37:09,936 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 [2022-11-16 11:37:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:10,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:10,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:10,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817750719] [2022-11-16 11:37:10,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817750719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:10,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:10,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:37:10,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499141191] [2022-11-16 11:37:10,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:10,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:37:10,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:10,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:37:10,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:37:10,959 INFO L87 Difference]: Start difference. First operand 1936 states and 6336 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) [2022-11-16 11:37:14,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:16,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:19,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:23,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:25,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:26,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:28,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:33,556 INFO L93 Difference]: Finished difference Result 15369 states and 50478 transitions. [2022-11-16 11:37:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:37:33,558 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 [2022-11-16 11:37:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:33,605 INFO L225 Difference]: With dead ends: 15369 [2022-11-16 11:37:33,605 INFO L226 Difference]: Without dead ends: 15369 [2022-11-16 11:37:33,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:37:33,606 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1152 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 85 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:33,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 0 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1561 Invalid, 3 Unknown, 0 Unchecked, 20.8s Time] [2022-11-16 11:37:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15369 states. [2022-11-16 11:37:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15369 to 1950. [2022-11-16 11:37:33,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1554 states have (on average 4.095238095238095) internal successors, (6364), 1949 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6364 transitions. [2022-11-16 11:37:33,773 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6364 transitions. Word has length 6 [2022-11-16 11:37:33,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:33,773 INFO L495 AbstractCegarLoop]: Abstraction has 1950 states and 6364 transitions. [2022-11-16 11:37:33,773 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) [2022-11-16 11:37:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6364 transitions. [2022-11-16 11:37:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:37:33,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:33,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:37:33,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:33,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:33,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash -761756472, now seen corresponding path program 1 times [2022-11-16 11:37:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:33,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605261380] [2022-11-16 11:37:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:33,987 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 [2022-11-16 11:37:33,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:33,988 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:33,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:37:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:34,136 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 [2022-11-16 11:37:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:34,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:34,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:34,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605261380] [2022-11-16 11:37:34,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605261380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:34,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:34,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:37:34,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713191842] [2022-11-16 11:37:34,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:34,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:34,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:34,153 INFO L87 Difference]: Start difference. First operand 1950 states and 6364 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:34,536 INFO L93 Difference]: Finished difference Result 1576 states and 5113 transitions. [2022-11-16 11:37:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:37:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:37:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:34,540 INFO L225 Difference]: With dead ends: 1576 [2022-11-16 11:37:34,541 INFO L226 Difference]: Without dead ends: 1576 [2022-11-16 11:37:34,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:34,542 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:34,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:37:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-11-16 11:37:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1576. [2022-11-16 11:37:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1283 states have (on average 3.985190958690569) internal successors, (5113), 1575 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5113 transitions. [2022-11-16 11:37:34,593 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5113 transitions. Word has length 6 [2022-11-16 11:37:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:34,594 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 5113 transitions. [2022-11-16 11:37:34,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5113 transitions. [2022-11-16 11:37:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:37:34,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:34,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:37:34,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:34,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash -761756471, now seen corresponding path program 1 times [2022-11-16 11:37:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:34,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290337982] [2022-11-16 11:37:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:34,812 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 [2022-11-16 11:37:34,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:34,814 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:34,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:34,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:37:34,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:34,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:34,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:34,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290337982] [2022-11-16 11:37:34,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290337982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:34,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:34,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:37:34,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213201116] [2022-11-16 11:37:34,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:34,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:37:34,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:37:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:34,979 INFO L87 Difference]: Start difference. First operand 1576 states and 5113 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:35,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:35,422 INFO L93 Difference]: Finished difference Result 1673 states and 5506 transitions. [2022-11-16 11:37:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:35,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:37:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:35,428 INFO L225 Difference]: With dead ends: 1673 [2022-11-16 11:37:35,429 INFO L226 Difference]: Without dead ends: 1671 [2022-11-16 11:37:35,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:35,429 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:35,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:37:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-11-16 11:37:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1595. [2022-11-16 11:37:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1316 states have (on average 4.032674772036474) internal successors, (5307), 1594 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) [2022-11-16 11:37:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5307 transitions. [2022-11-16 11:37:35,470 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5307 transitions. Word has length 6 [2022-11-16 11:37:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:35,470 INFO L495 AbstractCegarLoop]: Abstraction has 1595 states and 5307 transitions. [2022-11-16 11:37:35,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5307 transitions. [2022-11-16 11:37:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:37:35,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:35,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:37:35,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:35,672 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash -761756429, now seen corresponding path program 1 times [2022-11-16 11:37:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:35,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328397903] [2022-11-16 11:37:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:35,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:35,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:35,673 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:35,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:37:35,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:35,899 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 11:37:35,900 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 [2022-11-16 11:37:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:35,986 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 [2022-11-16 11:37:36,032 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:36,033 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 [2022-11-16 11:37:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:36,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:36,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:36,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328397903] [2022-11-16 11:37:36,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328397903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:36,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:36,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:36,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243098861] [2022-11-16 11:37:36,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:36,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:36,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:36,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:36,075 INFO L87 Difference]: Start difference. First operand 1595 states and 5307 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:36,422 INFO L93 Difference]: Finished difference Result 1551 states and 5174 transitions. [2022-11-16 11:37:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:36,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:37:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:36,428 INFO L225 Difference]: With dead ends: 1551 [2022-11-16 11:37:36,428 INFO L226 Difference]: Without dead ends: 1551 [2022-11-16 11:37:36,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:36,429 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:36,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 11:37:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2022-11-16 11:37:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1551. [2022-11-16 11:37:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1293 states have (on average 4.0015467904099) internal successors, (5174), 1550 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 5174 transitions. [2022-11-16 11:37:36,462 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 5174 transitions. Word has length 6 [2022-11-16 11:37:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:36,462 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 5174 transitions. [2022-11-16 11:37:36,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 5174 transitions. [2022-11-16 11:37:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:37:36,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:36,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:37:36,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:36,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:36,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash -761756428, now seen corresponding path program 1 times [2022-11-16 11:37:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300860488] [2022-11-16 11:37:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:36,676 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 [2022-11-16 11:37:36,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:36,677 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:36,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:37:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:36,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:36,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:36,930 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:37:36,930 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 [2022-11-16 11:37:36,944 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 [2022-11-16 11:37:37,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:37,004 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 [2022-11-16 11:37:37,010 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 [2022-11-16 11:37:37,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:37,098 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 [2022-11-16 11:37:37,120 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:37:37,121 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 [2022-11-16 11:37:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:37,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:37,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:37,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300860488] [2022-11-16 11:37:37,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300860488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:37,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:37,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:37:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420375236] [2022-11-16 11:37:37,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:37,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:37:37,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:37,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:37:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:37,221 INFO L87 Difference]: Start difference. First operand 1551 states and 5174 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:37,617 INFO L93 Difference]: Finished difference Result 1554 states and 5179 transitions. [2022-11-16 11:37:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:37,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:37:37,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:37,623 INFO L225 Difference]: With dead ends: 1554 [2022-11-16 11:37:37,623 INFO L226 Difference]: Without dead ends: 1554 [2022-11-16 11:37:37,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:37,624 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:37,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 11:37:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-11-16 11:37:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1554. [2022-11-16 11:37:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1296 states have (on average 3.996141975308642) internal successors, (5179), 1553 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5179 transitions. [2022-11-16 11:37:37,657 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5179 transitions. Word has length 6 [2022-11-16 11:37:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:37,657 INFO L495 AbstractCegarLoop]: Abstraction has 1554 states and 5179 transitions. [2022-11-16 11:37:37,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5179 transitions. [2022-11-16 11:37:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:37:37,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:37,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:37,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:37,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:37,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2124889763, now seen corresponding path program 1 times [2022-11-16 11:37:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:37,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211810592] [2022-11-16 11:37:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:37,872 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 [2022-11-16 11:37:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:37,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:37,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:37:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:38,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:38,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:38,182 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 11:37:38,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 11:37:38,197 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 [2022-11-16 11:37:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:38,252 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 [2022-11-16 11:37:38,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:38,292 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 [2022-11-16 11:37:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:38,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:38,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:38,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211810592] [2022-11-16 11:37:38,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211810592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:38,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:38,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:38,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178153767] [2022-11-16 11:37:38,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:38,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:38,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:38,385 INFO L87 Difference]: Start difference. First operand 1554 states and 5179 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) [2022-11-16 11:37:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:38,744 INFO L93 Difference]: Finished difference Result 1510 states and 5046 transitions. [2022-11-16 11:37:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:37:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:38,749 INFO L225 Difference]: With dead ends: 1510 [2022-11-16 11:37:38,749 INFO L226 Difference]: Without dead ends: 1510 [2022-11-16 11:37:38,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:38,750 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:38,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-11-16 11:37:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2022-11-16 11:37:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1507. [2022-11-16 11:37:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1270 states have (on average 3.969291338582677) internal successors, (5041), 1506 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5041 transitions. [2022-11-16 11:37:38,780 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5041 transitions. Word has length 7 [2022-11-16 11:37:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:38,780 INFO L495 AbstractCegarLoop]: Abstraction has 1507 states and 5041 transitions. [2022-11-16 11:37:38,781 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) [2022-11-16 11:37:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5041 transitions. [2022-11-16 11:37:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:37:38,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:38,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:38,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:38,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:38,994 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1903454088, now seen corresponding path program 1 times [2022-11-16 11:37:38,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151381344] [2022-11-16 11:37:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:38,995 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 [2022-11-16 11:37:38,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:38,996 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:38,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:37:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:39,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:39,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:39,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151381344] [2022-11-16 11:37:39,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151381344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:39,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:39,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:39,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906824113] [2022-11-16 11:37:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:39,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:37:39,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:37:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:39,151 INFO L87 Difference]: Start difference. First operand 1507 states and 5041 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:39,621 INFO L93 Difference]: Finished difference Result 1437 states and 4769 transitions. [2022-11-16 11:37:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:37:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:39,627 INFO L225 Difference]: With dead ends: 1437 [2022-11-16 11:37:39,627 INFO L226 Difference]: Without dead ends: 1437 [2022-11-16 11:37:39,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:39,628 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:39,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:37:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-11-16 11:37:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1309. [2022-11-16 11:37:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1134 states have (on average 3.919753086419753) internal successors, (4445), 1308 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4445 transitions. [2022-11-16 11:37:39,654 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4445 transitions. Word has length 8 [2022-11-16 11:37:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:39,654 INFO L495 AbstractCegarLoop]: Abstraction has 1309 states and 4445 transitions. [2022-11-16 11:37:39,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4445 transitions. [2022-11-16 11:37:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:37:39,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:39,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:39,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:39,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:39,859 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1903454034, now seen corresponding path program 1 times [2022-11-16 11:37:39,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:39,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71068250] [2022-11-16 11:37:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:39,860 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 [2022-11-16 11:37:39,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:39,862 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:39,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:37:40,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:40,121 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:37:40,121 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 [2022-11-16 11:37:40,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:37:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:40,167 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 [2022-11-16 11:37:40,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:40,207 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 [2022-11-16 11:37:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:40,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:40,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:40,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71068250] [2022-11-16 11:37:40,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71068250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:40,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:40,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:37:40,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604259049] [2022-11-16 11:37:40,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:40,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:37:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:37:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:40,306 INFO L87 Difference]: Start difference. First operand 1309 states and 4445 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:40,653 INFO L93 Difference]: Finished difference Result 1298 states and 4421 transitions. [2022-11-16 11:37:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:37:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:40,659 INFO L225 Difference]: With dead ends: 1298 [2022-11-16 11:37:40,659 INFO L226 Difference]: Without dead ends: 1298 [2022-11-16 11:37:40,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:40,660 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:40,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 11:37:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-11-16 11:37:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2022-11-16 11:37:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1129 states have (on average 3.91585473870682) internal successors, (4421), 1297 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4421 transitions. [2022-11-16 11:37:40,683 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4421 transitions. Word has length 8 [2022-11-16 11:37:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:40,683 INFO L495 AbstractCegarLoop]: Abstraction has 1298 states and 4421 transitions. [2022-11-16 11:37:40,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4421 transitions. [2022-11-16 11:37:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:37:40,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:40,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:40,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:40,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:40,888 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1903454033, now seen corresponding path program 1 times [2022-11-16 11:37:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:40,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960549731] [2022-11-16 11:37:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:40,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:40,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:40,890 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:40,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:41,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:37:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:41,160 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:41,160 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 [2022-11-16 11:37:41,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:41,205 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 [2022-11-16 11:37:41,245 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:41,245 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 [2022-11-16 11:37:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:41,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:41,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960549731] [2022-11-16 11:37:41,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960549731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:41,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:41,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:41,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6466908] [2022-11-16 11:37:41,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:41,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:41,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:41,315 INFO L87 Difference]: Start difference. First operand 1298 states and 4421 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:41,732 INFO L93 Difference]: Finished difference Result 1303 states and 4431 transitions. [2022-11-16 11:37:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:41,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:37:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:41,739 INFO L225 Difference]: With dead ends: 1303 [2022-11-16 11:37:41,739 INFO L226 Difference]: Without dead ends: 1303 [2022-11-16 11:37:41,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:41,740 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:41,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-11-16 11:37:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-11-16 11:37:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1303. [2022-11-16 11:37:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1134 states have (on average 3.9074074074074074) internal successors, (4431), 1302 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4431 transitions. [2022-11-16 11:37:41,772 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4431 transitions. Word has length 8 [2022-11-16 11:37:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:41,773 INFO L495 AbstractCegarLoop]: Abstraction has 1303 states and 4431 transitions. [2022-11-16 11:37:41,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4431 transitions. [2022-11-16 11:37:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:37:41,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:41,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:41,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:41,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:41,974 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1909629598, now seen corresponding path program 1 times [2022-11-16 11:37:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:41,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883474152] [2022-11-16 11:37:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:41,976 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 [2022-11-16 11:37:41,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:41,977 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:41,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:42,249 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:42,249 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 [2022-11-16 11:37:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:42,304 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 [2022-11-16 11:37:42,382 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:42,382 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 [2022-11-16 11:37:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:42,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:42,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:42,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883474152] [2022-11-16 11:37:42,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883474152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:42,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:42,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:42,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223693100] [2022-11-16 11:37:42,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:42,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:42,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:42,439 INFO L87 Difference]: Start difference. First operand 1303 states and 4431 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) [2022-11-16 11:37:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:42,800 INFO L93 Difference]: Finished difference Result 1307 states and 4439 transitions. [2022-11-16 11:37:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:37:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:42,804 INFO L225 Difference]: With dead ends: 1307 [2022-11-16 11:37:42,804 INFO L226 Difference]: Without dead ends: 1307 [2022-11-16 11:37:42,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:42,805 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:42,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-11-16 11:37:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1302. [2022-11-16 11:37:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1133 states have (on average 3.909090909090909) internal successors, (4429), 1301 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4429 transitions. [2022-11-16 11:37:42,836 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4429 transitions. Word has length 9 [2022-11-16 11:37:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:42,836 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 4429 transitions. [2022-11-16 11:37:42,836 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) [2022-11-16 11:37:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4429 transitions. [2022-11-16 11:37:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:37:42,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:42,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:42,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:43,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:43,050 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1122857506, now seen corresponding path program 1 times [2022-11-16 11:37:43,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:43,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552123082] [2022-11-16 11:37:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:43,051 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 [2022-11-16 11:37:43,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:43,052 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:43,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:43,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:43,301 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:43,301 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 [2022-11-16 11:37:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:43,346 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 [2022-11-16 11:37:43,383 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:43,383 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 [2022-11-16 11:37:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:43,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:43,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:43,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552123082] [2022-11-16 11:37:43,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552123082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:43,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:43,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:43,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219043278] [2022-11-16 11:37:43,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:43,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:43,447 INFO L87 Difference]: Start difference. First operand 1302 states and 4429 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) [2022-11-16 11:37:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:43,786 INFO L93 Difference]: Finished difference Result 1310 states and 4443 transitions. [2022-11-16 11:37:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:43,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:37:43,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:43,790 INFO L225 Difference]: With dead ends: 1310 [2022-11-16 11:37:43,790 INFO L226 Difference]: Without dead ends: 1310 [2022-11-16 11:37:43,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:43,790 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:43,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-11-16 11:37:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1310. [2022-11-16 11:37:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1141 states have (on average 3.8939526730937772) internal successors, (4443), 1309 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4443 transitions. [2022-11-16 11:37:43,812 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4443 transitions. Word has length 9 [2022-11-16 11:37:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:43,813 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 4443 transitions. [2022-11-16 11:37:43,813 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) [2022-11-16 11:37:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4443 transitions. [2022-11-16 11:37:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:37:43,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:43,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:43,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:44,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:44,019 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:44,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1122469727, now seen corresponding path program 1 times [2022-11-16 11:37:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530771138] [2022-11-16 11:37:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:44,020 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 [2022-11-16 11:37:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:44,021 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:44,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:44,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:44,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:44,253 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:44,253 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 [2022-11-16 11:37:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:44,295 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 [2022-11-16 11:37:44,332 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:44,333 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 [2022-11-16 11:37:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:44,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:44,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530771138] [2022-11-16 11:37:44,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530771138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:44,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:44,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:44,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681267276] [2022-11-16 11:37:44,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:44,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:44,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:44,400 INFO L87 Difference]: Start difference. First operand 1310 states and 4443 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) [2022-11-16 11:37:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:44,749 INFO L93 Difference]: Finished difference Result 1311 states and 4445 transitions. [2022-11-16 11:37:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:44,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:37:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:44,755 INFO L225 Difference]: With dead ends: 1311 [2022-11-16 11:37:44,755 INFO L226 Difference]: Without dead ends: 1311 [2022-11-16 11:37:44,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:44,756 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:44,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-11-16 11:37:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1311. [2022-11-16 11:37:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1142 states have (on average 3.892294220665499) internal successors, (4445), 1310 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4445 transitions. [2022-11-16 11:37:44,781 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4445 transitions. Word has length 9 [2022-11-16 11:37:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:44,781 INFO L495 AbstractCegarLoop]: Abstraction has 1311 states and 4445 transitions. [2022-11-16 11:37:44,781 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) [2022-11-16 11:37:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4445 transitions. [2022-11-16 11:37:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:37:44,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:44,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:44,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:44,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:44,983 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash -298977551, now seen corresponding path program 1 times [2022-11-16 11:37:44,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:44,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074040151] [2022-11-16 11:37:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:44,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:44,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:44,984 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:44,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:45,298 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:45,298 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 [2022-11-16 11:37:45,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:45,340 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 [2022-11-16 11:37:45,384 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:45,384 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 [2022-11-16 11:37:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:45,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:45,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:45,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074040151] [2022-11-16 11:37:45,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074040151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:45,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:45,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:45,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295398459] [2022-11-16 11:37:45,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:45,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:45,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:45,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:45,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:45,449 INFO L87 Difference]: Start difference. First operand 1311 states and 4445 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) [2022-11-16 11:37:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:45,806 INFO L93 Difference]: Finished difference Result 1323 states and 4470 transitions. [2022-11-16 11:37:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:37:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:45,811 INFO L225 Difference]: With dead ends: 1323 [2022-11-16 11:37:45,811 INFO L226 Difference]: Without dead ends: 1323 [2022-11-16 11:37:45,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:45,812 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:45,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-11-16 11:37:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1319. [2022-11-16 11:37:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1150 states have (on average 3.88) internal successors, (4462), 1318 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4462 transitions. [2022-11-16 11:37:45,866 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4462 transitions. Word has length 9 [2022-11-16 11:37:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:45,867 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 4462 transitions. [2022-11-16 11:37:45,867 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) [2022-11-16 11:37:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4462 transitions. [2022-11-16 11:37:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:37:45,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:45,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:45,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:37:46,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:46,071 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash -930634221, now seen corresponding path program 1 times [2022-11-16 11:37:46,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:46,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233033725] [2022-11-16 11:37:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:46,072 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 [2022-11-16 11:37:46,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:46,073 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:46,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:37:46,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:46,336 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:46,336 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 [2022-11-16 11:37:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:46,377 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 14 treesize of output 20 [2022-11-16 11:37:46,422 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:46,423 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 [2022-11-16 11:37:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:46,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:46,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:46,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233033725] [2022-11-16 11:37:46,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233033725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:46,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:46,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:46,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888860031] [2022-11-16 11:37:46,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:46,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:46,487 INFO L87 Difference]: Start difference. First operand 1319 states and 4462 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) [2022-11-16 11:37:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:46,820 INFO L93 Difference]: Finished difference Result 1326 states and 4474 transitions. [2022-11-16 11:37:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:46,821 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 10 [2022-11-16 11:37:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:46,827 INFO L225 Difference]: With dead ends: 1326 [2022-11-16 11:37:46,828 INFO L226 Difference]: Without dead ends: 1326 [2022-11-16 11:37:46,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:46,828 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:46,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-11-16 11:37:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1323. [2022-11-16 11:37:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1154 states have (on average 3.8734835355285964) internal successors, (4470), 1322 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4470 transitions. [2022-11-16 11:37:46,860 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4470 transitions. Word has length 10 [2022-11-16 11:37:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:46,860 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 4470 transitions. [2022-11-16 11:37:46,860 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) [2022-11-16 11:37:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4470 transitions. [2022-11-16 11:37:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:37:46,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:46,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:46,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:47,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:47,073 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:47,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:47,074 INFO L85 PathProgramCache]: Analyzing trace with hash -931022000, now seen corresponding path program 1 times [2022-11-16 11:37:47,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:47,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041136745] [2022-11-16 11:37:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:47,075 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 [2022-11-16 11:37:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:47,076 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:47,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:37:47,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:47,376 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:47,376 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 [2022-11-16 11:37:47,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:47,420 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 [2022-11-16 11:37:47,464 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:47,464 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 [2022-11-16 11:37:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:47,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:47,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:47,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041136745] [2022-11-16 11:37:47,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041136745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:47,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:47,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:47,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878830503] [2022-11-16 11:37:47,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:47,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:47,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:47,530 INFO L87 Difference]: Start difference. First operand 1323 states and 4470 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) [2022-11-16 11:37:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:47,869 INFO L93 Difference]: Finished difference Result 1324 states and 4472 transitions. [2022-11-16 11:37:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:47,870 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 10 [2022-11-16 11:37:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:47,879 INFO L225 Difference]: With dead ends: 1324 [2022-11-16 11:37:47,879 INFO L226 Difference]: Without dead ends: 1324 [2022-11-16 11:37:47,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:47,880 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:47,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:47,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-11-16 11:37:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1319. [2022-11-16 11:37:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1150 states have (on average 3.88) internal successors, (4462), 1318 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4462 transitions. [2022-11-16 11:37:47,911 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4462 transitions. Word has length 10 [2022-11-16 11:37:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:47,912 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 4462 transitions. [2022-11-16 11:37:47,912 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) [2022-11-16 11:37:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4462 transitions. [2022-11-16 11:37:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:37:47,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:47,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:47,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:48,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:48,125 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1942498018, now seen corresponding path program 1 times [2022-11-16 11:37:48,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:48,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582554356] [2022-11-16 11:37:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:48,126 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 [2022-11-16 11:37:48,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:48,127 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:48,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:48,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:48,453 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:48,453 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 [2022-11-16 11:37:48,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:48,498 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 [2022-11-16 11:37:48,544 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:48,545 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 [2022-11-16 11:37:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:48,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:48,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:48,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582554356] [2022-11-16 11:37:48,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582554356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:48,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:48,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:48,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534180188] [2022-11-16 11:37:48,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:48,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:48,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:48,618 INFO L87 Difference]: Start difference. First operand 1319 states and 4462 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) [2022-11-16 11:37:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:48,939 INFO L93 Difference]: Finished difference Result 1318 states and 4459 transitions. [2022-11-16 11:37:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:48,940 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 10 [2022-11-16 11:37:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:48,944 INFO L225 Difference]: With dead ends: 1318 [2022-11-16 11:37:48,944 INFO L226 Difference]: Without dead ends: 1318 [2022-11-16 11:37:48,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:48,945 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:48,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-11-16 11:37:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1305. [2022-11-16 11:37:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1136 states have (on average 3.9014084507042255) internal successors, (4432), 1304 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4432 transitions. [2022-11-16 11:37:48,976 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4432 transitions. Word has length 10 [2022-11-16 11:37:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:48,976 INFO L495 AbstractCegarLoop]: Abstraction has 1305 states and 4432 transitions. [2022-11-16 11:37:48,976 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) [2022-11-16 11:37:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4432 transitions. [2022-11-16 11:37:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:37:48,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:48,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:48,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:49,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:49,190 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:49,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash 448846924, now seen corresponding path program 1 times [2022-11-16 11:37:49,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:49,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718657340] [2022-11-16 11:37:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:49,190 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 [2022-11-16 11:37:49,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:49,192 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:49,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:37:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:49,433 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:49,434 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:37:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:49,489 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 [2022-11-16 11:37:49,530 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:49,530 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 [2022-11-16 11:37:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:49,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:49,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:49,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718657340] [2022-11-16 11:37:49,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718657340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:49,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:49,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:49,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772585570] [2022-11-16 11:37:49,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:49,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:49,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:49,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:49,598 INFO L87 Difference]: Start difference. First operand 1305 states and 4432 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) [2022-11-16 11:37:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:49,944 INFO L93 Difference]: Finished difference Result 1315 states and 4449 transitions. [2022-11-16 11:37:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:49,945 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 10 [2022-11-16 11:37:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:49,948 INFO L225 Difference]: With dead ends: 1315 [2022-11-16 11:37:49,948 INFO L226 Difference]: Without dead ends: 1315 [2022-11-16 11:37:49,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:49,949 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:49,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-11-16 11:37:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1315. [2022-11-16 11:37:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1146 states have (on average 3.8821989528795813) internal successors, (4449), 1314 states have internal predecessors, (4449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 4449 transitions. [2022-11-16 11:37:49,968 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 4449 transitions. Word has length 10 [2022-11-16 11:37:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:49,969 INFO L495 AbstractCegarLoop]: Abstraction has 1315 states and 4449 transitions. [2022-11-16 11:37:49,969 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) [2022-11-16 11:37:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 4449 transitions. [2022-11-16 11:37:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:37:49,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:49,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:49,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:50,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:50,170 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash 436778135, now seen corresponding path program 1 times [2022-11-16 11:37:50,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:50,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208263823] [2022-11-16 11:37:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:50,171 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 [2022-11-16 11:37:50,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:50,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:50,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:37:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:50,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:50,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:50,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208263823] [2022-11-16 11:37:50,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208263823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:50,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:50,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:50,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541008143] [2022-11-16 11:37:50,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:50,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:50,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:50,392 INFO L87 Difference]: Start difference. First operand 1315 states and 4449 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) [2022-11-16 11:37:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:50,913 INFO L93 Difference]: Finished difference Result 1398 states and 4601 transitions. [2022-11-16 11:37:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:37:50,914 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 10 [2022-11-16 11:37:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:50,917 INFO L225 Difference]: With dead ends: 1398 [2022-11-16 11:37:50,917 INFO L226 Difference]: Without dead ends: 1397 [2022-11-16 11:37:50,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:50,918 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:50,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:37:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2022-11-16 11:37:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1378. [2022-11-16 11:37:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1209 states have (on average 3.7866004962779156) internal successors, (4578), 1377 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4578 transitions. [2022-11-16 11:37:50,950 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4578 transitions. Word has length 10 [2022-11-16 11:37:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:50,950 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 4578 transitions. [2022-11-16 11:37:50,950 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) [2022-11-16 11:37:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4578 transitions. [2022-11-16 11:37:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:37:50,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:50,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:50,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:51,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:51,163 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -677979104, now seen corresponding path program 1 times [2022-11-16 11:37:51,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:51,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888633373] [2022-11-16 11:37:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:51,165 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 [2022-11-16 11:37:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:51,166 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:51,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:37:51,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:51,483 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:51,484 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 [2022-11-16 11:37:51,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:51,531 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 [2022-11-16 11:37:51,572 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:51,572 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 [2022-11-16 11:37:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:51,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:51,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:51,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888633373] [2022-11-16 11:37:51,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888633373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:51,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:51,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:51,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704625756] [2022-11-16 11:37:51,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:51,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:51,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:51,652 INFO L87 Difference]: Start difference. First operand 1378 states and 4578 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) [2022-11-16 11:37:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:52,016 INFO L93 Difference]: Finished difference Result 1408 states and 4636 transitions. [2022-11-16 11:37:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:52,016 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 10 [2022-11-16 11:37:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:52,020 INFO L225 Difference]: With dead ends: 1408 [2022-11-16 11:37:52,020 INFO L226 Difference]: Without dead ends: 1408 [2022-11-16 11:37:52,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:52,020 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:52,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-11-16 11:37:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1402. [2022-11-16 11:37:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1233 states have (on average 3.753446877534469) internal successors, (4628), 1401 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4628 transitions. [2022-11-16 11:37:52,050 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4628 transitions. Word has length 10 [2022-11-16 11:37:52,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:52,050 INFO L495 AbstractCegarLoop]: Abstraction has 1402 states and 4628 transitions. [2022-11-16 11:37:52,050 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) [2022-11-16 11:37:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4628 transitions. [2022-11-16 11:37:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:37:52,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:52,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:52,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-16 11:37:52,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:52,263 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash -678366883, now seen corresponding path program 1 times [2022-11-16 11:37:52,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:52,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096141486] [2022-11-16 11:37:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:52,264 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 [2022-11-16 11:37:52,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:52,266 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:52,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:37:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:52,550 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:37:52,550 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 [2022-11-16 11:37:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:52,597 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 [2022-11-16 11:37:52,631 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:37:52,631 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 [2022-11-16 11:37:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:52,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:52,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:52,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096141486] [2022-11-16 11:37:52,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096141486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:52,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:52,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:52,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841730154] [2022-11-16 11:37:52,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:52,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:37:52,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:52,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:37:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:37:52,702 INFO L87 Difference]: Start difference. First operand 1402 states and 4628 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) [2022-11-16 11:37:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:53,026 INFO L93 Difference]: Finished difference Result 1404 states and 4632 transitions. [2022-11-16 11:37:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:37:53,027 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 10 [2022-11-16 11:37:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:53,031 INFO L225 Difference]: With dead ends: 1404 [2022-11-16 11:37:53,031 INFO L226 Difference]: Without dead ends: 1404 [2022-11-16 11:37:53,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:37:53,032 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:53,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:37:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-11-16 11:37:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1394. [2022-11-16 11:37:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1225 states have (on average 3.7648979591836733) internal successors, (4612), 1393 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4612 transitions. [2022-11-16 11:37:53,071 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4612 transitions. Word has length 10 [2022-11-16 11:37:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:53,072 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 4612 transitions. [2022-11-16 11:37:53,072 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) [2022-11-16 11:37:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4612 transitions. [2022-11-16 11:37:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:37:53,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:53,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:53,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-16 11:37:53,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:53,283 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:37:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:53,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2130361941, now seen corresponding path program 1 times [2022-11-16 11:37:53,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:53,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862515369] [2022-11-16 11:37:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:53,284 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 [2022-11-16 11:37:53,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:53,285 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:37:53,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:37:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:37:53,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:53,663 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:37:53,663 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 [2022-11-16 11:37:53,796 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:37:53,797 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 [2022-11-16 11:37:53,954 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:37:53,955 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 [2022-11-16 11:37:53,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:37:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:37:54,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:37:54,032 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:37:54,033 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 [2022-11-16 11:37:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:54,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:01,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:38:01,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862515369] [2022-11-16 11:38:01,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862515369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:01,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:38:01,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:38:01,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069971376] [2022-11-16 11:38:01,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:01,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:38:01,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:38:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:38:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:38:01,617 INFO L87 Difference]: Start difference. First operand 1394 states and 4612 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2022-11-16 11:38:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:02,218 INFO L93 Difference]: Finished difference Result 1630 states and 5832 transitions. [2022-11-16 11:38:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:38:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:38:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:02,223 INFO L225 Difference]: With dead ends: 1630 [2022-11-16 11:38:02,223 INFO L226 Difference]: Without dead ends: 1630 [2022-11-16 11:38:02,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:38:02,224 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:02,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 217 Unchecked, 0.6s Time] [2022-11-16 11:38:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2022-11-16 11:38:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1546. [2022-11-16 11:38:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1377 states have (on average 3.972403776325345) internal successors, (5470), 1545 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 5470 transitions. [2022-11-16 11:38:02,265 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 5470 transitions. Word has length 11 [2022-11-16 11:38:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:02,265 INFO L495 AbstractCegarLoop]: Abstraction has 1546 states and 5470 transitions. [2022-11-16 11:38:02,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2022-11-16 11:38:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 5470 transitions. [2022-11-16 11:38:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:38:02,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:02,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:02,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:02,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:38:02,479 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:38:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:02,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2130361939, now seen corresponding path program 1 times [2022-11-16 11:38:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:38:02,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895616767] [2022-11-16 11:38:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:02,480 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 [2022-11-16 11:38:02,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:38:02,481 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:38:02,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:38:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:38:02,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:38:02,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:38:02,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:38:02,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895616767] [2022-11-16 11:38:02,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895616767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:38:02,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:38:02,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:38:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476795955] [2022-11-16 11:38:02,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:38:02,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:38:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:38:02,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:38:02,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:38:02,701 INFO L87 Difference]: Start difference. First operand 1546 states and 5470 transitions. Second operand has 3 states, 2 states have (on average 5.5) 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) [2022-11-16 11:38:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:03,283 INFO L93 Difference]: Finished difference Result 1589 states and 5340 transitions. [2022-11-16 11:38:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:38:03,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) 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 11 [2022-11-16 11:38:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:03,303 INFO L225 Difference]: With dead ends: 1589 [2022-11-16 11:38:03,303 INFO L226 Difference]: Without dead ends: 1588 [2022-11-16 11:38:03,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:38:03,305 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:03,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:38:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-11-16 11:38:03,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1563. [2022-11-16 11:38:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1374 states have (on average 3.858806404657933) internal successors, (5302), 1562 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5302 transitions. [2022-11-16 11:38:03,328 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5302 transitions. Word has length 11 [2022-11-16 11:38:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:03,328 INFO L495 AbstractCegarLoop]: Abstraction has 1563 states and 5302 transitions. [2022-11-16 11:38:03,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) 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) [2022-11-16 11:38:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5302 transitions. [2022-11-16 11:38:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:38:03,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:03,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:03,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-16 11:38:03,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:38:03,530 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:38:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2130361942, now seen corresponding path program 1 times [2022-11-16 11:38:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:38:03,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786168111] [2022-11-16 11:38:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:03,532 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 [2022-11-16 11:38:03,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:38:03,532 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:38:03,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:38:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:03,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:38:03,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:03,869 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:38:03,870 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 [2022-11-16 11:38:03,909 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:38:03,909 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 [2022-11-16 11:38:03,935 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:38:03,935 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 [2022-11-16 11:38:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:38:03,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:38:03,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:38:03,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786168111] [2022-11-16 11:38:03,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786168111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:38:03,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:38:03,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:38:03,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401317329] [2022-11-16 11:38:03,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:38:03,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:38:03,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:38:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:38:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:38:03,964 INFO L87 Difference]: Start difference. First operand 1563 states and 5302 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) [2022-11-16 11:38:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:04,308 INFO L93 Difference]: Finished difference Result 1094 states and 3660 transitions. [2022-11-16 11:38:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:38:04,308 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 11 [2022-11-16 11:38:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:04,311 INFO L225 Difference]: With dead ends: 1094 [2022-11-16 11:38:04,311 INFO L226 Difference]: Without dead ends: 1094 [2022-11-16 11:38:04,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:38:04,312 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:04,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:38:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-16 11:38:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1088. [2022-11-16 11:38:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 996 states have (on average 3.6536144578313254) internal successors, (3639), 1087 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3639 transitions. [2022-11-16 11:38:04,326 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3639 transitions. Word has length 11 [2022-11-16 11:38:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:04,326 INFO L495 AbstractCegarLoop]: Abstraction has 1088 states and 3639 transitions. [2022-11-16 11:38:04,326 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) [2022-11-16 11:38:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3639 transitions. [2022-11-16 11:38:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:38:04,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:04,327 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1] [2022-11-16 11:38:04,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-16 11:38:04,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:38:04,538 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:38:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash -353516738, now seen corresponding path program 1 times [2022-11-16 11:38:04,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:38:04,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636866611] [2022-11-16 11:38:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:04,539 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 [2022-11-16 11:38:04,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:38:04,540 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:38:04,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:38:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:04,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:38:04,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:04,731 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 8 treesize of output 7 [2022-11-16 11:38:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:05,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:07,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:38:07,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636866611] [2022-11-16 11:38:07,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636866611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:07,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:38:07,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-16 11:38:07,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702384750] [2022-11-16 11:38:07,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:07,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:38:07,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:38:07,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:38:07,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:38:07,454 INFO L87 Difference]: Start difference. First operand 1088 states and 3639 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:15,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:17,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:19,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:21,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:23,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:25,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:26,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:33,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:35,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:37,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:38,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:40,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:42,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:44,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:45,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:49,841 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 [] [2022-11-16 11:39:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:00,356 INFO L93 Difference]: Finished difference Result 10468 states and 33379 transitions. [2022-11-16 11:39:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:39:00,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:39:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:00,385 INFO L225 Difference]: With dead ends: 10468 [2022-11-16 11:39:00,385 INFO L226 Difference]: Without dead ends: 10468 [2022-11-16 11:39:00,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:39:00,386 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1656 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 254 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1656 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1656 Valid, 0 Invalid, 3948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 3681 Invalid, 13 Unknown, 0 Unchecked, 44.9s Time] [2022-11-16 11:39:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10468 states. [2022-11-16 11:39:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10468 to 1125. [2022-11-16 11:39:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1033 states have (on average 3.594385285575992) internal successors, (3713), 1124 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3713 transitions. [2022-11-16 11:39:00,460 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3713 transitions. Word has length 11 [2022-11-16 11:39:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:00,460 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 3713 transitions. [2022-11-16 11:39:00,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3713 transitions. [2022-11-16 11:39:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:39:00,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:00,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:00,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:39:00,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:00,674 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:00,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1215112827, now seen corresponding path program 1 times [2022-11-16 11:39:00,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:00,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213877860] [2022-11-16 11:39:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:00,675 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 [2022-11-16 11:39:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:00,676 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:00,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:39:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:00,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:00,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:00,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:00,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:01,089 INFO L321 Elim1Store]: treesize reduction 72, result has 26.5 percent of original size [2022-11-16 11:39:01,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 48 [2022-11-16 11:39:01,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:01,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:01,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:01,321 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 11:39:01,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 55 [2022-11-16 11:39:01,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:01,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:01,588 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-16 11:39:01,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 11:39:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:39:02,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:39:02,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:02,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213877860] [2022-11-16 11:39:02,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213877860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:39:02,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:39:02,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:39:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589299307] [2022-11-16 11:39:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:39:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:39:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:39:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:39:02,301 INFO L87 Difference]: Start difference. First operand 1125 states and 3713 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) [2022-11-16 11:39:02,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:02,543 INFO L93 Difference]: Finished difference Result 1134 states and 3728 transitions. [2022-11-16 11:39:02,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:39:02,543 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 11 [2022-11-16 11:39:02,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:02,546 INFO L225 Difference]: With dead ends: 1134 [2022-11-16 11:39:02,546 INFO L226 Difference]: Without dead ends: 1134 [2022-11-16 11:39:02,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:39:02,547 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:02,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-11-16 11:39:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-11-16 11:39:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1125. [2022-11-16 11:39:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1033 states have (on average 3.594385285575992) internal successors, (3713), 1124 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3713 transitions. [2022-11-16 11:39:02,568 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3713 transitions. Word has length 11 [2022-11-16 11:39:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:02,568 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 3713 transitions. [2022-11-16 11:39:02,569 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) [2022-11-16 11:39:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3713 transitions. [2022-11-16 11:39:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:39:02,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:02,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:02,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:02,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:02,782 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash 88286799, now seen corresponding path program 1 times [2022-11-16 11:39:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:02,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686491726] [2022-11-16 11:39:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:02,783 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 [2022-11-16 11:39:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:02,784 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:02,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:39:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:03,191 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:39:03,192 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 [2022-11-16 11:39:03,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:03,240 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 [2022-11-16 11:39:03,290 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:39:03,290 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 14 treesize of output 20 [2022-11-16 11:39:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:39:03,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:39:03,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686491726] [2022-11-16 11:39:03,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686491726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:39:03,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:39:03,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:39:03,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819601712] [2022-11-16 11:39:03,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:39:03,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:39:03,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:39:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:39:03,372 INFO L87 Difference]: Start difference. First operand 1125 states and 3713 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) [2022-11-16 11:39:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:03,701 INFO L93 Difference]: Finished difference Result 1124 states and 3710 transitions. [2022-11-16 11:39:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:39:03,702 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 11 [2022-11-16 11:39:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:03,704 INFO L225 Difference]: With dead ends: 1124 [2022-11-16 11:39:03,704 INFO L226 Difference]: Without dead ends: 1124 [2022-11-16 11:39:03,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:39:03,705 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:03,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-16 11:39:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-16 11:39:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1118. [2022-11-16 11:39:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1026 states have (on average 3.608187134502924) internal successors, (3702), 1117 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3702 transitions. [2022-11-16 11:39:03,719 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3702 transitions. Word has length 11 [2022-11-16 11:39:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:03,720 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 3702 transitions. [2022-11-16 11:39:03,720 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) [2022-11-16 11:39:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3702 transitions. [2022-11-16 11:39:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:39:03,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:03,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:03,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:39:03,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:03,921 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:03,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash 87899020, now seen corresponding path program 1 times [2022-11-16 11:39:03,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:03,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969383909] [2022-11-16 11:39:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:03,922 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 [2022-11-16 11:39:03,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:03,923 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:03,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:04,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:39:04,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:04,279 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:39:04,279 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:39:04,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:04,326 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 [2022-11-16 11:39:04,377 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:39:04,377 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 [2022-11-16 11:39:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:39:04,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:39:04,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:04,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969383909] [2022-11-16 11:39:04,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969383909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:39:04,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:39:04,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:39:04,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175727030] [2022-11-16 11:39:04,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:39:04,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:39:04,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:04,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:39:04,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:39:04,456 INFO L87 Difference]: Start difference. First operand 1118 states and 3702 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) [2022-11-16 11:39:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:04,774 INFO L93 Difference]: Finished difference Result 1117 states and 3699 transitions. [2022-11-16 11:39:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:39:04,774 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 11 [2022-11-16 11:39:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:04,777 INFO L225 Difference]: With dead ends: 1117 [2022-11-16 11:39:04,777 INFO L226 Difference]: Without dead ends: 1117 [2022-11-16 11:39:04,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:39:04,778 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:04,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-16 11:39:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-16 11:39:04,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1082. [2022-11-16 11:39:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 990 states have (on average 3.6636363636363636) internal successors, (3627), 1081 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3627 transitions. [2022-11-16 11:39:04,797 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3627 transitions. Word has length 11 [2022-11-16 11:39:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:04,797 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 3627 transitions. [2022-11-16 11:39:04,797 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) [2022-11-16 11:39:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3627 transitions. [2022-11-16 11:39:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:39:04,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:04,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:04,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:04,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:04,998 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash 457486862, now seen corresponding path program 1 times [2022-11-16 11:39:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:04,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337276144] [2022-11-16 11:39:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:04,999 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 [2022-11-16 11:39:04,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:05,000 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:05,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:39:05,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:05,299 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:39:05,299 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 [2022-11-16 11:39:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:05,347 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 [2022-11-16 11:39:05,396 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:39:05,396 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 [2022-11-16 11:39:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:39:05,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:39:05,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:05,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337276144] [2022-11-16 11:39:05,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337276144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:39:05,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:39:05,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:39:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581470202] [2022-11-16 11:39:05,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:39:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:39:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:39:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:39:05,516 INFO L87 Difference]: Start difference. First operand 1082 states and 3627 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) [2022-11-16 11:39:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:05,873 INFO L93 Difference]: Finished difference Result 1134 states and 3724 transitions. [2022-11-16 11:39:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:39:05,874 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 11 [2022-11-16 11:39:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:05,876 INFO L225 Difference]: With dead ends: 1134 [2022-11-16 11:39:05,876 INFO L226 Difference]: Without dead ends: 1134 [2022-11-16 11:39:05,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:39:05,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:05,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-16 11:39:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-11-16 11:39:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1107. [2022-11-16 11:39:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1015 states have (on average 3.6246305418719214) internal successors, (3679), 1106 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 3679 transitions. [2022-11-16 11:39:05,915 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 3679 transitions. Word has length 11 [2022-11-16 11:39:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:05,916 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 3679 transitions. [2022-11-16 11:39:05,916 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) [2022-11-16 11:39:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 3679 transitions. [2022-11-16 11:39:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:39:05,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:05,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:05,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:06,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:06,129 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:06,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1056818201, now seen corresponding path program 1 times [2022-11-16 11:39:06,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:06,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506324784] [2022-11-16 11:39:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:06,130 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 [2022-11-16 11:39:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:06,131 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:06,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:39:06,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:06,476 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:39:06,476 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 [2022-11-16 11:39:06,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:06,534 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 [2022-11-16 11:39:06,588 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:39:06,588 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 [2022-11-16 11:39:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:39:06,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:39:06,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:06,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506324784] [2022-11-16 11:39:06,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506324784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:39:06,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:39:06,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:39:06,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307732861] [2022-11-16 11:39:06,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:39:06,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:39:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:39:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:39:06,689 INFO L87 Difference]: Start difference. First operand 1107 states and 3679 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) [2022-11-16 11:39:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:07,042 INFO L93 Difference]: Finished difference Result 1134 states and 3724 transitions. [2022-11-16 11:39:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:39:07,043 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 12 [2022-11-16 11:39:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:07,045 INFO L225 Difference]: With dead ends: 1134 [2022-11-16 11:39:07,045 INFO L226 Difference]: Without dead ends: 1134 [2022-11-16 11:39:07,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:39:07,046 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:07,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-16 11:39:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-11-16 11:39:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1107. [2022-11-16 11:39:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1015 states have (on average 3.6246305418719214) internal successors, (3679), 1106 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 3679 transitions. [2022-11-16 11:39:07,063 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 3679 transitions. Word has length 12 [2022-11-16 11:39:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:07,064 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 3679 transitions. [2022-11-16 11:39:07,064 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) [2022-11-16 11:39:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 3679 transitions. [2022-11-16 11:39:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:39:07,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:07,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:07,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:39:07,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:07,267 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1068886990, now seen corresponding path program 1 times [2022-11-16 11:39:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637846979] [2022-11-16 11:39:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:07,268 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 [2022-11-16 11:39:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:07,291 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:07,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:07,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:39:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:07,748 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:39:07,749 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 [2022-11-16 11:39:07,907 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:39:07,907 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 [2022-11-16 11:39:08,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:08,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:08,102 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:39:08,102 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 [2022-11-16 11:39:08,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:08,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:08,200 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:39:08,200 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 [2022-11-16 11:39:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:39:08,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:39:16,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:16,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637846979] [2022-11-16 11:39:16,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637846979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:16,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:39:16,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:39:16,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429679236] [2022-11-16 11:39:16,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:16,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:39:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:16,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:39:16,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:39:16,985 INFO L87 Difference]: Start difference. First operand 1107 states and 3679 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:39:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:17,399 INFO L93 Difference]: Finished difference Result 1367 states and 4835 transitions. [2022-11-16 11:39:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:39:17,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12 [2022-11-16 11:39:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:17,403 INFO L225 Difference]: With dead ends: 1367 [2022-11-16 11:39:17,403 INFO L226 Difference]: Without dead ends: 1367 [2022-11-16 11:39:17,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:39:17,404 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:17,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2022-11-16 11:39:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-11-16 11:39:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1126. [2022-11-16 11:39:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1034 states have (on average 3.595744680851064) internal successors, (3718), 1125 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 3718 transitions. [2022-11-16 11:39:17,420 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 3718 transitions. Word has length 12 [2022-11-16 11:39:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:17,420 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 3718 transitions. [2022-11-16 11:39:17,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:39:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 3718 transitions. [2022-11-16 11:39:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:39:17,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:17,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:17,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:17,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:17,621 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:17,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:17,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1242623306, now seen corresponding path program 1 times [2022-11-16 11:39:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:17,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405142119] [2022-11-16 11:39:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:17,622 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 [2022-11-16 11:39:17,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:17,623 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:17,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:17,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:39:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:18,048 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:39:18,049 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 [2022-11-16 11:39:18,222 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:39:18,222 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 [2022-11-16 11:39:18,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:18,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:18,410 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:39:18,410 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 [2022-11-16 11:39:18,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:18,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:18,485 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:39:18,486 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 [2022-11-16 11:39:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:18,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:29,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:29,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405142119] [2022-11-16 11:39:29,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405142119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:29,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:39:29,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:39:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156687908] [2022-11-16 11:39:29,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:29,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:39:29,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:39:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:39:29,724 INFO L87 Difference]: Start difference. First operand 1126 states and 3718 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:39:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:30,215 INFO L93 Difference]: Finished difference Result 1306 states and 4461 transitions. [2022-11-16 11:39:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:39:30,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12 [2022-11-16 11:39:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:30,219 INFO L225 Difference]: With dead ends: 1306 [2022-11-16 11:39:30,219 INFO L226 Difference]: Without dead ends: 1306 [2022-11-16 11:39:30,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:39:30,220 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:30,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 191 Unchecked, 0.5s Time] [2022-11-16 11:39:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-11-16 11:39:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1175. [2022-11-16 11:39:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1083 states have (on average 3.69067405355494) internal successors, (3997), 1174 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3997 transitions. [2022-11-16 11:39:30,245 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3997 transitions. Word has length 12 [2022-11-16 11:39:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:30,245 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 3997 transitions. [2022-11-16 11:39:30,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:39:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3997 transitions. [2022-11-16 11:39:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:39:30,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:30,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:30,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:30,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:30,447 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:30,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1615278925, now seen corresponding path program 1 times [2022-11-16 11:39:30,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:30,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635506121] [2022-11-16 11:39:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:30,447 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 [2022-11-16 11:39:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:30,448 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:30,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:30,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:39:30,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:30,920 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:39:30,920 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 [2022-11-16 11:39:31,107 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:39:31,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:39:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:31,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:31,317 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:39:31,318 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 [2022-11-16 11:39:31,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:31,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:31,390 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:39:31,390 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 [2022-11-16 11:39:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:31,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:38,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:38,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635506121] [2022-11-16 11:39:38,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635506121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:38,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:39:38,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:39:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030907911] [2022-11-16 11:39:38,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:39:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:39:38,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:39:38,903 INFO L87 Difference]: Start difference. First operand 1175 states and 3997 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:39:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:39,463 INFO L93 Difference]: Finished difference Result 1377 states and 4709 transitions. [2022-11-16 11:39:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:39:39,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12 [2022-11-16 11:39:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:39,467 INFO L225 Difference]: With dead ends: 1377 [2022-11-16 11:39:39,468 INFO L226 Difference]: Without dead ends: 1377 [2022-11-16 11:39:39,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:39:39,468 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:39,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 195 Unchecked, 0.5s Time] [2022-11-16 11:39:39,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-11-16 11:39:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1208. [2022-11-16 11:39:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1116 states have (on average 3.727598566308244) internal successors, (4160), 1207 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4160 transitions. [2022-11-16 11:39:39,489 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4160 transitions. Word has length 12 [2022-11-16 11:39:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:39,489 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 4160 transitions. [2022-11-16 11:39:39,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:39:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4160 transitions. [2022-11-16 11:39:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:39:39,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:39,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:39,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:39:39,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:39,703 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1616709401, now seen corresponding path program 1 times [2022-11-16 11:39:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:39,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334294648] [2022-11-16 11:39:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:39,704 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 [2022-11-16 11:39:39,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:39,705 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:39,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:39,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:39:39,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:39:40,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:39:40,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:40,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334294648] [2022-11-16 11:39:40,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334294648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:39:40,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:39:40,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:39:40,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344353434] [2022-11-16 11:39:40,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:39:40,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:39:40,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:39:40,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:39:40,080 INFO L87 Difference]: Start difference. First operand 1208 states and 4160 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) [2022-11-16 11:39:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:40,745 INFO L93 Difference]: Finished difference Result 1120 states and 3267 transitions. [2022-11-16 11:39:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:39:40,746 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 12 [2022-11-16 11:39:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:40,749 INFO L225 Difference]: With dead ends: 1120 [2022-11-16 11:39:40,749 INFO L226 Difference]: Without dead ends: 1112 [2022-11-16 11:39:40,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:39:40,750 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:40,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:39:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-11-16 11:39:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1022. [2022-11-16 11:39:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 930 states have (on average 3.3021505376344087) internal successors, (3071), 1021 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3071 transitions. [2022-11-16 11:39:40,770 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3071 transitions. Word has length 12 [2022-11-16 11:39:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:40,770 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 3071 transitions. [2022-11-16 11:39:40,770 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) [2022-11-16 11:39:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3071 transitions. [2022-11-16 11:39:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:39:40,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:40,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:40,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:39:40,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:40,972 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:40,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1616709327, now seen corresponding path program 1 times [2022-11-16 11:39:40,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:40,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039636020] [2022-11-16 11:39:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:40,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:40,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:40,984 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:40,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:39:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:41,438 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:39:41,438 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 [2022-11-16 11:39:41,640 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:39:41,640 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 [2022-11-16 11:39:41,857 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:39:41,857 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 [2022-11-16 11:39:41,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:41,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:41,952 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:39:41,952 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 [2022-11-16 11:39:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:42,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:54,678 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:39:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:54,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:39:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039636020] [2022-11-16 11:39:54,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039636020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:54,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:39:54,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:39:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779012580] [2022-11-16 11:39:54,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:39:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:39:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:39:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:39:54,681 INFO L87 Difference]: Start difference. First operand 1022 states and 3071 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:39:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:54,992 INFO L93 Difference]: Finished difference Result 1031 states and 3097 transitions. [2022-11-16 11:39:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:39:54,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12 [2022-11-16 11:39:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:54,995 INFO L225 Difference]: With dead ends: 1031 [2022-11-16 11:39:54,995 INFO L226 Difference]: Without dead ends: 1031 [2022-11-16 11:39:54,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:39:54,996 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:54,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-11-16 11:39:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-11-16 11:39:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1023. [2022-11-16 11:39:55,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 931 states have (on average 3.3029001074113857) internal successors, (3075), 1022 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3075 transitions. [2022-11-16 11:39:55,009 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3075 transitions. Word has length 12 [2022-11-16 11:39:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:55,009 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 3075 transitions. [2022-11-16 11:39:55,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:39:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3075 transitions. [2022-11-16 11:39:55,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:39:55,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:55,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:55,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-16 11:39:55,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:39:55,215 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:39:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:55,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1826512955, now seen corresponding path program 1 times [2022-11-16 11:39:55,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:39:55,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862287844] [2022-11-16 11:39:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:55,216 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 [2022-11-16 11:39:55,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:39:55,219 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:39:55,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:39:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:39:55,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:55,751 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:39:55,751 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 [2022-11-16 11:39:55,952 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:39:55,953 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 [2022-11-16 11:39:56,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:39:56,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:39:56,143 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:39:56,143 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 [2022-11-16 11:39:56,235 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:39:56,235 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 [2022-11-16 11:39:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:56,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:00,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:00,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862287844] [2022-11-16 11:40:00,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862287844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:00,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:00,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-16 11:40:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589244265] [2022-11-16 11:40:00,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:00,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:40:00,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:40:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:40:00,345 INFO L87 Difference]: Start difference. First operand 1023 states and 3075 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-11-16 11:40:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:00,965 INFO L93 Difference]: Finished difference Result 1142 states and 3573 transitions. [2022-11-16 11:40:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:40:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 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 12 [2022-11-16 11:40:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:00,968 INFO L225 Difference]: With dead ends: 1142 [2022-11-16 11:40:00,968 INFO L226 Difference]: Without dead ends: 1142 [2022-11-16 11:40:00,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:40:00,969 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:00,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 234 Unchecked, 0.6s Time] [2022-11-16 11:40:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-11-16 11:40:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1127. [2022-11-16 11:40:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1035 states have (on average 3.4280193236714975) internal successors, (3548), 1126 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3548 transitions. [2022-11-16 11:40:00,985 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3548 transitions. Word has length 12 [2022-11-16 11:40:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:00,985 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 3548 transitions. [2022-11-16 11:40:00,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-11-16 11:40:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3548 transitions. [2022-11-16 11:40:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:40:00,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:00,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:00,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:40:01,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:01,188 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:40:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1558073921, now seen corresponding path program 1 times [2022-11-16 11:40:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308730119] [2022-11-16 11:40:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:01,189 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 [2022-11-16 11:40:01,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:01,189 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:40:01,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:40:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:40:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:01,580 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:40:01,581 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 [2022-11-16 11:40:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:40:01,651 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 [2022-11-16 11:40:01,736 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:40:01,737 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 [2022-11-16 11:40:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:40:01,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:01,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:01,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308730119] [2022-11-16 11:40:01,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308730119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:01,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:01,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:40:01,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462544080] [2022-11-16 11:40:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:40:01,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:40:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:40:01,871 INFO L87 Difference]: Start difference. First operand 1127 states and 3548 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) [2022-11-16 11:40:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:02,242 INFO L93 Difference]: Finished difference Result 1126 states and 3546 transitions. [2022-11-16 11:40:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:40:02,243 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 12 [2022-11-16 11:40:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:02,246 INFO L225 Difference]: With dead ends: 1126 [2022-11-16 11:40:02,246 INFO L226 Difference]: Without dead ends: 1126 [2022-11-16 11:40:02,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:40:02,247 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:02,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 11:40:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-11-16 11:40:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1082. [2022-11-16 11:40:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 991 states have (on average 3.493440968718466) internal successors, (3462), 1081 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3462 transitions. [2022-11-16 11:40:02,262 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3462 transitions. Word has length 12 [2022-11-16 11:40:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:02,262 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 3462 transitions. [2022-11-16 11:40:02,262 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) [2022-11-16 11:40:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3462 transitions. [2022-11-16 11:40:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:40:02,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:02,263 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-16 11:40:02,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:40:02,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:02,466 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:40:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:02,467 INFO L85 PathProgramCache]: Analyzing trace with hash 666416658, now seen corresponding path program 3 times [2022-11-16 11:40:02,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:02,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098377124] [2022-11-16 11:40:02,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:40:02,467 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 [2022-11-16 11:40:02,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:02,468 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:40:02,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:40:02,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 11:40:02,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:02,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:40:02,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:02,996 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:40:02,997 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 [2022-11-16 11:40:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:03,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:08,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098377124] [2022-11-16 11:40:08,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098377124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:08,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:08,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-16 11:40:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231819675] [2022-11-16 11:40:08,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:08,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:40:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:40:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:40:08,346 INFO L87 Difference]: Start difference. First operand 1082 states and 3462 transitions. Second operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:17,773 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:40:28,359 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 [] [2022-11-16 11:40:30,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:32,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:34,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:36,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:38,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:40,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:42,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:44,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:46,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:48,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:54,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:56,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:58,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:00,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:02,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:04,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:06,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:08,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:10,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:12,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:14,665 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 [] [2022-11-16 11:41:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:36,075 INFO L93 Difference]: Finished difference Result 11168 states and 35626 transitions. [2022-11-16 11:41:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:41:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:41:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:36,108 INFO L225 Difference]: With dead ends: 11168 [2022-11-16 11:41:36,108 INFO L226 Difference]: Without dead ends: 11168 [2022-11-16 11:41:36,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:41:36,109 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4027 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6031 mSolverCounterSat, 481 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4027 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 6031 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:36,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4027 Valid, 0 Invalid, 6534 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [481 Valid, 6031 Invalid, 22 Unknown, 0 Unchecked, 64.9s Time] [2022-11-16 11:41:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11168 states. [2022-11-16 11:41:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11168 to 1097. [2022-11-16 11:41:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1006 states have (on average 3.4711729622266403) internal successors, (3492), 1096 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 3492 transitions. [2022-11-16 11:41:36,181 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 3492 transitions. Word has length 13 [2022-11-16 11:41:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:36,182 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 3492 transitions. [2022-11-16 11:41:36,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 3492 transitions. [2022-11-16 11:41:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:41:36,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:36,182 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:36,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:41:36,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:36,383 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:41:36,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1817710805, now seen corresponding path program 2 times [2022-11-16 11:41:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:36,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529772522] [2022-11-16 11:41:36,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:41:36,384 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 [2022-11-16 11:41:36,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:36,385 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:41:36,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:41:36,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:41:36,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:36,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:41:36,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:36,922 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:41:36,923 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 [2022-11-16 11:41:37,123 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:41:37,123 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 [2022-11-16 11:41:37,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:37,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:41:37,322 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:37,322 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 [2022-11-16 11:41:37,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:37,383 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 [2022-11-16 11:41:37,417 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:37,417 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 [2022-11-16 11:41:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:41:37,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:37,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:37,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529772522] [2022-11-16 11:41:37,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529772522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:37,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:37,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:41:37,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366296739] [2022-11-16 11:41:37,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:41:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:41:37,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:37,766 INFO L87 Difference]: Start difference. First operand 1097 states and 3492 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) [2022-11-16 11:41:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:38,306 INFO L93 Difference]: Finished difference Result 1103 states and 3506 transitions. [2022-11-16 11:41:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:38,307 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 13 [2022-11-16 11:41:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:38,310 INFO L225 Difference]: With dead ends: 1103 [2022-11-16 11:41:38,310 INFO L226 Difference]: Without dead ends: 1103 [2022-11-16 11:41:38,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:41:38,310 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:38,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-11-16 11:41:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-11-16 11:41:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1072. [2022-11-16 11:41:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 981 states have (on average 3.502548419979613) internal successors, (3436), 1071 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3436 transitions. [2022-11-16 11:41:38,327 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3436 transitions. Word has length 13 [2022-11-16 11:41:38,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:38,327 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 3436 transitions. [2022-11-16 11:41:38,327 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) [2022-11-16 11:41:38,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3436 transitions. [2022-11-16 11:41:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:41:38,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:38,328 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:38,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-16 11:41:38,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:38,528 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:41:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash 967872718, now seen corresponding path program 1 times [2022-11-16 11:41:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:38,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690936800] [2022-11-16 11:41:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:38,529 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 [2022-11-16 11:41:38,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:38,531 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:41:38,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:41:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:38,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:41:38,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:38,974 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:41:38,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:41:39,121 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 17 treesize of output 13 [2022-11-16 11:41:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:39,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:39,665 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 35 treesize of output 31 [2022-11-16 11:41:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:41,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:41,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690936800] [2022-11-16 11:41:41,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690936800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:41,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:41,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:41:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025299196] [2022-11-16 11:41:41,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:41,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:41:41,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:41:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:41:41,281 INFO L87 Difference]: Start difference. First operand 1072 states and 3436 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:44,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:52,196 INFO L93 Difference]: Finished difference Result 1396 states and 4146 transitions. [2022-11-16 11:41:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:41:52,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:41:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:52,201 INFO L225 Difference]: With dead ends: 1396 [2022-11-16 11:41:52,201 INFO L226 Difference]: Without dead ends: 1396 [2022-11-16 11:41:52,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:41:52,202 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 115 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:52,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 0 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 578 Invalid, 0 Unknown, 28 Unchecked, 7.3s Time] [2022-11-16 11:41:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-11-16 11:41:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1128. [2022-11-16 11:41:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1037 states have (on average 3.450337512054002) internal successors, (3578), 1127 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3578 transitions. [2022-11-16 11:41:52,231 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3578 transitions. Word has length 13 [2022-11-16 11:41:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:52,231 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 3578 transitions. [2022-11-16 11:41:52,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3578 transitions. [2022-11-16 11:41:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:41:52,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:52,232 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:52,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:41:52,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:52,433 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:41:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:52,433 INFO L85 PathProgramCache]: Analyzing trace with hash 758069209, now seen corresponding path program 2 times [2022-11-16 11:41:52,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:52,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669480034] [2022-11-16 11:41:52,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:41:52,434 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 [2022-11-16 11:41:52,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:52,434 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:41:52,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:41:52,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:41:52,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:52,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:41:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:52,927 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:41:52,927 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 [2022-11-16 11:41:53,139 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:41:53,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:41:53,305 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:53,305 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 [2022-11-16 11:41:53,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:41:53,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:53,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:41:53,386 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:53,387 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 [2022-11-16 11:41:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:41:53,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:53,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:53,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669480034] [2022-11-16 11:41:53,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669480034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:53,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:53,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:41:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545003631] [2022-11-16 11:41:53,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:53,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:53,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:53,515 INFO L87 Difference]: Start difference. First operand 1128 states and 3578 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) [2022-11-16 11:41:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:54,066 INFO L93 Difference]: Finished difference Result 795 states and 2441 transitions. [2022-11-16 11:41:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:41:54,067 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 13 [2022-11-16 11:41:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:54,069 INFO L225 Difference]: With dead ends: 795 [2022-11-16 11:41:54,069 INFO L226 Difference]: Without dead ends: 794 [2022-11-16 11:41:54,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:54,069 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:54,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:41:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-16 11:41:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 608. [2022-11-16 11:41:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 572 states have (on average 3.089160839160839) internal successors, (1767), 607 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1767 transitions. [2022-11-16 11:41:54,092 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1767 transitions. Word has length 13 [2022-11-16 11:41:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:54,092 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 1767 transitions. [2022-11-16 11:41:54,092 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) [2022-11-16 11:41:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1767 transitions. [2022-11-16 11:41:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:41:54,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:54,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:54,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-16 11:41:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:54,293 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:41:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash -787325427, now seen corresponding path program 1 times [2022-11-16 11:41:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:54,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624615491] [2022-11-16 11:41:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:54,295 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 [2022-11-16 11:41:54,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:54,295 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:41:54,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:41:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:54,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:41:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:54,588 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 8 treesize of output 7 [2022-11-16 11:41:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:41:54,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:41:56,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:56,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624615491] [2022-11-16 11:41:56,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624615491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:56,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:56,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:41:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607818878] [2022-11-16 11:41:56,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:56,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:41:56,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:56,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:41:56,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:41:56,207 INFO L87 Difference]: Start difference. First operand 608 states and 1767 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:58,212 INFO L93 Difference]: Finished difference Result 778 states and 2492 transitions. [2022-11-16 11:41:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:41:58,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:41:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:58,215 INFO L225 Difference]: With dead ends: 778 [2022-11-16 11:41:58,215 INFO L226 Difference]: Without dead ends: 778 [2022-11-16 11:41:58,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:41:58,215 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:58,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 145 Unchecked, 0.7s Time] [2022-11-16 11:41:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-11-16 11:41:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 734. [2022-11-16 11:41:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 698 states have (on average 3.3796561604584525) internal successors, (2359), 733 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2359 transitions. [2022-11-16 11:41:58,227 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2359 transitions. Word has length 13 [2022-11-16 11:41:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:58,227 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 2359 transitions. [2022-11-16 11:41:58,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2359 transitions. [2022-11-16 11:41:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:41:58,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:58,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:58,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-16 11:41:58,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:58,440 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:41:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1407061625, now seen corresponding path program 1 times [2022-11-16 11:41:58,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:58,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093800304] [2022-11-16 11:41:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:58,441 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 [2022-11-16 11:41:58,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:58,441 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:41:58,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:41:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:58,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:41:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:58,782 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 8 treesize of output 7 [2022-11-16 11:41:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:41:59,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:00,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:00,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093800304] [2022-11-16 11:42:00,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093800304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:00,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:00,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:42:00,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193917877] [2022-11-16 11:42:00,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:42:00,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:42:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:42:00,523 INFO L87 Difference]: Start difference. First operand 734 states and 2359 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:02,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:02,607 INFO L93 Difference]: Finished difference Result 790 states and 2518 transitions. [2022-11-16 11:42:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:42:02,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:42:02,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:02,610 INFO L225 Difference]: With dead ends: 790 [2022-11-16 11:42:02,610 INFO L226 Difference]: Without dead ends: 790 [2022-11-16 11:42:02,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:42:02,611 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:02,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 106 Unchecked, 0.8s Time] [2022-11-16 11:42:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-16 11:42:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 761. [2022-11-16 11:42:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 725 states have (on average 3.3834482758620688) internal successors, (2453), 760 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2453 transitions. [2022-11-16 11:42:02,628 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2453 transitions. Word has length 14 [2022-11-16 11:42:02,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:02,629 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 2453 transitions. [2022-11-16 11:42:02,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:02,629 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2453 transitions. [2022-11-16 11:42:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:42:02,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:02,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:02,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:42:02,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:02,843 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:42:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1362716373, now seen corresponding path program 1 times [2022-11-16 11:42:02,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:02,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461417353] [2022-11-16 11:42:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:02,844 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 [2022-11-16 11:42:02,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:02,845 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:42:02,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:03,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:42:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:03,151 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 8 treesize of output 7 [2022-11-16 11:42:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:03,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:04,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:04,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461417353] [2022-11-16 11:42:04,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461417353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:04,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:04,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:42:04,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700666288] [2022-11-16 11:42:04,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:04,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:42:04,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:42:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:42:04,985 INFO L87 Difference]: Start difference. First operand 761 states and 2453 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:07,454 INFO L93 Difference]: Finished difference Result 915 states and 3034 transitions. [2022-11-16 11:42:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:42:07,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:42:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:07,458 INFO L225 Difference]: With dead ends: 915 [2022-11-16 11:42:07,458 INFO L226 Difference]: Without dead ends: 915 [2022-11-16 11:42:07,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:42:07,459 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:07,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 144 Unchecked, 0.5s Time] [2022-11-16 11:42:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-16 11:42:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 859. [2022-11-16 11:42:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 823 states have (on average 3.469015795868773) internal successors, (2855), 858 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2855 transitions. [2022-11-16 11:42:07,481 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2855 transitions. Word has length 14 [2022-11-16 11:42:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:07,481 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 2855 transitions. [2022-11-16 11:42:07,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2855 transitions. [2022-11-16 11:42:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:42:07,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:07,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:07,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:07,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:07,696 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:42:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:07,697 INFO L85 PathProgramCache]: Analyzing trace with hash 669238249, now seen corresponding path program 1 times [2022-11-16 11:42:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:07,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59631806] [2022-11-16 11:42:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:07,697 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 [2022-11-16 11:42:07,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:07,698 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:42:07,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:42:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:08,001 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 8 treesize of output 7 [2022-11-16 11:42:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:08,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:09,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:09,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59631806] [2022-11-16 11:42:09,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59631806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:09,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:09,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:42:09,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784207797] [2022-11-16 11:42:09,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:09,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:42:09,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:09,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:42:09,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:42:09,764 INFO L87 Difference]: Start difference. First operand 859 states and 2855 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:12,349 INFO L93 Difference]: Finished difference Result 925 states and 3003 transitions. [2022-11-16 11:42:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:42:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:42:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:12,352 INFO L225 Difference]: With dead ends: 925 [2022-11-16 11:42:12,352 INFO L226 Difference]: Without dead ends: 925 [2022-11-16 11:42:12,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:42:12,353 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:12,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 94 Unchecked, 0.6s Time] [2022-11-16 11:42:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-11-16 11:42:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 882. [2022-11-16 11:42:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 846 states have (on average 3.4491725768321513) internal successors, (2918), 881 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2918 transitions. [2022-11-16 11:42:12,374 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2918 transitions. Word has length 15 [2022-11-16 11:42:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:12,374 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 2918 transitions. [2022-11-16 11:42:12,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2918 transitions. [2022-11-16 11:42:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:42:12,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:12,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:12,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-16 11:42:12,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:12,589 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:42:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash -705459672, now seen corresponding path program 1 times [2022-11-16 11:42:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:12,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698186369] [2022-11-16 11:42:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:12,590 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 [2022-11-16 11:42:12,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:12,591 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:42:12,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:12,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:42:12,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:13,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 25 [2022-11-16 11:42:13,337 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 9 treesize of output 7 [2022-11-16 11:42:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:13,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:13,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:13,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 180 [2022-11-16 11:42:13,745 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 180 treesize of output 178 [2022-11-16 11:42:13,757 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 178 treesize of output 176 [2022-11-16 11:42:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:14,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:14,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698186369] [2022-11-16 11:42:14,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698186369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:14,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:14,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:42:14,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662914959] [2022-11-16 11:42:14,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:14,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:42:14,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:14,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:42:14,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:42:14,845 INFO L87 Difference]: Start difference. First operand 882 states and 2918 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:17,718 INFO L93 Difference]: Finished difference Result 1067 states and 3301 transitions. [2022-11-16 11:42:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:42:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:42:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:17,723 INFO L225 Difference]: With dead ends: 1067 [2022-11-16 11:42:17,724 INFO L226 Difference]: Without dead ends: 1049 [2022-11-16 11:42:17,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:42:17,724 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 125 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:17,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 0 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 11:42:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-11-16 11:42:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 945. [2022-11-16 11:42:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 908 states have (on average 3.3755506607929515) internal successors, (3065), 944 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3065 transitions. [2022-11-16 11:42:17,745 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3065 transitions. Word has length 15 [2022-11-16 11:42:17,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:17,745 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 3065 transitions. [2022-11-16 11:42:17,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3065 transitions. [2022-11-16 11:42:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:42:17,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:17,746 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:17,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-16 11:42:17,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:17,951 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:42:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1622823245, now seen corresponding path program 2 times [2022-11-16 11:42:17,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:17,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469957430] [2022-11-16 11:42:17,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:42:17,952 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 [2022-11-16 11:42:17,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:17,953 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:42:17,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:18,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:42:18,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:18,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:42:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:18,265 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 8 treesize of output 7 [2022-11-16 11:42:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:42:18,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:42:18,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469957430] [2022-11-16 11:42:18,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469957430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:18,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:18,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:42:18,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974728344] [2022-11-16 11:42:18,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:18,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:18,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:18,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:18,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:18,462 INFO L87 Difference]: Start difference. First operand 945 states and 3065 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) 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) [2022-11-16 11:42:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:18,919 INFO L93 Difference]: Finished difference Result 793 states and 2509 transitions. [2022-11-16 11:42:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:42:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) 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 15 [2022-11-16 11:42:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:18,922 INFO L225 Difference]: With dead ends: 793 [2022-11-16 11:42:18,922 INFO L226 Difference]: Without dead ends: 789 [2022-11-16 11:42:18,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:18,923 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:18,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:42:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-16 11:42:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 509. [2022-11-16 11:42:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 491 states have (on average 2.835030549898167) internal successors, (1392), 508 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1392 transitions. [2022-11-16 11:42:18,935 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1392 transitions. Word has length 15 [2022-11-16 11:42:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:18,935 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 1392 transitions. [2022-11-16 11:42:18,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) 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) [2022-11-16 11:42:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1392 transitions. [2022-11-16 11:42:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:42:18,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:18,936 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:18,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:19,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:19,143 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:42:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash 703072660, now seen corresponding path program 2 times [2022-11-16 11:42:19,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:19,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824966750] [2022-11-16 11:42:19,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:42:19,144 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 [2022-11-16 11:42:19,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:19,145 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:42:19,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:19,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:42:19,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:42:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:19,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 25 [2022-11-16 11:42:19,724 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 9 treesize of output 7 [2022-11-16 11:42:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:42:19,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:42:19,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:19,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824966750] [2022-11-16 11:42:19,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824966750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:19,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:19,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:42:19,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634046244] [2022-11-16 11:42:19,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:19,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:19,914 INFO L87 Difference]: Start difference. First operand 509 states and 1392 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) [2022-11-16 11:42:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:20,681 INFO L93 Difference]: Finished difference Result 516 states and 1401 transitions. [2022-11-16 11:42:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:20,682 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 16 [2022-11-16 11:42:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:20,683 INFO L225 Difference]: With dead ends: 516 [2022-11-16 11:42:20,683 INFO L226 Difference]: Without dead ends: 512 [2022-11-16 11:42:20,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:20,683 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:20,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:42:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-16 11:42:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 505. [2022-11-16 11:42:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 487 states have (on average 2.8275154004106775) internal successors, (1377), 504 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1377 transitions. [2022-11-16 11:42:20,697 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1377 transitions. Word has length 16 [2022-11-16 11:42:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:20,697 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 1377 transitions. [2022-11-16 11:42:20,697 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) [2022-11-16 11:42:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1377 transitions. [2022-11-16 11:42:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:42:20,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:20,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:20,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:42:20,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:20,903 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:42:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1279111334, now seen corresponding path program 1 times [2022-11-16 11:42:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547785509] [2022-11-16 11:42:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:20,904 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 [2022-11-16 11:42:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:20,904 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:42:20,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:42:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:21,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:42:21,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:21,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547785509] [2022-11-16 11:42:21,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547785509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:21,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:21,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:42:21,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263217813] [2022-11-16 11:42:21,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:21,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:42:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:21,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:42:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:42:21,154 INFO L87 Difference]: Start difference. First operand 505 states and 1377 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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) [2022-11-16 11:42:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:21,434 INFO L93 Difference]: Finished difference Result 497 states and 1360 transitions. [2022-11-16 11:42:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:42:21,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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 16 [2022-11-16 11:42:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:21,436 INFO L225 Difference]: With dead ends: 497 [2022-11-16 11:42:21,436 INFO L226 Difference]: Without dead ends: 419 [2022-11-16 11:42:21,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:42:21,436 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:21,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:42:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-16 11:42:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 386. [2022-11-16 11:42:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 372 states have (on average 2.956989247311828) internal successors, (1100), 385 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1100 transitions. [2022-11-16 11:42:21,444 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1100 transitions. Word has length 16 [2022-11-16 11:42:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:21,444 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 1100 transitions. [2022-11-16 11:42:21,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 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) [2022-11-16 11:42:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1100 transitions. [2022-11-16 11:42:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:42:21,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:21,445 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2022-11-16 11:42:21,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:21,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:21,657 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:42:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash -853911222, now seen corresponding path program 1 times [2022-11-16 11:42:21,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:21,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959333439] [2022-11-16 11:42:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:21,658 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 [2022-11-16 11:42:21,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:21,659 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:42:21,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:42:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:21,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:42:21,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:21,962 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 8 treesize of output 7 [2022-11-16 11:42:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:23,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:30,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:30,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959333439] [2022-11-16 11:42:30,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959333439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:30,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:30,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-16 11:42:30,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762431333] [2022-11-16 11:42:30,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:30,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:42:30,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:42:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:42:30,323 INFO L87 Difference]: Start difference. First operand 386 states and 1100 transitions. Second operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:47,137 WARN L233 SmtUtils]: Spent 11.20s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:42:49,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:42:51,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:42:53,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:42:55,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:42:57,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:42:59,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:01,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:03,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:05,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:07,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:09,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:11,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:13,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:17,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:19,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:21,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:23,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:25,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:27,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:29,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:31,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:33,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:35,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:37,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:39,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:41,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:52,294 WARN L233 SmtUtils]: Spent 9.61s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:00,807 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:07,804 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:50,817 INFO L93 Difference]: Finished difference Result 7691 states and 24320 transitions. [2022-11-16 11:44:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:44:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:44:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:50,844 INFO L225 Difference]: With dead ends: 7691 [2022-11-16 11:44:50,844 INFO L226 Difference]: Without dead ends: 7691 [2022-11-16 11:44:50,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=643, Invalid=1163, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:44:50,845 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5489 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6493 mSolverCounterSat, 590 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5489 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 6493 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:50,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5489 Valid, 0 Invalid, 7109 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [590 Valid, 6493 Invalid, 26 Unknown, 0 Unchecked, 86.4s Time] [2022-11-16 11:44:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7691 states. [2022-11-16 11:44:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7691 to 416. [2022-11-16 11:44:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 402 states have (on average 2.8482587064676617) internal successors, (1145), 415 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1145 transitions. [2022-11-16 11:44:50,890 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1145 transitions. Word has length 17 [2022-11-16 11:44:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:50,890 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1145 transitions. [2022-11-16 11:44:50,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1145 transitions. [2022-11-16 11:44:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:44:50,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:50,891 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:50,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:44:51,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:51,092 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:44:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1343134223, now seen corresponding path program 1 times [2022-11-16 11:44:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:44:51,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497265229] [2022-11-16 11:44:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:51,093 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 [2022-11-16 11:44:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:44:51,094 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:44:51,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:44:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:51,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:44:51,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:44:51,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:44:51,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:44:51,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497265229] [2022-11-16 11:44:51,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497265229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:51,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:51,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:51,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559621374] [2022-11-16 11:44:51,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:51,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:44:51,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:44:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:44:51,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:44:51,668 INFO L87 Difference]: Start difference. First operand 416 states and 1145 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:52,178 INFO L93 Difference]: Finished difference Result 502 states and 1277 transitions. [2022-11-16 11:44:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:44:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:44:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:52,181 INFO L225 Difference]: With dead ends: 502 [2022-11-16 11:44:52,181 INFO L226 Difference]: Without dead ends: 475 [2022-11-16 11:44:52,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:44:52,181 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:52,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:44:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-16 11:44:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 416. [2022-11-16 11:44:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 402 states have (on average 2.8482587064676617) internal successors, (1145), 415 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1145 transitions. [2022-11-16 11:44:52,188 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1145 transitions. Word has length 18 [2022-11-16 11:44:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:52,188 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1145 transitions. [2022-11-16 11:44:52,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1145 transitions. [2022-11-16 11:44:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:44:52,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:52,188 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:52,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:44:52,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:52,389 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:44:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1761800194, now seen corresponding path program 1 times [2022-11-16 11:44:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:44:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404759962] [2022-11-16 11:44:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:52,390 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 [2022-11-16 11:44:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:44:52,391 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:44:52,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:44:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:53,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:44:53,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:53,086 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 [2022-11-16 11:44:53,139 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:44:53,139 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 [2022-11-16 11:44:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:44:53,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:44:53,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:44:53,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404759962] [2022-11-16 11:44:53,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404759962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:53,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:53,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:44:53,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670347438] [2022-11-16 11:44:53,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:53,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:44:53,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:44:53,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:44:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:44:53,197 INFO L87 Difference]: Start difference. First operand 416 states and 1145 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:53,523 INFO L93 Difference]: Finished difference Result 336 states and 877 transitions. [2022-11-16 11:44:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:44:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-16 11:44:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:53,525 INFO L225 Difference]: With dead ends: 336 [2022-11-16 11:44:53,525 INFO L226 Difference]: Without dead ends: 336 [2022-11-16 11:44:53,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:44:53,525 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:53,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:44:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-16 11:44:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-11-16 11:44:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 328 states have (on average 2.673780487804878) internal successors, (877), 335 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 877 transitions. [2022-11-16 11:44:53,530 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 877 transitions. Word has length 19 [2022-11-16 11:44:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:53,530 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 877 transitions. [2022-11-16 11:44:53,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 877 transitions. [2022-11-16 11:44:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:44:53,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:53,531 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:53,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-16 11:44:53,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:53,731 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:44:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1761800193, now seen corresponding path program 1 times [2022-11-16 11:44:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:44:53,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523941649] [2022-11-16 11:44:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:53,732 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 [2022-11-16 11:44:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:44:53,733 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:44:53,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:44:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:54,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:44:54,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:54,439 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 [2022-11-16 11:44:54,458 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 8 treesize of output 7 [2022-11-16 11:44:54,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:44:54,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:44:54,616 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:44:54,616 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 [2022-11-16 11:44:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:44:54,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:44:59,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:44:59,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523941649] [2022-11-16 11:44:59,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523941649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:59,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:44:59,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:44:59,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921361443] [2022-11-16 11:44:59,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:59,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:44:59,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:44:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:44:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:44:59,321 INFO L87 Difference]: Start difference. First operand 336 states and 877 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:59,873 INFO L93 Difference]: Finished difference Result 582 states and 1369 transitions. [2022-11-16 11:44:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:44:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-11-16 11:44:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:59,875 INFO L225 Difference]: With dead ends: 582 [2022-11-16 11:44:59,875 INFO L226 Difference]: Without dead ends: 517 [2022-11-16 11:44:59,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:44:59,875 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:59,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 169 Unchecked, 0.5s Time] [2022-11-16 11:44:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-16 11:44:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 416. [2022-11-16 11:44:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 408 states have (on average 2.6348039215686274) internal successors, (1075), 415 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1075 transitions. [2022-11-16 11:44:59,881 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1075 transitions. Word has length 19 [2022-11-16 11:44:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:59,881 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1075 transitions. [2022-11-16 11:44:59,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1075 transitions. [2022-11-16 11:44:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:44:59,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:59,882 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:59,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:45:00,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:45:00,083 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:45:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1929776671, now seen corresponding path program 2 times [2022-11-16 11:45:00,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:45:00,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582177272] [2022-11-16 11:45:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:45:00,083 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 [2022-11-16 11:45:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:45:00,084 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:45:00,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:45:00,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:45:00,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:00,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:45:00,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:00,501 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 [2022-11-16 11:45:00,517 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 8 treesize of output 7 [2022-11-16 11:45:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:45:00,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:45:00,641 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:45:00,641 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 [2022-11-16 11:45:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:45:00,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:45:00,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:45:00,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582177272] [2022-11-16 11:45:00,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582177272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:00,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:00,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:45:00,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054717441] [2022-11-16 11:45:00,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:00,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:45:00,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:45:00,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:45:00,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:45:00,851 INFO L87 Difference]: Start difference. First operand 416 states and 1075 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:01,294 INFO L93 Difference]: Finished difference Result 348 states and 849 transitions. [2022-11-16 11:45:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:45:01,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-16 11:45:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:01,296 INFO L225 Difference]: With dead ends: 348 [2022-11-16 11:45:01,296 INFO L226 Difference]: Without dead ends: 348 [2022-11-16 11:45:01,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:45:01,297 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:01,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:45:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-16 11:45:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2022-11-16 11:45:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 264 states have (on average 2.465909090909091) internal successors, (651), 267 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 651 transitions. [2022-11-16 11:45:01,301 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 651 transitions. Word has length 21 [2022-11-16 11:45:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:01,301 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 651 transitions. [2022-11-16 11:45:01,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 651 transitions. [2022-11-16 11:45:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:45:01,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:01,302 INFO L195 NwaCegarLoop]: trace histogram [18, 1, 1, 1] [2022-11-16 11:45:01,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:45:01,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:45:01,502 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:45:01,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:01,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1370276318, now seen corresponding path program 2 times [2022-11-16 11:45:01,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:45:01,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944993797] [2022-11-16 11:45:01,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:45:01,503 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 [2022-11-16 11:45:01,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:45:01,504 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:45:01,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:45:01,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:45:01,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:45:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:01,863 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 8 treesize of output 7 [2022-11-16 11:45:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:03,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:14,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:45:14,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944993797] [2022-11-16 11:45:14,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944993797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:14,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:45:14,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2022-11-16 11:45:14,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173162995] [2022-11-16 11:45:14,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:14,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:45:14,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:45:14,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:45:14,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:45:14,883 INFO L87 Difference]: Start difference. First operand 268 states and 651 transitions. Second operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:38,942 WARN L233 SmtUtils]: Spent 12.39s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:45:42,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:44,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:46,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:48,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:50,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:52,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:54,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:56,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:58,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:00,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:02,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:04,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:06,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:08,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:10,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:12,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:14,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:16,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:31,108 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:46:47,142 WARN L233 SmtUtils]: Spent 13.77s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:46:49,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:51,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:53,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:55,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:57,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:59,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:01,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:03,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:05,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:07,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:09,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:11,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:13,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:15,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:17,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:19,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:21,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:23,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:35,234 WARN L233 SmtUtils]: Spent 9.76s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:47:49,007 WARN L233 SmtUtils]: Spent 11.39s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:47:58,232 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:48:06,782 WARN L233 SmtUtils]: Spent 6.51s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:48:14,750 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:48:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:50,202 INFO L93 Difference]: Finished difference Result 3025 states and 8958 transitions. [2022-11-16 11:48:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:48:50,204 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2022-11-16 11:48:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:50,210 INFO L225 Difference]: With dead ends: 3025 [2022-11-16 11:48:50,210 INFO L226 Difference]: Without dead ends: 3025 [2022-11-16 11:48:50,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 120.8s TimeCoverageRelationStatistics Valid=1158, Invalid=2148, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 11:48:50,210 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5735 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10584 mSolverCounterSat, 1114 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5735 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 10584 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:50,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5735 Valid, 0 Invalid, 11734 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1114 Valid, 10584 Invalid, 36 Unknown, 0 Unchecked, 105.5s Time] [2022-11-16 11:48:50,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2022-11-16 11:48:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 308. [2022-11-16 11:48:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 304 states have (on average 2.4046052631578947) internal successors, (731), 307 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 731 transitions. [2022-11-16 11:48:50,229 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 731 transitions. Word has length 21 [2022-11-16 11:48:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:50,229 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 731 transitions. [2022-11-16 11:48:50,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 731 transitions. [2022-11-16 11:48:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:48:50,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:50,230 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1] [2022-11-16 11:48:50,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:48:50,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:48:50,431 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 11:48:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1259147134, now seen corresponding path program 4 times [2022-11-16 11:48:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:48:50,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950385318] [2022-11-16 11:48:50,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:48:50,432 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 [2022-11-16 11:48:50,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:48:50,433 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:48:50,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9cb77b3-b81f-4089-ba8a-bd8bff02e0a3/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:48:50,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:48:50,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 11:48:50,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:50,987 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:48:50,988 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 [2022-11-16 11:48:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:53,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:49:12,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:49:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950385318] [2022-11-16 11:49:12,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950385318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:12,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:12,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2022-11-16 11:49:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261294998] [2022-11-16 11:49:12,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:12,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 11:49:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:49:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 11:49:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=1926, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:49:12,343 INFO L87 Difference]: Start difference. First operand 308 states and 731 transitions. Second operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:01,681 WARN L233 SmtUtils]: Spent 24.85s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:50:28,726 WARN L233 SmtUtils]: Spent 23.41s on a formula simplification that was a NOOP. DAG size: 265 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)