./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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_474333b3-30eb-46f5-8833-865d8a0a42ae/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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:56:25,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:56:25,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:56:25,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:56:25,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:56:25,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:56:25,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:56:25,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:56:25,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:56:25,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:56:25,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:56:25,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:56:25,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:56:25,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:56:25,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:56:25,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:56:25,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:56:25,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:56:25,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:56:25,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:56:25,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:56:25,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:56:25,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:56:25,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:56:25,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:56:25,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:56:25,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:56:25,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:56:25,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:56:25,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:56:25,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:56:25,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:56:25,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:56:25,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:56:25,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:56:25,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:56:25,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:56:25,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:56:25,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:56:25,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:56:25,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:56:25,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:56:25,913 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:56:25,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:56:25,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:56:25,914 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:56:25,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:56:25,915 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:56:25,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:56:25,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:56:25,916 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:56:25,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:56:25,918 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:56:25,918 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:56:25,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:56:25,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:56:25,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:56:25,919 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:56:25,919 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:56:25,919 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:56:25,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:56:25,919 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:56:25,919 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:56:25,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:56:25,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:56:25,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:56:25,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:56:25,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:56:25,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:56:25,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:56:25,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:56:25,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:56:25,921 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_474333b3-30eb-46f5-8833-865d8a0a42ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-16 11:56:26,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:56:26,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:56:26,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:56:26,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:56:26,265 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:56:26,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-16 11:56:26,348 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data/8e444be3e/5c21bfb17be4490ea63cc247f81326c6/FLAGd88006356 [2022-11-16 11:56:26,858 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:56:26,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-16 11:56:26,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data/8e444be3e/5c21bfb17be4490ea63cc247f81326c6/FLAGd88006356 [2022-11-16 11:56:27,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data/8e444be3e/5c21bfb17be4490ea63cc247f81326c6 [2022-11-16 11:56:27,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:56:27,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:56:27,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:56:27,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:56:27,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:56:27,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:56:27" (1/1) ... [2022-11-16 11:56:27,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5532b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:27, skipping insertion in model container [2022-11-16 11:56:27,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:56:27" (1/1) ... [2022-11-16 11:56:27,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:56:27,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:56:27,525 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_474333b3-30eb-46f5-8833-865d8a0a42ae/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-16 11:56:27,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:56:27,544 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 11:56:27,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d29a781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:27, skipping insertion in model container [2022-11-16 11:56:27,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:56:27,545 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 11:56:27,547 INFO L158 Benchmark]: Toolchain (without parser) took 302.60ms. Allocated memory is still 117.4MB. Free memory was 77.5MB in the beginning and 92.7MB in the end (delta: -15.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:56:27,548 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 93.9MB in the beginning and 93.8MB in the end (delta: 70.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:56:27,548 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.59ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 92.7MB in the end (delta: -15.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:56:27,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 93.9MB in the beginning and 93.8MB in the end (delta: 70.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.59ms. Allocated memory is still 117.4MB. Free memory was 77.3MB in the beginning and 92.7MB in the end (delta: -15.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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_474333b3-30eb-46f5-8833-865d8a0a42ae/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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:56:29,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:56:29,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:56:29,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:56:29,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:56:29,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:56:29,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:56:29,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:56:29,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:56:29,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:56:29,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:56:29,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:56:29,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:56:29,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:56:29,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:56:29,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:56:29,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:56:29,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:56:29,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:56:29,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:56:29,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:56:29,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:56:29,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:56:29,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:56:29,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:56:29,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:56:29,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:56:29,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:56:29,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:56:29,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:56:29,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:56:29,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:56:29,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:56:29,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:56:29,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:56:29,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:56:29,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:56:29,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:56:29,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:56:29,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:56:29,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:56:29,758 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 11:56:29,808 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:56:29,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:56:29,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:56:29,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:56:29,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:56:29,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:56:29,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:56:29,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:56:29,812 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:56:29,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:56:29,813 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:56:29,813 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:56:29,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:56:29,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:56:29,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:56:29,814 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:56:29,814 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:56:29,814 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:56:29,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:56:29,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:56:29,815 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:56:29,815 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:56:29,815 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:56:29,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:56:29,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:56:29,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:56:29,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:56:29,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:56:29,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:56:29,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:56:29,817 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:56:29,817 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:56:29,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:56:29,818 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_474333b3-30eb-46f5-8833-865d8a0a42ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-16 11:56:30,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:56:30,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:56:30,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:56:30,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:56:30,271 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:56:30,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-16 11:56:30,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data/7903e3148/ed90c1e2e0bb4a19b96114f4d79dde9a/FLAG6541942bb [2022-11-16 11:56:30,944 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:56:30,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-16 11:56:30,956 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data/7903e3148/ed90c1e2e0bb4a19b96114f4d79dde9a/FLAG6541942bb [2022-11-16 11:56:31,331 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/data/7903e3148/ed90c1e2e0bb4a19b96114f4d79dde9a [2022-11-16 11:56:31,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:56:31,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:56:31,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:56:31,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:56:31,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:56:31,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1547971b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31, skipping insertion in model container [2022-11-16 11:56:31,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:56:31,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:56:31,602 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_474333b3-30eb-46f5-8833-865d8a0a42ae/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-16 11:56:31,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:56:31,659 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 11:56:31,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:56:31,691 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_474333b3-30eb-46f5-8833-865d8a0a42ae/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-16 11:56:31,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:56:31,716 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:56:31,754 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_474333b3-30eb-46f5-8833-865d8a0a42ae/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-16 11:56:31,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:56:31,790 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:56:31,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31 WrapperNode [2022-11-16 11:56:31,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:56:31,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:56:31,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:56:31,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:56:31,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,860 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-11-16 11:56:31,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:56:31,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:56:31,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:56:31,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:56:31,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,914 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:56:31,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:56:31,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:56:31,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:56:31,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (1/1) ... [2022-11-16 11:56:31,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:56:31,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:31,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:56:31,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:56:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:56:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 11:56:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:56:32,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 11:56:32,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:56:32,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:56:32,016 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:56:32,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:56:32,016 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:56:32,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:56:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:56:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:56:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:56:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:56:32,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:56:32,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:56:32,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 11:56:32,020 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 11:56:32,180 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:56:32,185 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:56:32,859 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:56:32,995 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:56:32,996 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:56:32,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:56:32 BoogieIcfgContainer [2022-11-16 11:56:32,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:56:33,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:56:33,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:56:33,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:56:33,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:56:31" (1/3) ... [2022-11-16 11:56:33,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e98f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:56:33, skipping insertion in model container [2022-11-16 11:56:33,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:31" (2/3) ... [2022-11-16 11:56:33,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e98f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:56:33, skipping insertion in model container [2022-11-16 11:56:33,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:56:32" (3/3) ... [2022-11-16 11:56:33,008 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2022-11-16 11:56:33,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:56:33,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-16 11:56:33,050 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:56:33,273 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:56:33,331 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:56:33,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 180 transitions, 384 flow [2022-11-16 11:56:33,363 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 180 transitions, 384 flow [2022-11-16 11:56:33,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-11-16 11:56:33,479 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-11-16 11:56:33,480 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:56:33,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 12/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-11-16 11:56:33,498 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-16 11:57:04,641 INFO L134 LiptonReduction]: Checked pairs total: 3680 [2022-11-16 11:57:04,641 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-11-16 11:57:04,649 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-11-16 11:57:04,775 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:04,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:57:04,798 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;@9215885, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:57:04,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-16 11:57:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:57:04,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:04,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:57:04,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:04,817 INFO L85 PathProgramCache]: Analyzing trace with hash 23390, now seen corresponding path program 1 times [2022-11-16 11:57:04,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:04,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154411747] [2022-11-16 11:57:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:04,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:57:04,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:04,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:04,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:04,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:57:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:05,040 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 11:57:05,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:05,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:05,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154411747] [2022-11-16 11:57:05,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154411747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:05,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:05,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:57:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728674331] [2022-11-16 11:57:05,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:05,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:05,098 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:05,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:05,562 INFO L93 Difference]: Finished difference Result 752 states and 2568 transitions. [2022-11-16 11:57:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:05,565 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 11:57:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:05,598 INFO L225 Difference]: With dead ends: 752 [2022-11-16 11:57:05,598 INFO L226 Difference]: Without dead ends: 752 [2022-11-16 11:57:05,599 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 11:57:05,605 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:05,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:57:05,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-16 11:57:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2022-11-16 11:57:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 749 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2568 transitions. [2022-11-16 11:57:05,726 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2568 transitions. Word has length 2 [2022-11-16 11:57:05,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:05,726 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2568 transitions. [2022-11-16 11:57:05,726 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 11:57:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2568 transitions. [2022-11-16 11:57:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:57:05,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:05,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:57:05,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:05,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:05,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 23234, now seen corresponding path program 1 times [2022-11-16 11:57:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:05,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649043752] [2022-11-16 11:57:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:05,930 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 11:57:05,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:05,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:05,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:05,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:57:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:06,120 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:57:06,121 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 11:57:06,149 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 11:57:06,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:06,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:06,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649043752] [2022-11-16 11:57:06,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649043752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:06,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:06,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:57:06,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448483313] [2022-11-16 11:57:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:06,153 INFO L87 Difference]: Start difference. First operand 750 states and 2568 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:06,370 INFO L93 Difference]: Finished difference Result 749 states and 2566 transitions. [2022-11-16 11:57:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:06,371 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 11:57:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:06,376 INFO L225 Difference]: With dead ends: 749 [2022-11-16 11:57:06,377 INFO L226 Difference]: Without dead ends: 749 [2022-11-16 11:57:06,377 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 11:57:06,378 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:06,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-16 11:57:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-16 11:57:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.158833063209076) internal successors, (2566), 748 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-11-16 11:57:06,408 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-11-16 11:57:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:06,408 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-11-16 11:57:06,408 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 11:57:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-11-16 11:57:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:57:06,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:06,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:57:06,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:06,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:06,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash 23235, now seen corresponding path program 1 times [2022-11-16 11:57:06,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:06,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487551095] [2022-11-16 11:57:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:06,622 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 11:57:06,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:06,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:06,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:57:06,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:06,880 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:06,881 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 11:57:06,914 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 11:57:06,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:06,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:06,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487551095] [2022-11-16 11:57:06,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487551095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:06,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:06,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:57:06,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332811921] [2022-11-16 11:57:06,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:06,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:06,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:06,917 INFO L87 Difference]: Start difference. First operand 749 states and 2566 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:07,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:07,188 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-16 11:57:07,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:07,188 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 11:57:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:07,194 INFO L225 Difference]: With dead ends: 749 [2022-11-16 11:57:07,194 INFO L226 Difference]: Without dead ends: 749 [2022-11-16 11:57:07,194 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 11:57:07,195 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:07,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:57:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-16 11:57:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-16 11:57:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-16 11:57:07,225 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-16 11:57:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:07,225 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-16 11:57:07,225 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 11:57:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-16 11:57:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:57:07,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:07,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:57:07,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:07,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash 724765, now seen corresponding path program 1 times [2022-11-16 11:57:07,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:07,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840493469] [2022-11-16 11:57:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:07,440 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 11:57:07,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:07,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:07,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:57:07,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:07,645 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-16 11:57:07,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-16 11:57:07,767 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 11:57:07,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:07,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840493469] [2022-11-16 11:57:07,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840493469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:07,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:07,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:57:07,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982400791] [2022-11-16 11:57:07,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:07,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:07,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:07,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:07,774 INFO L87 Difference]: Start difference. First operand 749 states and 2565 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:07,931 INFO L93 Difference]: Finished difference Result 748 states and 2564 transitions. [2022-11-16 11:57:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:57:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:07,937 INFO L225 Difference]: With dead ends: 748 [2022-11-16 11:57:07,937 INFO L226 Difference]: Without dead ends: 748 [2022-11-16 11:57:07,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:07,939 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:07,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-16 11:57:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-16 11:57:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-16 11:57:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 617 states have (on average 4.155591572123177) internal successors, (2564), 747 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 11:57:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2564 transitions. [2022-11-16 11:57:07,967 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2564 transitions. Word has length 3 [2022-11-16 11:57:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:07,968 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2564 transitions. [2022-11-16 11:57:07,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2564 transitions. [2022-11-16 11:57:07,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:57:07,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:07,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:57:07,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:08,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:08,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 724766, now seen corresponding path program 1 times [2022-11-16 11:57:08,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:08,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387472673] [2022-11-16 11:57:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:08,181 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 11:57:08,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:08,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:08,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:08,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:57:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:08,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:08,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:08,434 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-16 11:57:08,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-16 11:57:08,467 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:57:08,468 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 11:57:08,869 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 11:57:08,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:09,067 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 11:57:09,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:09,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387472673] [2022-11-16 11:57:09,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387472673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:09,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:09,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:57:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423287386] [2022-11-16 11:57:09,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:09,070 INFO L87 Difference]: Start difference. First operand 748 states and 2564 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 11:57:09,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:09,233 INFO L93 Difference]: Finished difference Result 750 states and 2570 transitions. [2022-11-16 11:57:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:57:09,233 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 11:57:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:09,241 INFO L225 Difference]: With dead ends: 750 [2022-11-16 11:57:09,241 INFO L226 Difference]: Without dead ends: 750 [2022-11-16 11:57:09,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:09,242 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:09,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-16 11:57:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-16 11:57:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-11-16 11:57:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 619 states have (on average 4.1518578352180935) internal successors, (2570), 749 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states 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 11:57:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2570 transitions. [2022-11-16 11:57:09,272 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2570 transitions. Word has length 3 [2022-11-16 11:57:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:09,272 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2570 transitions. [2022-11-16 11:57:09,272 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 11:57:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2570 transitions. [2022-11-16 11:57:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:57:09,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:09,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:57:09,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:09,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:09,485 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash 724610, now seen corresponding path program 1 times [2022-11-16 11:57:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:09,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759857182] [2022-11-16 11:57:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:09,486 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 11:57:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:09,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:09,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:09,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:57:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:09,727 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:09,727 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 11:57:09,816 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 11:57:09,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:10,053 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 11:57:10,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:10,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759857182] [2022-11-16 11:57:10,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759857182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:10,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:10,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:57:10,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796534894] [2022-11-16 11:57:10,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:10,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:10,055 INFO L87 Difference]: Start difference. First operand 750 states and 2570 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 11:57:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:10,893 INFO L93 Difference]: Finished difference Result 1494 states and 5129 transitions. [2022-11-16 11:57:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:10,895 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 11:57:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:10,907 INFO L225 Difference]: With dead ends: 1494 [2022-11-16 11:57:10,907 INFO L226 Difference]: Without dead ends: 1494 [2022-11-16 11:57:10,907 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 11:57:10,908 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 116 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:10,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 9 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-16 11:57:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 751. [2022-11-16 11:57:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 620 states have (on average 4.146774193548387) internal successors, (2571), 750 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states 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 11:57:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2571 transitions. [2022-11-16 11:57:10,961 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2571 transitions. Word has length 3 [2022-11-16 11:57:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:10,961 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2571 transitions. [2022-11-16 11:57:10,961 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 11:57:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2571 transitions. [2022-11-16 11:57:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:57:10,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:10,964 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-16 11:57:10,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:11,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:11,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:11,177 INFO L85 PathProgramCache]: Analyzing trace with hash 696488766, now seen corresponding path program 2 times [2022-11-16 11:57:11,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:11,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767244346] [2022-11-16 11:57:11,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:11,177 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 11:57:11,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:11,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:11,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:11,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:57:11,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:57:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:11,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:11,399 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-16 11:57:11,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-16 11:57:11,422 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:57:11,422 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 11:57:11,545 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 11:57:11,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:11,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767244346] [2022-11-16 11:57:11,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767244346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:11,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:11,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:57:11,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504700186] [2022-11-16 11:57:11,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:11,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:11,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:11,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:11,548 INFO L87 Difference]: Start difference. First operand 751 states and 2571 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:11,686 INFO L93 Difference]: Finished difference Result 750 states and 2569 transitions. [2022-11-16 11:57:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:11,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:57:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:11,707 INFO L225 Difference]: With dead ends: 750 [2022-11-16 11:57:11,707 INFO L226 Difference]: Without dead ends: 750 [2022-11-16 11:57:11,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:11,709 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:11,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-16 11:57:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-16 11:57:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-11-16 11:57:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 620 states have (on average 4.143548387096774) internal successors, (2569), 749 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states 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 11:57:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2569 transitions. [2022-11-16 11:57:11,739 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2569 transitions. Word has length 5 [2022-11-16 11:57:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:11,739 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2569 transitions. [2022-11-16 11:57:11,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2569 transitions. [2022-11-16 11:57:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:57:11,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:11,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:57:11,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:11,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:11,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:11,952 INFO L85 PathProgramCache]: Analyzing trace with hash 696517786, now seen corresponding path program 1 times [2022-11-16 11:57:11,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:11,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723742076] [2022-11-16 11:57:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:11,953 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 11:57:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:11,954 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:11,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:57:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:12,143 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-16 11:57:12,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-16 11:57:12,181 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 11:57:12,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:12,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:12,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723742076] [2022-11-16 11:57:12,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723742076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:12,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:12,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:57:12,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043376439] [2022-11-16 11:57:12,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:12,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:12,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:12,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:12,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:12,183 INFO L87 Difference]: Start difference. First operand 750 states and 2569 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:12,361 INFO L93 Difference]: Finished difference Result 720 states and 2484 transitions. [2022-11-16 11:57:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:12,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:57:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:12,367 INFO L225 Difference]: With dead ends: 720 [2022-11-16 11:57:12,367 INFO L226 Difference]: Without dead ends: 720 [2022-11-16 11:57:12,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:12,368 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:12,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-11-16 11:57:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2022-11-16 11:57:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 602 states have (on average 4.1262458471760795) internal successors, (2484), 719 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states 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 11:57:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2484 transitions. [2022-11-16 11:57:12,396 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2484 transitions. Word has length 5 [2022-11-16 11:57:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:12,397 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 2484 transitions. [2022-11-16 11:57:12,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2484 transitions. [2022-11-16 11:57:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:57:12,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:12,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:57:12,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:12,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:12,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:12,617 INFO L85 PathProgramCache]: Analyzing trace with hash 696517787, now seen corresponding path program 1 times [2022-11-16 11:57:12,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:12,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487498674] [2022-11-16 11:57:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:12,617 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 11:57:12,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:12,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:12,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:12,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:57:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:12,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,876 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 11:57:12,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 11:57:12,890 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 11:57:13,121 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 11:57:13,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:13,365 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 11:57:13,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:13,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487498674] [2022-11-16 11:57:13,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487498674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:13,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:13,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:57:13,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970357942] [2022-11-16 11:57:13,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:13,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:57:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:57:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:13,367 INFO L87 Difference]: Start difference. First operand 720 states and 2484 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:13,841 INFO L93 Difference]: Finished difference Result 726 states and 2500 transitions. [2022-11-16 11:57:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:13,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:57:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:13,848 INFO L225 Difference]: With dead ends: 726 [2022-11-16 11:57:13,848 INFO L226 Difference]: Without dead ends: 726 [2022-11-16 11:57:13,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:13,849 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:13,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 11:57:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-16 11:57:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 723. [2022-11-16 11:57:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 605 states have (on average 4.11900826446281) internal successors, (2492), 722 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states 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 11:57:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2492 transitions. [2022-11-16 11:57:13,874 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2492 transitions. Word has length 5 [2022-11-16 11:57:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:13,874 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 2492 transitions. [2022-11-16 11:57:13,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2492 transitions. [2022-11-16 11:57:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:57:13,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:13,875 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 11:57:13,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:14,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:14,087 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:14,087 INFO L85 PathProgramCache]: Analyzing trace with hash 116314755, now seen corresponding path program 2 times [2022-11-16 11:57:14,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:14,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9230451] [2022-11-16 11:57:14,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:14,088 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 11:57:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:14,090 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:14,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:57:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:57:14,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:14,345 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:14,345 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 11:57:14,525 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 11:57:14,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:15,205 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 11:57:15,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:15,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9230451] [2022-11-16 11:57:15,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9230451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:15,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:15,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:57:15,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178259084] [2022-11-16 11:57:15,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:15,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:57:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:57:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:57:15,207 INFO L87 Difference]: Start difference. First operand 723 states and 2492 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 11:57:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:20,461 INFO L93 Difference]: Finished difference Result 6430 states and 22286 transitions. [2022-11-16 11:57:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:57:20,462 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 11:57:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:20,509 INFO L225 Difference]: With dead ends: 6430 [2022-11-16 11:57:20,509 INFO L226 Difference]: Without dead ends: 6430 [2022-11-16 11:57:20,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:57:20,510 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1044 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:20,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 72 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-16 11:57:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6430 states. [2022-11-16 11:57:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6430 to 729. [2022-11-16 11:57:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 611 states have (on average 4.098199672667758) internal successors, (2504), 728 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states 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 11:57:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2504 transitions. [2022-11-16 11:57:20,619 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2504 transitions. Word has length 6 [2022-11-16 11:57:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:20,620 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 2504 transitions. [2022-11-16 11:57:20,620 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 11:57:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2504 transitions. [2022-11-16 11:57:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:57:20,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:20,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:57:20,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:20,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:20,833 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash 117209272, now seen corresponding path program 1 times [2022-11-16 11:57:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:20,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921783895] [2022-11-16 11:57:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:20,834 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 11:57:20,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:20,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:20,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:20,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:57:20,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:21,008 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:57:21,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:57:21,067 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 11:57:21,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:21,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921783895] [2022-11-16 11:57:21,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921783895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:21,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:21,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:21,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574841306] [2022-11-16 11:57:21,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:21,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:21,069 INFO L87 Difference]: Start difference. First operand 729 states and 2504 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 11:57:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:21,261 INFO L93 Difference]: Finished difference Result 415 states and 1385 transitions. [2022-11-16 11:57:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:21,262 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 11:57:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:21,265 INFO L225 Difference]: With dead ends: 415 [2022-11-16 11:57:21,265 INFO L226 Difference]: Without dead ends: 415 [2022-11-16 11:57:21,265 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 11:57:21,266 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:21,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-16 11:57:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2022-11-16 11:57:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 372 states have (on average 3.7231182795698925) internal successors, (1385), 414 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states 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 11:57:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1385 transitions. [2022-11-16 11:57:21,278 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1385 transitions. Word has length 6 [2022-11-16 11:57:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:21,279 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 1385 transitions. [2022-11-16 11:57:21,279 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 11:57:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1385 transitions. [2022-11-16 11:57:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:57:21,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:21,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:57:21,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:21,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:21,491 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash 117209273, now seen corresponding path program 1 times [2022-11-16 11:57:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:21,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043238313] [2022-11-16 11:57:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:21,493 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 11:57:21,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:21,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:21,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:57:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:21,705 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 11:57:21,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:21,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 11:57:22,060 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 11:57:22,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043238313] [2022-11-16 11:57:22,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043238313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:22,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:22,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:57:22,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622613779] [2022-11-16 11:57:22,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:22,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:22,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:22,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:22,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:22,062 INFO L87 Difference]: Start difference. First operand 415 states and 1385 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 11:57:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:23,209 INFO L93 Difference]: Finished difference Result 1276 states and 4266 transitions. [2022-11-16 11:57:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:57:23,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 11:57:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:23,216 INFO L225 Difference]: With dead ends: 1276 [2022-11-16 11:57:23,216 INFO L226 Difference]: Without dead ends: 1276 [2022-11-16 11:57:23,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:57:23,217 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 317 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:23,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 19 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:57:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-11-16 11:57:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 498. [2022-11-16 11:57:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 455 states have (on average 3.8703296703296703) internal successors, (1761), 497 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states 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 11:57:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1761 transitions. [2022-11-16 11:57:23,257 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1761 transitions. Word has length 6 [2022-11-16 11:57:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:23,257 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 1761 transitions. [2022-11-16 11:57:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 11:57:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1761 transitions. [2022-11-16 11:57:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:23,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:23,258 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-16 11:57:23,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:23,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:23,470 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash -689176389, now seen corresponding path program 2 times [2022-11-16 11:57:23,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:23,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974771003] [2022-11-16 11:57:23,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:23,471 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 11:57:23,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:23,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:23,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:23,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:57:23,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:23,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:57:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:23,696 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 11:57:23,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 11:57:23,718 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 11:57:23,966 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 11:57:23,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:23,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:23,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974771003] [2022-11-16 11:57:23,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974771003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:23,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:23,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:23,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123562335] [2022-11-16 11:57:23,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:23,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:23,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:23,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:23,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:23,968 INFO L87 Difference]: Start difference. First operand 498 states and 1761 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 11:57:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:24,071 INFO L93 Difference]: Finished difference Result 496 states and 1756 transitions. [2022-11-16 11:57:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:24,072 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 7 [2022-11-16 11:57:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:24,075 INFO L225 Difference]: With dead ends: 496 [2022-11-16 11:57:24,075 INFO L226 Difference]: Without dead ends: 496 [2022-11-16 11:57:24,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 11:57:24,076 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:24,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-11-16 11:57:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-11-16 11:57:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 493. [2022-11-16 11:57:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 450 states have (on average 3.888888888888889) internal successors, (1750), 492 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states 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 11:57:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1750 transitions. [2022-11-16 11:57:24,091 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1750 transitions. Word has length 7 [2022-11-16 11:57:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:24,092 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 1750 transitions. [2022-11-16 11:57:24,092 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 11:57:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1750 transitions. [2022-11-16 11:57:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:24,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:24,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:24,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:24,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:24,304 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -661477300, now seen corresponding path program 1 times [2022-11-16 11:57:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:24,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742153670] [2022-11-16 11:57:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:24,305 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 11:57:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:24,306 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:24,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:24,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:57:24,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:24,510 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 11:57:24,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:24,623 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 11:57:24,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:24,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742153670] [2022-11-16 11:57:24,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742153670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:24,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:24,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 11:57:24,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126551917] [2022-11-16 11:57:24,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:24,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:24,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:24,624 INFO L87 Difference]: Start difference. First operand 493 states and 1750 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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 11:57:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:25,441 INFO L93 Difference]: Finished difference Result 973 states and 3313 transitions. [2022-11-16 11:57:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:57:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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 7 [2022-11-16 11:57:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:25,467 INFO L225 Difference]: With dead ends: 973 [2022-11-16 11:57:25,467 INFO L226 Difference]: Without dead ends: 973 [2022-11-16 11:57:25,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:57:25,469 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 242 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:25,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 26 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-11-16 11:57:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 493. [2022-11-16 11:57:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 450 states have (on average 3.7066666666666666) internal successors, (1668), 492 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states 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 11:57:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1668 transitions. [2022-11-16 11:57:25,489 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1668 transitions. Word has length 7 [2022-11-16 11:57:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:25,489 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 1668 transitions. [2022-11-16 11:57:25,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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 11:57:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1668 transitions. [2022-11-16 11:57:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:25,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:25,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:25,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:25,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:25,702 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:25,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash -661476587, now seen corresponding path program 1 times [2022-11-16 11:57:25,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:25,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918147667] [2022-11-16 11:57:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:25,703 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 11:57:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:25,704 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:25,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:57:25,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:25,972 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 11:57:25,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 11:57:25,987 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 11:57:26,261 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 11:57:26,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:26,536 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 11:57:26,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:26,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918147667] [2022-11-16 11:57:26,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918147667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:26,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:26,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:57:26,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076170823] [2022-11-16 11:57:26,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:26,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:57:26,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:57:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:26,543 INFO L87 Difference]: Start difference. First operand 493 states and 1668 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:26,877 INFO L93 Difference]: Finished difference Result 501 states and 1686 transitions. [2022-11-16 11:57:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:57:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:26,880 INFO L225 Difference]: With dead ends: 501 [2022-11-16 11:57:26,881 INFO L226 Difference]: Without dead ends: 501 [2022-11-16 11:57:26,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:26,882 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:26,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-11-16 11:57:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-16 11:57:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 497. [2022-11-16 11:57:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 454 states have (on average 3.693832599118943) internal successors, (1677), 496 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states 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 11:57:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1677 transitions. [2022-11-16 11:57:26,897 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1677 transitions. Word has length 7 [2022-11-16 11:57:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:26,897 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1677 transitions. [2022-11-16 11:57:26,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1677 transitions. [2022-11-16 11:57:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:26,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:26,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:26,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:57:27,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:27,110 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:27,111 INFO L85 PathProgramCache]: Analyzing trace with hash -661476673, now seen corresponding path program 1 times [2022-11-16 11:57:27,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:27,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280623061] [2022-11-16 11:57:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:27,112 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 11:57:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:27,113 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:27,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:57:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:27,364 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:27,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:57:27,565 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 11:57:27,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:28,063 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 11:57:28,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:28,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280623061] [2022-11-16 11:57:28,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280623061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:28,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:28,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:57:28,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186159133] [2022-11-16 11:57:28,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:28,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:28,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:28,065 INFO L87 Difference]: Start difference. First operand 497 states and 1677 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:29,688 INFO L93 Difference]: Finished difference Result 898 states and 3206 transitions. [2022-11-16 11:57:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:57:29,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:57:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:29,691 INFO L225 Difference]: With dead ends: 898 [2022-11-16 11:57:29,692 INFO L226 Difference]: Without dead ends: 898 [2022-11-16 11:57:29,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:57:29,692 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 257 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:29,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:57:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-16 11:57:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 749. [2022-11-16 11:57:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 706 states have (on average 3.990084985835694) internal successors, (2817), 748 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states 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 11:57:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2817 transitions. [2022-11-16 11:57:29,713 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2817 transitions. Word has length 7 [2022-11-16 11:57:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:29,714 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2817 transitions. [2022-11-16 11:57:29,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2817 transitions. [2022-11-16 11:57:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:29,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:29,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:29,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:29,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:29,926 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash -661290164, now seen corresponding path program 1 times [2022-11-16 11:57:29,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81016482] [2022-11-16 11:57:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:29,928 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 11:57:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:29,929 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:29,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:30,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:57:30,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:30,203 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:30,203 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 11:57:30,432 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 11:57:30,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:30,689 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 11:57:30,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:30,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81016482] [2022-11-16 11:57:30,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81016482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:30,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:30,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:57:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93766216] [2022-11-16 11:57:30,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:30,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:57:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:57:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:30,691 INFO L87 Difference]: Start difference. First operand 749 states and 2817 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:31,192 INFO L93 Difference]: Finished difference Result 1510 states and 5695 transitions. [2022-11-16 11:57:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:31,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:57:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:31,200 INFO L225 Difference]: With dead ends: 1510 [2022-11-16 11:57:31,200 INFO L226 Difference]: Without dead ends: 1510 [2022-11-16 11:57:31,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:31,201 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 201 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:31,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 16 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-11-16 11:57:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2022-11-16 11:57:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 787. [2022-11-16 11:57:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 746 states have (on average 3.9839142091152815) internal successors, (2972), 786 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states 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 11:57:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2972 transitions. [2022-11-16 11:57:31,233 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2972 transitions. Word has length 7 [2022-11-16 11:57:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:31,233 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 2972 transitions. [2022-11-16 11:57:31,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2972 transitions. [2022-11-16 11:57:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:31,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:31,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:31,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:57:31,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:31,446 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash -661290162, now seen corresponding path program 1 times [2022-11-16 11:57:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:31,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729528656] [2022-11-16 11:57:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:31,447 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 11:57:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:31,448 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:31,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:57:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:31,652 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:57:31,652 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 29 [2022-11-16 11:57:31,697 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 11:57:31,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:31,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:31,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729528656] [2022-11-16 11:57:31,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729528656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:31,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:31,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:57:31,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206053700] [2022-11-16 11:57:31,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:31,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:31,704 INFO L87 Difference]: Start difference. First operand 787 states and 2972 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:31,869 INFO L93 Difference]: Finished difference Result 751 states and 2824 transitions. [2022-11-16 11:57:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:57:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:31,873 INFO L225 Difference]: With dead ends: 751 [2022-11-16 11:57:31,873 INFO L226 Difference]: Without dead ends: 751 [2022-11-16 11:57:31,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:31,874 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:31,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-16 11:57:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-11-16 11:57:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 716 states have (on average 3.9441340782122905) internal successors, (2824), 750 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states 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 11:57:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2824 transitions. [2022-11-16 11:57:31,896 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2824 transitions. Word has length 7 [2022-11-16 11:57:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:31,897 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2824 transitions. [2022-11-16 11:57:31,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2824 transitions. [2022-11-16 11:57:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:57:31,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:31,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:31,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:57:32,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:32,110 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 969062150, now seen corresponding path program 1 times [2022-11-16 11:57:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:32,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574241964] [2022-11-16 11:57:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:32,111 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 11:57:32,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:32,112 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:32,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:57:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:32,374 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 11:57:32,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 11:57:32,390 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 11:57:32,706 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 11:57:32,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:32,993 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 11:57:32,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:32,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574241964] [2022-11-16 11:57:32,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574241964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:32,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:32,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:57:32,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447125673] [2022-11-16 11:57:32,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:32,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:57:32,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:57:32,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:32,995 INFO L87 Difference]: Start difference. First operand 751 states and 2824 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 11:57:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:33,406 INFO L93 Difference]: Finished difference Result 759 states and 2842 transitions. [2022-11-16 11:57:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 8 [2022-11-16 11:57:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:33,410 INFO L225 Difference]: With dead ends: 759 [2022-11-16 11:57:33,410 INFO L226 Difference]: Without dead ends: 759 [2022-11-16 11:57:33,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:33,411 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:33,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 22 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-11-16 11:57:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-11-16 11:57:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 751. [2022-11-16 11:57:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 716 states have (on average 3.9427374301675977) internal successors, (2823), 750 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states 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 11:57:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2823 transitions. [2022-11-16 11:57:33,433 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2823 transitions. Word has length 8 [2022-11-16 11:57:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:33,434 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2823 transitions. [2022-11-16 11:57:33,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 11:57:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2823 transitions. [2022-11-16 11:57:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:57:33,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:33,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:33,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:33,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:33,647 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash 974836540, now seen corresponding path program 1 times [2022-11-16 11:57:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:33,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288973041] [2022-11-16 11:57:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:33,649 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 11:57:33,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:33,650 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:33,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:33,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:57:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:33,877 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 11:57:33,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:34,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 11:57:34,189 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 11:57:34,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288973041] [2022-11-16 11:57:34,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288973041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:34,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:34,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:57:34,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346747210] [2022-11-16 11:57:34,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:34,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:34,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:34,192 INFO L87 Difference]: Start difference. First operand 751 states and 2823 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 11:57:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:35,166 INFO L93 Difference]: Finished difference Result 2079 states and 7969 transitions. [2022-11-16 11:57:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:57:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 8 [2022-11-16 11:57:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:35,176 INFO L225 Difference]: With dead ends: 2079 [2022-11-16 11:57:35,176 INFO L226 Difference]: Without dead ends: 2079 [2022-11-16 11:57:35,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:57:35,177 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 390 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:35,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 17 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-11-16 11:57:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 923. [2022-11-16 11:57:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 888 states have (on average 4.129504504504505) internal successors, (3667), 922 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states 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 11:57:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3667 transitions. [2022-11-16 11:57:35,238 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3667 transitions. Word has length 8 [2022-11-16 11:57:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:35,238 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 3667 transitions. [2022-11-16 11:57:35,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 11:57:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3667 transitions. [2022-11-16 11:57:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:57:35,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:35,239 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:35,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:35,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:35,451 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash -873717963, now seen corresponding path program 2 times [2022-11-16 11:57:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:35,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020746902] [2022-11-16 11:57:35,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:35,452 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 11:57:35,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:35,453 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:35,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:35,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:57:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:57:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:35,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:35,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:35,701 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 11:57:35,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 11:57:35,717 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 11:57:35,945 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 11:57:35,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:35,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020746902] [2022-11-16 11:57:35,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020746902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:35,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:35,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:35,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519038082] [2022-11-16 11:57:35,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:35,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:35,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:35,961 INFO L87 Difference]: Start difference. First operand 923 states and 3667 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 11:57:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:36,161 INFO L93 Difference]: Finished difference Result 919 states and 3654 transitions. [2022-11-16 11:57:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:57:36,161 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 9 [2022-11-16 11:57:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:36,164 INFO L225 Difference]: With dead ends: 919 [2022-11-16 11:57:36,164 INFO L226 Difference]: Without dead ends: 919 [2022-11-16 11:57:36,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 11:57:36,165 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:36,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-11-16 11:57:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-16 11:57:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2022-11-16 11:57:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 884 states have (on average 4.133484162895928) internal successors, (3654), 918 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states 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 11:57:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 3654 transitions. [2022-11-16 11:57:36,189 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 3654 transitions. Word has length 9 [2022-11-16 11:57:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:36,189 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 3654 transitions. [2022-11-16 11:57:36,190 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 11:57:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 3654 transitions. [2022-11-16 11:57:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:57:36,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:36,191 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:36,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:36,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:36,402 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:36,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash -873531540, now seen corresponding path program 2 times [2022-11-16 11:57:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:36,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306582067] [2022-11-16 11:57:36,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:36,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:57:36,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:36,404 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:36,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:36,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:57:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:57:36,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:36,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:36,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:36,615 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:57:36,615 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 11:57:36,627 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 11:57:36,674 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 11:57:36,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:36,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:36,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306582067] [2022-11-16 11:57:36,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306582067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:36,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:36,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:57:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105176553] [2022-11-16 11:57:36,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:36,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:36,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:36,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:36,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:36,676 INFO L87 Difference]: Start difference. First operand 919 states and 3654 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:36,827 INFO L93 Difference]: Finished difference Result 879 states and 3511 transitions. [2022-11-16 11:57:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:57:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:36,831 INFO L225 Difference]: With dead ends: 879 [2022-11-16 11:57:36,831 INFO L226 Difference]: Without dead ends: 879 [2022-11-16 11:57:36,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 11:57:36,832 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:36,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-16 11:57:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 830. [2022-11-16 11:57:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 799 states have (on average 4.188986232790989) internal successors, (3347), 829 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states 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 11:57:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 3347 transitions. [2022-11-16 11:57:36,883 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 3347 transitions. Word has length 9 [2022-11-16 11:57:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:36,884 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 3347 transitions. [2022-11-16 11:57:36,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 3347 transitions. [2022-11-16 11:57:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:57:36,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:36,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:36,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:37,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:37,100 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash 155164407, now seen corresponding path program 1 times [2022-11-16 11:57:37,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:37,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275778117] [2022-11-16 11:57:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:37,101 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 11:57:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:37,102 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:37,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:57:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:37,363 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:37,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:57:37,592 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 11:57:37,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:38,064 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 11:57:38,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275778117] [2022-11-16 11:57:38,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275778117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:38,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:38,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:57:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833004668] [2022-11-16 11:57:38,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:38,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:38,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:38,067 INFO L87 Difference]: Start difference. First operand 830 states and 3347 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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 11:57:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:38,627 INFO L93 Difference]: Finished difference Result 832 states and 3355 transitions. [2022-11-16 11:57:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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 9 [2022-11-16 11:57:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:38,631 INFO L225 Difference]: With dead ends: 832 [2022-11-16 11:57:38,631 INFO L226 Difference]: Without dead ends: 832 [2022-11-16 11:57:38,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:57:38,632 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:38,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-11-16 11:57:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-16 11:57:38,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2022-11-16 11:57:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 801 states have (on average 4.188514357053683) internal successors, (3355), 831 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states 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 11:57:38,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 3355 transitions. [2022-11-16 11:57:38,657 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 3355 transitions. Word has length 9 [2022-11-16 11:57:38,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:38,657 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 3355 transitions. [2022-11-16 11:57:38,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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 11:57:38,657 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 3355 transitions. [2022-11-16 11:57:38,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:57:38,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:38,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:38,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:57:38,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:38,870 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash 155329894, now seen corresponding path program 1 times [2022-11-16 11:57:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:38,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238737158] [2022-11-16 11:57:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:38,870 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 11:57:38,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:38,871 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:38,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:57:38,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:39,002 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 11:57:39,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:39,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238737158] [2022-11-16 11:57:39,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238737158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:39,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:39,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909409094] [2022-11-16 11:57:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:39,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:39,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:39,005 INFO L87 Difference]: Start difference. First operand 832 states and 3355 transitions. Second operand has 3 states, 2 states have (on average 4.5) 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 11:57:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:39,157 INFO L93 Difference]: Finished difference Result 672 states and 2623 transitions. [2022-11-16 11:57:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:39,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) 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 11:57:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:39,170 INFO L225 Difference]: With dead ends: 672 [2022-11-16 11:57:39,170 INFO L226 Difference]: Without dead ends: 672 [2022-11-16 11:57:39,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 11:57:39,171 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:39,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-16 11:57:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2022-11-16 11:57:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 649 states have (on average 4.0416024653312785) internal successors, (2623), 671 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states 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 11:57:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2623 transitions. [2022-11-16 11:57:39,191 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2623 transitions. Word has length 9 [2022-11-16 11:57:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:39,192 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 2623 transitions. [2022-11-16 11:57:39,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) 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 11:57:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2623 transitions. [2022-11-16 11:57:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:57:39,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:39,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:39,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:39,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:39,404 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash 155329895, now seen corresponding path program 1 times [2022-11-16 11:57:39,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:39,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237734828] [2022-11-16 11:57:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:39,406 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 11:57:39,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:39,407 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:39,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:57:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:39,583 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 11:57:39,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:39,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:39,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237734828] [2022-11-16 11:57:39,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237734828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:39,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:39,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:39,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262725196] [2022-11-16 11:57:39,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:39,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:39,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:39,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:39,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:39,585 INFO L87 Difference]: Start difference. First operand 672 states and 2623 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 11:57:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:39,730 INFO L93 Difference]: Finished difference Result 512 states and 1891 transitions. [2022-11-16 11:57:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:39,730 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 11:57:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:39,731 INFO L225 Difference]: With dead ends: 512 [2022-11-16 11:57:39,731 INFO L226 Difference]: Without dead ends: 512 [2022-11-16 11:57:39,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 11:57:39,732 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:39,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-16 11:57:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-16 11:57:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 497 states have (on average 3.8048289738430583) internal successors, (1891), 511 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states 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 11:57:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1891 transitions. [2022-11-16 11:57:39,746 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1891 transitions. Word has length 9 [2022-11-16 11:57:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:39,746 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 1891 transitions. [2022-11-16 11:57:39,747 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 11:57:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1891 transitions. [2022-11-16 11:57:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:57:39,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:39,748 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:39,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:39,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:39,959 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1315453210, now seen corresponding path program 2 times [2022-11-16 11:57:39,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:39,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562108992] [2022-11-16 11:57:39,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:39,961 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 11:57:39,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:39,962 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:39,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:40,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:57:40,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:57:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:40,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:40,190 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 11:57:40,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 11:57:40,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 11:57:40,445 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 11:57:40,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:40,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:40,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562108992] [2022-11-16 11:57:40,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562108992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:40,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:40,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994178738] [2022-11-16 11:57:40,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:40,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:40,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:40,449 INFO L87 Difference]: Start difference. First operand 512 states and 1891 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 11:57:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:40,545 INFO L93 Difference]: Finished difference Result 511 states and 1890 transitions. [2022-11-16 11:57:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:40,545 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 10 [2022-11-16 11:57:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:40,547 INFO L225 Difference]: With dead ends: 511 [2022-11-16 11:57:40,547 INFO L226 Difference]: Without dead ends: 511 [2022-11-16 11:57:40,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 11:57:40,548 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:40,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 11:57:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-16 11:57:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 503. [2022-11-16 11:57:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 489 states have (on average 3.826175869120654) internal successors, (1871), 502 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states 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 11:57:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1871 transitions. [2022-11-16 11:57:40,565 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1871 transitions. Word has length 10 [2022-11-16 11:57:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:40,565 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 1871 transitions. [2022-11-16 11:57:40,565 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 11:57:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1871 transitions. [2022-11-16 11:57:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:57:40,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:40,566 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:40,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:40,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:40,777 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash -738473415, now seen corresponding path program 2 times [2022-11-16 11:57:40,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:40,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339046828] [2022-11-16 11:57:40,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:40,778 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 11:57:40,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:40,779 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:40,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:40,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:57:40,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:40,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:57:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:41,055 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:41,055 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 11:57:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:41,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:42,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:42,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339046828] [2022-11-16 11:57:42,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339046828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:42,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:42,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:57:42,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527845591] [2022-11-16 11:57:42,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:42,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:57:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:42,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:57:42,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:57:42,696 INFO L87 Difference]: Start difference. First operand 503 states and 1871 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:57:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:54,813 INFO L93 Difference]: Finished difference Result 1692 states and 5884 transitions. [2022-11-16 11:57:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:57:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 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 11:57:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:54,819 INFO L225 Difference]: With dead ends: 1692 [2022-11-16 11:57:54,820 INFO L226 Difference]: Without dead ends: 1692 [2022-11-16 11:57:54,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:57:54,820 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 467 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:54,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 141 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-16 11:57:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-11-16 11:57:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 821. [2022-11-16 11:57:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 807 states have (on average 3.7732342007434942) internal successors, (3045), 820 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states 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 11:57:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 3045 transitions. [2022-11-16 11:57:54,853 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 3045 transitions. Word has length 10 [2022-11-16 11:57:54,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:54,853 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 3045 transitions. [2022-11-16 11:57:54,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:57:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 3045 transitions. [2022-11-16 11:57:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:57:54,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:54,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:54,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:55,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:55,055 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash 515126294, now seen corresponding path program 1 times [2022-11-16 11:57:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:55,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135294172] [2022-11-16 11:57:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:55,056 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 11:57:55,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:55,057 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:55,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:55,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:57:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:55,329 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:55,329 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 11:57:55,606 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 11:57:55,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:56,081 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 11:57:56,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:56,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135294172] [2022-11-16 11:57:56,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135294172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:56,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:56,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:57:56,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109082405] [2022-11-16 11:57:56,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:56,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:56,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:56,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:56,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:56,084 INFO L87 Difference]: Start difference. First operand 821 states and 3045 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:57:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:56,583 INFO L93 Difference]: Finished difference Result 881 states and 3309 transitions. [2022-11-16 11:57:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:56,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 11:57:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:56,586 INFO L225 Difference]: With dead ends: 881 [2022-11-16 11:57:56,587 INFO L226 Difference]: Without dead ends: 881 [2022-11-16 11:57:56,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:57:56,587 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:56,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-11-16 11:57:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-16 11:57:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 881. [2022-11-16 11:57:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 867 states have (on average 3.8166089965397925) internal successors, (3309), 880 states have internal predecessors, (3309), 0 states have call successors, (0), 0 states 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 11:57:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3309 transitions. [2022-11-16 11:57:56,610 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3309 transitions. Word has length 10 [2022-11-16 11:57:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:56,611 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 3309 transitions. [2022-11-16 11:57:56,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:57:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3309 transitions. [2022-11-16 11:57:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:57:56,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:56,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:56,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:56,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:56,824 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash 515131874, now seen corresponding path program 2 times [2022-11-16 11:57:56,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:56,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248774801] [2022-11-16 11:57:56,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:56,825 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 11:57:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:56,826 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:56,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:56,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:57:56,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:57:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:57,099 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:57,100 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 11:57:57,350 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 11:57:57,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:57,884 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 11:57:57,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:57,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248774801] [2022-11-16 11:57:57,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248774801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:57,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:57,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:57:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777077653] [2022-11-16 11:57:57,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:57,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:57,885 INFO L87 Difference]: Start difference. First operand 881 states and 3309 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:57:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:58,542 INFO L93 Difference]: Finished difference Result 1043 states and 4029 transitions. [2022-11-16 11:57:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:57:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 11:57:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:58,546 INFO L225 Difference]: With dead ends: 1043 [2022-11-16 11:57:58,546 INFO L226 Difference]: Without dead ends: 1043 [2022-11-16 11:57:58,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:57:58,547 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:58,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 67 Unchecked, 0.6s Time] [2022-11-16 11:57:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-11-16 11:57:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 941. [2022-11-16 11:57:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 927 states have (on average 3.854368932038835) internal successors, (3573), 940 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states 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 11:57:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3573 transitions. [2022-11-16 11:57:58,599 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3573 transitions. Word has length 10 [2022-11-16 11:57:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:58,599 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 3573 transitions. [2022-11-16 11:57:58,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:57:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3573 transitions. [2022-11-16 11:57:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:57:58,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:58,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:58,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:58,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:58,813 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:57:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash 520229204, now seen corresponding path program 3 times [2022-11-16 11:57:58,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:57:58,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725526478] [2022-11-16 11:57:58,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:57:58,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:57:58,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:57:58,814 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:58,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:57:58,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:57:58,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:57:58,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:59,102 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:57:59,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:57:59,352 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 11:57:59,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:59,908 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 11:57:59,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:57:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725526478] [2022-11-16 11:57:59,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725526478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:59,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:59,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:57:59,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084556807] [2022-11-16 11:57:59,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:59,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:59,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:57:59,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:59,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:59,910 INFO L87 Difference]: Start difference. First operand 941 states and 3573 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:58:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:00,442 INFO L93 Difference]: Finished difference Result 953 states and 3621 transitions. [2022-11-16 11:58:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:58:00,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 11:58:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:00,446 INFO L225 Difference]: With dead ends: 953 [2022-11-16 11:58:00,446 INFO L226 Difference]: Without dead ends: 953 [2022-11-16 11:58:00,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:58:00,447 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:00,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-11-16 11:58:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-11-16 11:58:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 953. [2022-11-16 11:58:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 939 states have (on average 3.856230031948882) internal successors, (3621), 952 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states 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 11:58:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3621 transitions. [2022-11-16 11:58:00,472 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3621 transitions. Word has length 10 [2022-11-16 11:58:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:00,473 INFO L495 AbstractCegarLoop]: Abstraction has 953 states and 3621 transitions. [2022-11-16 11:58:00,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:58:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3621 transitions. [2022-11-16 11:58:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:58:00,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:00,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:00,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:00,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:00,686 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash 520255631, now seen corresponding path program 1 times [2022-11-16 11:58:00,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:00,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033422076] [2022-11-16 11:58:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:00,687 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 11:58:00,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:00,688 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:00,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:58:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:00,979 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:00,979 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 11:58:01,242 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 11:58:01,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:01,992 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 11:58:01,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:01,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033422076] [2022-11-16 11:58:01,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033422076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:01,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:01,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808696312] [2022-11-16 11:58:01,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:01,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:01,994 INFO L87 Difference]: Start difference. First operand 953 states and 3621 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:58:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:02,974 INFO L93 Difference]: Finished difference Result 980 states and 3728 transitions. [2022-11-16 11:58:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:58:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 11:58:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:02,977 INFO L225 Difference]: With dead ends: 980 [2022-11-16 11:58:02,977 INFO L226 Difference]: Without dead ends: 980 [2022-11-16 11:58:02,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:58:02,981 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:02,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-11-16 11:58:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-11-16 11:58:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 980. [2022-11-16 11:58:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 966 states have (on average 3.8592132505175982) internal successors, (3728), 979 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states 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 11:58:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 3728 transitions. [2022-11-16 11:58:03,001 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 3728 transitions. Word has length 10 [2022-11-16 11:58:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:03,001 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 3728 transitions. [2022-11-16 11:58:03,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 11:58:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 3728 transitions. [2022-11-16 11:58:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:03,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:03,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:03,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:03,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:03,216 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:03,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1421707151, now seen corresponding path program 1 times [2022-11-16 11:58:03,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:03,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030170370] [2022-11-16 11:58:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:03,217 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 11:58:03,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:03,219 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:03,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:58:03,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:03,515 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:03,516 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 11:58:03,838 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 11:58:03,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:04,408 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 11:58:04,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:04,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030170370] [2022-11-16 11:58:04,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030170370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:04,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:04,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:04,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264663861] [2022-11-16 11:58:04,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:04,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:04,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:04,410 INFO L87 Difference]: Start difference. First operand 980 states and 3728 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 11:58:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:04,971 INFO L93 Difference]: Finished difference Result 1004 states and 3842 transitions. [2022-11-16 11:58:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:58:04,973 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 11:58:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:04,975 INFO L225 Difference]: With dead ends: 1004 [2022-11-16 11:58:04,975 INFO L226 Difference]: Without dead ends: 1004 [2022-11-16 11:58:04,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:58:04,976 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:04,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-16 11:58:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-11-16 11:58:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 992. [2022-11-16 11:58:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 978 states have (on average 3.8732106339468304) internal successors, (3788), 991 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states 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 11:58:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3788 transitions. [2022-11-16 11:58:05,001 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3788 transitions. Word has length 11 [2022-11-16 11:58:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:05,001 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 3788 transitions. [2022-11-16 11:58:05,002 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 11:58:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3788 transitions. [2022-11-16 11:58:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:05,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:05,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:05,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:05,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:05,204 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:05,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1537835321, now seen corresponding path program 2 times [2022-11-16 11:58:05,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:05,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628628373] [2022-11-16 11:58:05,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:58:05,205 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 11:58:05,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:05,206 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:05,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:05,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:58:05,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:05,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:58:05,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:05,505 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:05,505 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 11:58:05,770 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 11:58:05,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:06,358 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 11:58:06,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:06,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628628373] [2022-11-16 11:58:06,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628628373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:06,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:06,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406642922] [2022-11-16 11:58:06,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:06,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:06,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:06,360 INFO L87 Difference]: Start difference. First operand 992 states and 3788 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 11:58:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:07,001 INFO L93 Difference]: Finished difference Result 1014 states and 3887 transitions. [2022-11-16 11:58:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:58:07,002 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 11:58:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:07,005 INFO L225 Difference]: With dead ends: 1014 [2022-11-16 11:58:07,005 INFO L226 Difference]: Without dead ends: 1014 [2022-11-16 11:58:07,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:58:07,006 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:07,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 36 Unchecked, 0.6s Time] [2022-11-16 11:58:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-11-16 11:58:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1008. [2022-11-16 11:58:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 994 states have (on average 3.8832997987927564) internal successors, (3860), 1007 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states 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 11:58:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 3860 transitions. [2022-11-16 11:58:07,024 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 3860 transitions. Word has length 11 [2022-11-16 11:58:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:07,024 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 3860 transitions. [2022-11-16 11:58:07,024 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 11:58:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 3860 transitions. [2022-11-16 11:58:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:07,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:07,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:07,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:58:07,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:07,237 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:07,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1537834391, now seen corresponding path program 3 times [2022-11-16 11:58:07,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:07,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931654219] [2022-11-16 11:58:07,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:58:07,238 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 11:58:07,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:07,239 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:07,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:07,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:58:07,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:07,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:58:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:07,559 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:07,560 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 11:58:07,864 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 11:58:07,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:08,439 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 11:58:08,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:08,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931654219] [2022-11-16 11:58:08,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931654219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:08,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:08,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:08,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638055319] [2022-11-16 11:58:08,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:08,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:08,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:08,441 INFO L87 Difference]: Start difference. First operand 1008 states and 3860 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 11:58:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:08,661 INFO L93 Difference]: Finished difference Result 1034 states and 3996 transitions. [2022-11-16 11:58:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:58:08,661 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 11:58:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:08,664 INFO L225 Difference]: With dead ends: 1034 [2022-11-16 11:58:08,664 INFO L226 Difference]: Without dead ends: 1034 [2022-11-16 11:58:08,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:58:08,665 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:08,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-16 11:58:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-16 11:58:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1022. [2022-11-16 11:58:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1008 states have (on average 3.9047619047619047) internal successors, (3936), 1021 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states 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 11:58:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3936 transitions. [2022-11-16 11:58:08,687 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3936 transitions. Word has length 11 [2022-11-16 11:58:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:08,687 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 3936 transitions. [2022-11-16 11:58:08,687 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 11:58:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3936 transitions. [2022-11-16 11:58:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:08,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:08,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:08,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:08,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:08,897 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:08,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1211095481, now seen corresponding path program 1 times [2022-11-16 11:58:08,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:08,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866337794] [2022-11-16 11:58:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:08,898 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 11:58:08,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:08,899 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:08,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:09,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:58:09,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:09,180 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:09,180 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 11:58:09,454 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 11:58:09,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:09,984 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 11:58:09,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:09,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866337794] [2022-11-16 11:58:09,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866337794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:09,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:09,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:09,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054274441] [2022-11-16 11:58:09,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:09,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:09,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:09,986 INFO L87 Difference]: Start difference. First operand 1022 states and 3936 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 11:58:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:10,507 INFO L93 Difference]: Finished difference Result 1048 states and 4072 transitions. [2022-11-16 11:58:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:58:10,508 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 11:58:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:10,511 INFO L225 Difference]: With dead ends: 1048 [2022-11-16 11:58:10,511 INFO L226 Difference]: Without dead ends: 1048 [2022-11-16 11:58:10,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:58:10,512 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:10,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-11-16 11:58:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-11-16 11:58:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1042. [2022-11-16 11:58:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1028 states have (on average 3.937743190661479) internal successors, (4048), 1041 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states 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 11:58:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 4048 transitions. [2022-11-16 11:58:10,538 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 4048 transitions. Word has length 11 [2022-11-16 11:58:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:10,538 INFO L495 AbstractCegarLoop]: Abstraction has 1042 states and 4048 transitions. [2022-11-16 11:58:10,538 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 11:58:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 4048 transitions. [2022-11-16 11:58:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:10,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:10,540 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:10,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:10,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:10,752 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1210951331, now seen corresponding path program 4 times [2022-11-16 11:58:10,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:10,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639717528] [2022-11-16 11:58:10,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:58:10,753 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 11:58:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:10,753 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:10,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:10,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:58:10,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:10,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:58:10,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:11,049 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:11,050 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 11:58:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:58:11,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:12,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:12,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639717528] [2022-11-16 11:58:12,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639717528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:12,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:12,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-16 11:58:12,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848050137] [2022-11-16 11:58:12,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:12,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:58:12,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:12,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:58:12,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:58:12,145 INFO L87 Difference]: Start difference. First operand 1042 states and 4048 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 11:58:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:12,975 INFO L93 Difference]: Finished difference Result 1008 states and 3878 transitions. [2022-11-16 11:58:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:58:12,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 11:58:12,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:12,978 INFO L225 Difference]: With dead ends: 1008 [2022-11-16 11:58:12,978 INFO L226 Difference]: Without dead ends: 1008 [2022-11-16 11:58:12,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:58:12,979 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:12,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 79 Unchecked, 0.8s Time] [2022-11-16 11:58:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-11-16 11:58:12,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1008. [2022-11-16 11:58:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 994 states have (on average 3.9014084507042255) internal successors, (3878), 1007 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states 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 11:58:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 3878 transitions. [2022-11-16 11:58:12,996 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 3878 transitions. Word has length 11 [2022-11-16 11:58:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:12,996 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 3878 transitions. [2022-11-16 11:58:12,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 11:58:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 3878 transitions. [2022-11-16 11:58:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:12,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:12,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:13,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:58:13,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:13,198 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1052905271, now seen corresponding path program 2 times [2022-11-16 11:58:13,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:13,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048566226] [2022-11-16 11:58:13,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:58:13,199 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 11:58:13,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:13,200 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:13,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:13,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:58:13,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:13,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:58:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:13,520 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:13,521 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 11:58:13,804 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 11:58:13,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:14,349 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 11:58:14,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:14,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048566226] [2022-11-16 11:58:14,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048566226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:14,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:14,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937835003] [2022-11-16 11:58:14,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:14,351 INFO L87 Difference]: Start difference. First operand 1008 states and 3878 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 11:58:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:14,959 INFO L93 Difference]: Finished difference Result 1040 states and 4032 transitions. [2022-11-16 11:58:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:58:14,960 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 11:58:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:14,963 INFO L225 Difference]: With dead ends: 1040 [2022-11-16 11:58:14,963 INFO L226 Difference]: Without dead ends: 1040 [2022-11-16 11:58:14,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:58:14,963 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:14,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2022-11-16 11:58:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-11-16 11:58:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1034. [2022-11-16 11:58:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1020 states have (on average 3.9352941176470586) internal successors, (4014), 1033 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states 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 11:58:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 4014 transitions. [2022-11-16 11:58:14,981 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 4014 transitions. Word has length 11 [2022-11-16 11:58:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:14,982 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 4014 transitions. [2022-11-16 11:58:14,982 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 11:58:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 4014 transitions. [2022-11-16 11:58:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:14,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:14,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:14,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:15,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:15,186 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1052765771, now seen corresponding path program 3 times [2022-11-16 11:58:15,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470178079] [2022-11-16 11:58:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:58:15,187 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 11:58:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:15,188 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:15,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:15,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:58:15,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:15,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:58:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:15,502 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:15,503 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 11:58:15,821 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 11:58:15,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:16,383 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 11:58:16,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:16,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470178079] [2022-11-16 11:58:16,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470178079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:16,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:16,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:16,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667954580] [2022-11-16 11:58:16,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:16,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:16,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:16,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:16,385 INFO L87 Difference]: Start difference. First operand 1034 states and 4014 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 11:58:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:16,971 INFO L93 Difference]: Finished difference Result 1134 states and 4464 transitions. [2022-11-16 11:58:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:58:16,972 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 11:58:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:16,975 INFO L225 Difference]: With dead ends: 1134 [2022-11-16 11:58:16,975 INFO L226 Difference]: Without dead ends: 1134 [2022-11-16 11:58:16,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:58:16,975 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:16,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-11-16 11:58:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-11-16 11:58:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1046. [2022-11-16 11:58:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1032 states have (on average 3.937984496124031) internal successors, (4064), 1045 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states 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 11:58:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4064 transitions. [2022-11-16 11:58:16,993 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4064 transitions. Word has length 11 [2022-11-16 11:58:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:16,994 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 4064 transitions. [2022-11-16 11:58:16,994 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 11:58:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4064 transitions. [2022-11-16 11:58:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:16,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:16,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:17,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:17,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:17,196 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1051940536, now seen corresponding path program 1 times [2022-11-16 11:58:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:17,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141108356] [2022-11-16 11:58:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:17,196 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 11:58:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:17,197 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:17,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:17,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:58:17,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:17,555 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 11:58:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:17,879 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 11:58:17,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141108356] [2022-11-16 11:58:17,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141108356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:17,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:17,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:58:17,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608111054] [2022-11-16 11:58:17,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:17,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:58:17,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:58:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:58:17,881 INFO L87 Difference]: Start difference. First operand 1046 states and 4064 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11:58:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:19,273 INFO L93 Difference]: Finished difference Result 1345 states and 4870 transitions. [2022-11-16 11:58:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:58:19,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11:58:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:19,277 INFO L225 Difference]: With dead ends: 1345 [2022-11-16 11:58:19,277 INFO L226 Difference]: Without dead ends: 1345 [2022-11-16 11:58:19,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:58:19,278 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 199 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:19,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 46 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 321 Invalid, 0 Unknown, 81 Unchecked, 1.1s Time] [2022-11-16 11:58:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-11-16 11:58:19,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1165. [2022-11-16 11:58:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1151 states have (on average 3.8218940052128585) internal successors, (4399), 1164 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states 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 11:58:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 4399 transitions. [2022-11-16 11:58:19,297 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 4399 transitions. Word has length 11 [2022-11-16 11:58:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:19,298 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 4399 transitions. [2022-11-16 11:58:19,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11:58:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 4399 transitions. [2022-11-16 11:58:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:19,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:19,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:19,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:58:19,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:19,506 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1051941404, now seen corresponding path program 1 times [2022-11-16 11:58:19,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:19,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119650431] [2022-11-16 11:58:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:19,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:58:19,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:19,508 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:19,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:58:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:19,810 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:19,810 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 11:58:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:20,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:21,062 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 11:58:21,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119650431] [2022-11-16 11:58:21,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119650431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:21,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:21,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:21,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808199294] [2022-11-16 11:58:21,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:21,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:21,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:21,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:21,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:21,064 INFO L87 Difference]: Start difference. First operand 1165 states and 4399 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 11:58:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:21,690 INFO L93 Difference]: Finished difference Result 1259 states and 4781 transitions. [2022-11-16 11:58:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:58:21,691 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 11:58:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:21,694 INFO L225 Difference]: With dead ends: 1259 [2022-11-16 11:58:21,694 INFO L226 Difference]: Without dead ends: 1259 [2022-11-16 11:58:21,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:58:21,695 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:21,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-16 11:58:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-11-16 11:58:21,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1227. [2022-11-16 11:58:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1213 states have (on average 3.852431986809563) internal successors, (4673), 1226 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states 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 11:58:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4673 transitions. [2022-11-16 11:58:21,715 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4673 transitions. Word has length 11 [2022-11-16 11:58:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:21,715 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 4673 transitions. [2022-11-16 11:58:21,715 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 11:58:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4673 transitions. [2022-11-16 11:58:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:21,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:21,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:21,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:21,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:21,917 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1051953881, now seen corresponding path program 4 times [2022-11-16 11:58:21,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:21,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087865719] [2022-11-16 11:58:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:58:21,917 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 11:58:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:21,918 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:21,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:22,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:58:22,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:58:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:22,202 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:22,202 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 11:58:22,490 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 11:58:22,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:22,995 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 11:58:22,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:22,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087865719] [2022-11-16 11:58:22,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087865719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:22,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:22,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:58:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442997098] [2022-11-16 11:58:22,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:22,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:58:22,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:58:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:58:22,997 INFO L87 Difference]: Start difference. First operand 1227 states and 4673 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 11:58:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:23,479 INFO L93 Difference]: Finished difference Result 1235 states and 4713 transitions. [2022-11-16 11:58:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:58:23,480 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 11:58:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:23,483 INFO L225 Difference]: With dead ends: 1235 [2022-11-16 11:58:23,483 INFO L226 Difference]: Without dead ends: 1235 [2022-11-16 11:58:23,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:58:23,483 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:23,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-11-16 11:58:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-11-16 11:58:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1227. [2022-11-16 11:58:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1213 states have (on average 3.852431986809563) internal successors, (4673), 1226 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states 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 11:58:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4673 transitions. [2022-11-16 11:58:23,518 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4673 transitions. Word has length 11 [2022-11-16 11:58:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:23,518 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 4673 transitions. [2022-11-16 11:58:23,518 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 11:58:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4673 transitions. [2022-11-16 11:58:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:58:23,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:23,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:23,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:23,732 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1051812134, now seen corresponding path program 2 times [2022-11-16 11:58:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162512064] [2022-11-16 11:58:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:58:23,733 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 11:58:23,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:23,733 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:23,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:23,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:58:23,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:58:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:24,025 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:24,026 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 11:58:24,264 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 11:58:24,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:58:24,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162512064] [2022-11-16 11:58:24,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162512064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:24,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:24,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:58:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595507466] [2022-11-16 11:58:24,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:24,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:58:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:58:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:58:24,266 INFO L87 Difference]: Start difference. First operand 1227 states and 4673 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 11:58:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:24,713 INFO L93 Difference]: Finished difference Result 1344 states and 5094 transitions. [2022-11-16 11:58:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:58:24,713 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 11:58:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:24,716 INFO L225 Difference]: With dead ends: 1344 [2022-11-16 11:58:24,717 INFO L226 Difference]: Without dead ends: 1344 [2022-11-16 11:58:24,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:58:24,717 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:24,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:58:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-11-16 11:58:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1249. [2022-11-16 11:58:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1235 states have (on average 3.8161943319838056) internal successors, (4713), 1248 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states 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 11:58:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4713 transitions. [2022-11-16 11:58:24,748 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4713 transitions. Word has length 11 [2022-11-16 11:58:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:24,749 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 4713 transitions. [2022-11-16 11:58:24,749 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 11:58:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4713 transitions. [2022-11-16 11:58:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:58:24,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:24,750 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 11:58:24,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:24,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:24,950 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1428947491, now seen corresponding path program 3 times [2022-11-16 11:58:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816570261] [2022-11-16 11:58:24,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:58:24,951 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 11:58:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:24,952 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:24,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:25,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:58:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:25,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:58:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:25,344 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:25,344 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 11:58:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:25,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:29,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:58:29,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816570261] [2022-11-16 11:58:29,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816570261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:29,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:58:29,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 11:58:29,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554820501] [2022-11-16 11:58:29,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:29,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:58:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:58:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:58:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:58:29,209 INFO L87 Difference]: Start difference. First operand 1249 states and 4713 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 11:58:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:56,314 INFO L93 Difference]: Finished difference Result 14107 states and 55061 transitions. [2022-11-16 11:58:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:58:56,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 11:58:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:56,368 INFO L225 Difference]: With dead ends: 14107 [2022-11-16 11:58:56,369 INFO L226 Difference]: Without dead ends: 14107 [2022-11-16 11:58:56,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:58:56,369 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3870 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3870 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:56,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3870 Valid, 360 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-11-16 11:58:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14107 states. [2022-11-16 11:58:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14107 to 1261. [2022-11-16 11:58:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1247 states have (on average 3.7987169206094626) internal successors, (4737), 1260 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states 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 11:58:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4737 transitions. [2022-11-16 11:58:56,567 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4737 transitions. Word has length 12 [2022-11-16 11:58:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:56,569 INFO L495 AbstractCegarLoop]: Abstraction has 1261 states and 4737 transitions. [2022-11-16 11:58:56,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 11:58:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4737 transitions. [2022-11-16 11:58:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:58:56,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:56,571 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-16 11:58:56,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:56,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:56,784 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:58:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:56,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1281909664, now seen corresponding path program 3 times [2022-11-16 11:58:56,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:58:56,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113403668] [2022-11-16 11:58:56,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:58:56,785 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 11:58:56,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:58:56,786 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:56,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:58:57,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:58:57,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:58:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:57,236 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:58:57,237 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 11:58:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:57,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:57,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 11:58:57,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 11:58:57,948 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 11:59:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:00,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:00,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113403668] [2022-11-16 11:59:00,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113403668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:00,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:00,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 11:59:00,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309959155] [2022-11-16 11:59:00,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:00,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:59:00,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:00,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:59:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:59:00,109 INFO L87 Difference]: Start difference. First operand 1261 states and 4737 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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 11:59:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:16,180 INFO L93 Difference]: Finished difference Result 3391 states and 12467 transitions. [2022-11-16 11:59:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:59:16,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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 11:59:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:16,190 INFO L225 Difference]: With dead ends: 3391 [2022-11-16 11:59:16,190 INFO L226 Difference]: Without dead ends: 3391 [2022-11-16 11:59:16,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:59:16,191 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 587 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:16,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 168 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1367 Invalid, 0 Unknown, 226 Unchecked, 10.6s Time] [2022-11-16 11:59:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2022-11-16 11:59:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 1988. [2022-11-16 11:59:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1974 states have (on average 3.9903748733535966) internal successors, (7877), 1987 states have internal predecessors, (7877), 0 states have call successors, (0), 0 states 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 11:59:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 7877 transitions. [2022-11-16 11:59:16,246 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 7877 transitions. Word has length 12 [2022-11-16 11:59:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:16,246 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 7877 transitions. [2022-11-16 11:59:16,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 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 11:59:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 7877 transitions. [2022-11-16 11:59:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:16,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:16,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:16,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:16,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:16,461 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1075024770, now seen corresponding path program 5 times [2022-11-16 11:59:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:16,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157329163] [2022-11-16 11:59:16,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:59:16,462 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 11:59:16,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:16,463 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:16,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:16,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:59:16,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:59:16,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:16,791 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:16,791 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 11:59:17,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:59:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:17,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:17,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 11:59:17,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 11:59:17,463 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 11:59:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:18,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:18,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157329163] [2022-11-16 11:59:18,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157329163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:18,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:18,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:59:18,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88362253] [2022-11-16 11:59:18,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:18,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:59:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:59:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:59:18,810 INFO L87 Difference]: Start difference. First operand 1988 states and 7877 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:59:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:20,352 INFO L93 Difference]: Finished difference Result 2780 states and 10915 transitions. [2022-11-16 11:59:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:59:20,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:59:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:20,362 INFO L225 Difference]: With dead ends: 2780 [2022-11-16 11:59:20,362 INFO L226 Difference]: Without dead ends: 2780 [2022-11-16 11:59:20,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:59:20,362 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:20,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 43 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 127 Unchecked, 1.3s Time] [2022-11-16 11:59:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2022-11-16 11:59:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2276. [2022-11-16 11:59:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2262 states have (on average 4.062334217506631) internal successors, (9189), 2275 states have internal predecessors, (9189), 0 states have call successors, (0), 0 states 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 11:59:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 9189 transitions. [2022-11-16 11:59:20,419 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 9189 transitions. Word has length 12 [2022-11-16 11:59:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:20,419 INFO L495 AbstractCegarLoop]: Abstraction has 2276 states and 9189 transitions. [2022-11-16 11:59:20,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:59:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 9189 transitions. [2022-11-16 11:59:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:20,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:20,421 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:20,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:20,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:20,633 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:20,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:20,634 INFO L85 PathProgramCache]: Analyzing trace with hash -916013975, now seen corresponding path program 2 times [2022-11-16 11:59:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:20,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683052807] [2022-11-16 11:59:20,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:59:20,634 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 11:59:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:20,635 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:20,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:20,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:59:20,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:20,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:59:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:20,983 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:20,983 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 11:59:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:21,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:23,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:23,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683052807] [2022-11-16 11:59:23,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683052807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:23,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:23,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:59:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104767682] [2022-11-16 11:59:23,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:23,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:59:23,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:59:23,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:59:23,486 INFO L87 Difference]: Start difference. First operand 2276 states and 9189 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:59:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:33,209 INFO L93 Difference]: Finished difference Result 3928 states and 16399 transitions. [2022-11-16 11:59:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:59:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:59:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:33,220 INFO L225 Difference]: With dead ends: 3928 [2022-11-16 11:59:33,220 INFO L226 Difference]: Without dead ends: 3928 [2022-11-16 11:59:33,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:59:33,220 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 346 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:33,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 94 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 636 Invalid, 0 Unknown, 169 Unchecked, 2.9s Time] [2022-11-16 11:59:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2022-11-16 11:59:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3006. [2022-11-16 11:59:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 2992 states have (on average 4.206550802139038) internal successors, (12586), 3005 states have internal predecessors, (12586), 0 states have call successors, (0), 0 states 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 11:59:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 12586 transitions. [2022-11-16 11:59:33,305 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 12586 transitions. Word has length 12 [2022-11-16 11:59:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:33,306 INFO L495 AbstractCegarLoop]: Abstraction has 3006 states and 12586 transitions. [2022-11-16 11:59:33,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:59:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 12586 transitions. [2022-11-16 11:59:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:33,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:33,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:33,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:33,508 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1665588254, now seen corresponding path program 1 times [2022-11-16 11:59:33,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044537832] [2022-11-16 11:59:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:33,509 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 11:59:33,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:33,510 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:33,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:33,833 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:33,833 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 11:59:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:59:34,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:59:34,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:34,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044537832] [2022-11-16 11:59:34,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044537832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:34,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:34,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:34,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300780943] [2022-11-16 11:59:34,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:34,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:34,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:34,757 INFO L87 Difference]: Start difference. First operand 3006 states and 12586 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 11:59:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:35,261 INFO L93 Difference]: Finished difference Result 3072 states and 12876 transitions. [2022-11-16 11:59:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:59:35,262 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 11:59:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:35,270 INFO L225 Difference]: With dead ends: 3072 [2022-11-16 11:59:35,271 INFO L226 Difference]: Without dead ends: 3072 [2022-11-16 11:59:35,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:35,271 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:35,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-11-16 11:59:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-11-16 11:59:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3011. [2022-11-16 11:59:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 2997 states have (on average 4.204537871204538) internal successors, (12601), 3010 states have internal predecessors, (12601), 0 states have call successors, (0), 0 states 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 11:59:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 12601 transitions. [2022-11-16 11:59:35,359 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 12601 transitions. Word has length 12 [2022-11-16 11:59:35,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:35,359 INFO L495 AbstractCegarLoop]: Abstraction has 3011 states and 12601 transitions. [2022-11-16 11:59:35,359 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 11:59:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 12601 transitions. [2022-11-16 11:59:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:35,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:35,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:35,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:35,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:35,562 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:35,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1123267124, now seen corresponding path program 2 times [2022-11-16 11:59:35,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:35,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091557370] [2022-11-16 11:59:35,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:59:35,563 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 11:59:35,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:35,563 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:35,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:35,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:59:35,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:35,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:35,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:35,927 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:35,927 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 11:59:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:36,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:36,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:36,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091557370] [2022-11-16 11:59:36,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091557370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:36,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:36,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:36,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867624764] [2022-11-16 11:59:36,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:36,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:36,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:36,936 INFO L87 Difference]: Start difference. First operand 3011 states and 12601 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 11:59:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:37,532 INFO L93 Difference]: Finished difference Result 3101 states and 13006 transitions. [2022-11-16 11:59:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:59:37,534 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 11:59:37,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:37,543 INFO L225 Difference]: With dead ends: 3101 [2022-11-16 11:59:37,543 INFO L226 Difference]: Without dead ends: 3101 [2022-11-16 11:59:37,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:37,543 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:37,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-11-16 11:59:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2022-11-16 11:59:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 3040. [2022-11-16 11:59:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3026 states have (on average 4.208526107072042) internal successors, (12735), 3039 states have internal predecessors, (12735), 0 states have call successors, (0), 0 states 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 11:59:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 12735 transitions. [2022-11-16 11:59:37,613 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 12735 transitions. Word has length 12 [2022-11-16 11:59:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:37,613 INFO L495 AbstractCegarLoop]: Abstraction has 3040 states and 12735 transitions. [2022-11-16 11:59:37,613 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 11:59:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 12735 transitions. [2022-11-16 11:59:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:37,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:37,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:37,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:37,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:37,828 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1123251748, now seen corresponding path program 1 times [2022-11-16 11:59:37,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:37,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820470348] [2022-11-16 11:59:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:37,829 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 11:59:37,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:37,830 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:37,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:38,165 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:38,165 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 11:59:38,541 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 11:59:38,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:39,153 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 11:59:39,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820470348] [2022-11-16 11:59:39,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820470348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:39,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:39,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:39,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516119969] [2022-11-16 11:59:39,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:39,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:39,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:39,155 INFO L87 Difference]: Start difference. First operand 3040 states and 12735 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 11:59:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:39,469 INFO L93 Difference]: Finished difference Result 3906 states and 17818 transitions. [2022-11-16 11:59:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:59:39,471 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 11:59:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:39,483 INFO L225 Difference]: With dead ends: 3906 [2022-11-16 11:59:39,483 INFO L226 Difference]: Without dead ends: 3906 [2022-11-16 11:59:39,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:39,483 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:39,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-11-16 11:59:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3906 states. [2022-11-16 11:59:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3906 to 3428. [2022-11-16 11:59:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3414 states have (on average 4.382835383714118) internal successors, (14963), 3427 states have internal predecessors, (14963), 0 states have call successors, (0), 0 states 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 11:59:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 14963 transitions. [2022-11-16 11:59:39,566 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 14963 transitions. Word has length 12 [2022-11-16 11:59:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:39,567 INFO L495 AbstractCegarLoop]: Abstraction has 3428 states and 14963 transitions. [2022-11-16 11:59:39,567 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 11:59:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 14963 transitions. [2022-11-16 11:59:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:39,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:39,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:39,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:39,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:39,770 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1123246664, now seen corresponding path program 3 times [2022-11-16 11:59:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057389967] [2022-11-16 11:59:39,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:59:39,771 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 11:59:39,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:39,772 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:39,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:39,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:59:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:40,109 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:40,110 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 11:59:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:41,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:41,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057389967] [2022-11-16 11:59:41,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057389967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:41,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:41,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:41,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265847897] [2022-11-16 11:59:41,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:41,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:41,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:41,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:41,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:41,071 INFO L87 Difference]: Start difference. First operand 3428 states and 14963 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 11:59:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:41,644 INFO L93 Difference]: Finished difference Result 3486 states and 15229 transitions. [2022-11-16 11:59:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:59:41,645 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 11:59:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:41,658 INFO L225 Difference]: With dead ends: 3486 [2022-11-16 11:59:41,658 INFO L226 Difference]: Without dead ends: 3486 [2022-11-16 11:59:41,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:41,659 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:41,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 21 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-16 11:59:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2022-11-16 11:59:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 3444. [2022-11-16 11:59:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3430 states have (on average 4.387755102040816) internal successors, (15050), 3443 states have internal predecessors, (15050), 0 states have call successors, (0), 0 states 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 11:59:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 15050 transitions. [2022-11-16 11:59:41,790 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 15050 transitions. Word has length 12 [2022-11-16 11:59:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:41,790 INFO L495 AbstractCegarLoop]: Abstraction has 3444 states and 15050 transitions. [2022-11-16 11:59:41,790 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 11:59:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 15050 transitions. [2022-11-16 11:59:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:41,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:41,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:41,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:42,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:42,005 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1123246168, now seen corresponding path program 2 times [2022-11-16 11:59:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:42,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352118818] [2022-11-16 11:59:42,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:59:42,005 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 11:59:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:42,006 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:42,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:42,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:59:42,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:42,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:42,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:42,391 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:42,392 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 11:59:42,707 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 11:59:42,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:43,349 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 11:59:43,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352118818] [2022-11-16 11:59:43,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352118818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:43,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:43,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:43,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931634860] [2022-11-16 11:59:43,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:43,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:43,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:43,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:43,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:43,351 INFO L87 Difference]: Start difference. First operand 3444 states and 15050 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 11:59:44,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:44,119 INFO L93 Difference]: Finished difference Result 4360 states and 19930 transitions. [2022-11-16 11:59:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:59:44,121 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 11:59:44,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:44,134 INFO L225 Difference]: With dead ends: 4360 [2022-11-16 11:59:44,134 INFO L226 Difference]: Without dead ends: 4360 [2022-11-16 11:59:44,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:44,135 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:44,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 25 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 84 Unchecked, 0.7s Time] [2022-11-16 11:59:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2022-11-16 11:59:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 3811. [2022-11-16 11:59:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3797 states have (on average 4.527521727679747) internal successors, (17191), 3810 states have internal predecessors, (17191), 0 states have call successors, (0), 0 states 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 11:59:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 17191 transitions. [2022-11-16 11:59:44,281 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 17191 transitions. Word has length 12 [2022-11-16 11:59:44,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:44,281 INFO L495 AbstractCegarLoop]: Abstraction has 3811 states and 17191 transitions. [2022-11-16 11:59:44,281 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 11:59:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 17191 transitions. [2022-11-16 11:59:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:44,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:44,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:44,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:44,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:44,496 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:44,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1118148838, now seen corresponding path program 3 times [2022-11-16 11:59:44,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:44,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086500251] [2022-11-16 11:59:44,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:59:44,497 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 11:59:44,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:44,497 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:44,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:44,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:59:44,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:44,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:44,881 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:44,881 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 11:59:45,239 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 11:59:45,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:45,944 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 11:59:45,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086500251] [2022-11-16 11:59:45,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086500251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:45,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:45,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:45,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663814504] [2022-11-16 11:59:45,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:45,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:45,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:45,946 INFO L87 Difference]: Start difference. First operand 3811 states and 17191 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 11:59:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:46,541 INFO L93 Difference]: Finished difference Result 3914 states and 17749 transitions. [2022-11-16 11:59:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:59:46,543 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 11:59:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:46,557 INFO L225 Difference]: With dead ends: 3914 [2022-11-16 11:59:46,558 INFO L226 Difference]: Without dead ends: 3914 [2022-11-16 11:59:46,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:46,560 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:46,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-11-16 11:59:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2022-11-16 11:59:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3851. [2022-11-16 11:59:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 3837 states have (on average 4.534010946051603) internal successors, (17397), 3850 states have internal predecessors, (17397), 0 states have call successors, (0), 0 states 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 11:59:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 17397 transitions. [2022-11-16 11:59:46,761 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 17397 transitions. Word has length 12 [2022-11-16 11:59:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:46,761 INFO L495 AbstractCegarLoop]: Abstraction has 3851 states and 17397 transitions. [2022-11-16 11:59:46,761 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 11:59:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 17397 transitions. [2022-11-16 11:59:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:46,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:46,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:46,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:46,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:46,976 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash -428430702, now seen corresponding path program 4 times [2022-11-16 11:59:46,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:46,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924111691] [2022-11-16 11:59:46,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:59:46,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:46,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:46,978 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:46,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:47,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:59:47,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:47,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:47,314 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:47,314 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 11:59:47,626 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 11:59:47,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:48,240 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 11:59:48,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:48,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924111691] [2022-11-16 11:59:48,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924111691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:48,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:48,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020107958] [2022-11-16 11:59:48,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:48,241 INFO L87 Difference]: Start difference. First operand 3851 states and 17397 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 11:59:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:48,867 INFO L93 Difference]: Finished difference Result 4502 states and 20690 transitions. [2022-11-16 11:59:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:59:48,869 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 11:59:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:48,881 INFO L225 Difference]: With dead ends: 4502 [2022-11-16 11:59:48,881 INFO L226 Difference]: Without dead ends: 4502 [2022-11-16 11:59:48,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:48,881 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:48,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 20 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-11-16 11:59:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4502 states. [2022-11-16 11:59:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4502 to 4213. [2022-11-16 11:59:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4199 states have (on average 4.563705644201001) internal successors, (19163), 4212 states have internal predecessors, (19163), 0 states have call successors, (0), 0 states 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 11:59:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 19163 transitions. [2022-11-16 11:59:48,964 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 19163 transitions. Word has length 12 [2022-11-16 11:59:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:48,964 INFO L495 AbstractCegarLoop]: Abstraction has 4213 states and 19163 transitions. [2022-11-16 11:59:48,964 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 11:59:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 19163 transitions. [2022-11-16 11:59:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:48,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:48,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:48,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:49,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:49,179 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash -428223808, now seen corresponding path program 4 times [2022-11-16 11:59:49,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:49,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61007934] [2022-11-16 11:59:49,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:59:49,180 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 11:59:49,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:49,181 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:49,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:49,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:59:49,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:49,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:49,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:49,554 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:49,554 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 11:59:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:49,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:50,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61007934] [2022-11-16 11:59:50,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61007934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:50,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:50,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034076341] [2022-11-16 11:59:50,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:50,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:50,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:50,482 INFO L87 Difference]: Start difference. First operand 4213 states and 19163 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 11:59:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:51,165 INFO L93 Difference]: Finished difference Result 4222 states and 19190 transitions. [2022-11-16 11:59:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:59:51,167 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 11:59:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:51,182 INFO L225 Difference]: With dead ends: 4222 [2022-11-16 11:59:51,182 INFO L226 Difference]: Without dead ends: 4222 [2022-11-16 11:59:51,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:51,183 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:51,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 54 Unchecked, 0.6s Time] [2022-11-16 11:59:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2022-11-16 11:59:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 4213. [2022-11-16 11:59:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4199 states have (on average 4.563705644201001) internal successors, (19163), 4212 states have internal predecessors, (19163), 0 states have call successors, (0), 0 states 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 11:59:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 19163 transitions. [2022-11-16 11:59:51,315 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 19163 transitions. Word has length 12 [2022-11-16 11:59:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:51,315 INFO L495 AbstractCegarLoop]: Abstraction has 4213 states and 19163 transitions. [2022-11-16 11:59:51,315 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 11:59:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 19163 transitions. [2022-11-16 11:59:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:51,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:51,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:51,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:59:51,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:51,517 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash -428223312, now seen corresponding path program 5 times [2022-11-16 11:59:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:51,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186456503] [2022-11-16 11:59:51,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:59:51,518 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 11:59:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:51,520 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:51,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:51,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:59:51,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:51,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:59:51,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:51,910 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:51,911 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 11:59:52,319 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 11:59:52,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:53,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:53,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186456503] [2022-11-16 11:59:53,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186456503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:53,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:53,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:59:53,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606894187] [2022-11-16 11:59:53,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:53,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:59:53,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:59:53,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:59:53,134 INFO L87 Difference]: Start difference. First operand 4213 states and 19163 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 11:59:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:53,904 INFO L93 Difference]: Finished difference Result 4705 states and 21774 transitions. [2022-11-16 11:59:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:59:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 11:59:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:53,920 INFO L225 Difference]: With dead ends: 4705 [2022-11-16 11:59:53,920 INFO L226 Difference]: Without dead ends: 4705 [2022-11-16 11:59:53,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:59:53,921 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:53,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2022-11-16 11:59:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4705 states. [2022-11-16 11:59:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4705 to 4399. [2022-11-16 11:59:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4385 states have (on average 4.616191562143672) internal successors, (20242), 4398 states have internal predecessors, (20242), 0 states have call successors, (0), 0 states 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 11:59:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 20242 transitions. [2022-11-16 11:59:54,022 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 20242 transitions. Word has length 12 [2022-11-16 11:59:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:54,022 INFO L495 AbstractCegarLoop]: Abstraction has 4399 states and 20242 transitions. [2022-11-16 11:59:54,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 11:59:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 20242 transitions. [2022-11-16 11:59:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:54,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:54,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:54,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:54,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:54,224 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:54,225 INFO L85 PathProgramCache]: Analyzing trace with hash -270241422, now seen corresponding path program 6 times [2022-11-16 11:59:54,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:54,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732162999] [2022-11-16 11:59:54,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:59:54,225 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 11:59:54,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:54,226 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:54,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:54,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 11:59:54,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:54,601 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:54,601 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 11:59:54,926 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 11:59:54,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:55,589 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 11:59:55,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732162999] [2022-11-16 11:59:55,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732162999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:55,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:55,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073561284] [2022-11-16 11:59:55,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:55,591 INFO L87 Difference]: Start difference. First operand 4399 states and 20242 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 11:59:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:56,232 INFO L93 Difference]: Finished difference Result 4518 states and 20793 transitions. [2022-11-16 11:59:56,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:59:56,234 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 11:59:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:56,248 INFO L225 Difference]: With dead ends: 4518 [2022-11-16 11:59:56,248 INFO L226 Difference]: Without dead ends: 4518 [2022-11-16 11:59:56,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:56,248 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:56,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 38 Unchecked, 0.6s Time] [2022-11-16 11:59:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2022-11-16 11:59:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 4447. [2022-11-16 11:59:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4433 states have (on average 4.619896232799459) internal successors, (20480), 4446 states have internal predecessors, (20480), 0 states have call successors, (0), 0 states 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 11:59:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 20480 transitions. [2022-11-16 11:59:56,335 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 20480 transitions. Word has length 12 [2022-11-16 11:59:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:56,336 INFO L495 AbstractCegarLoop]: Abstraction has 4447 states and 20480 transitions. [2022-11-16 11:59:56,336 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 11:59:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 20480 transitions. [2022-11-16 11:59:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:56,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:56,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:56,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Ended with exit code 0 [2022-11-16 11:59:56,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:56,538 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash -270240492, now seen corresponding path program 7 times [2022-11-16 11:59:56,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:56,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412129343] [2022-11-16 11:59:56,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:59:56,539 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 11:59:56,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:56,540 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:56,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:56,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:56,870 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:56,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:59:57,199 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 11:59:57,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:57,769 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 11:59:57,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:57,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412129343] [2022-11-16 11:59:57,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412129343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:57,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:57,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908949678] [2022-11-16 11:59:57,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:57,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:57,770 INFO L87 Difference]: Start difference. First operand 4447 states and 20480 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 11:59:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:58,386 INFO L93 Difference]: Finished difference Result 4503 states and 20769 transitions. [2022-11-16 11:59:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:59:58,388 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 11:59:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:58,401 INFO L225 Difference]: With dead ends: 4503 [2022-11-16 11:59:58,401 INFO L226 Difference]: Without dead ends: 4503 [2022-11-16 11:59:58,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:59:58,402 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:58,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-11-16 11:59:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2022-11-16 11:59:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4463. [2022-11-16 11:59:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4449 states have (on average 4.621937514048101) internal successors, (20563), 4462 states have internal predecessors, (20563), 0 states have call successors, (0), 0 states 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 11:59:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 20563 transitions. [2022-11-16 11:59:58,494 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 20563 transitions. Word has length 12 [2022-11-16 11:59:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:58,494 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 20563 transitions. [2022-11-16 11:59:58,494 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 11:59:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 20563 transitions. [2022-11-16 11:59:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:58,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:58,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:58,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:58,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:58,696 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 11:59:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:58,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1719515297, now seen corresponding path program 1 times [2022-11-16 11:59:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:58,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437236863] [2022-11-16 11:59:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:58,697 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 11:59:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:58,698 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:58,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 11:59:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:59:58,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:59,034 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:59:59,034 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 11:59:59,369 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 11:59:59,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:59,959 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 11:59:59,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:59,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437236863] [2022-11-16 11:59:59,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437236863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:59,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:59,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:59:59,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165593598] [2022-11-16 11:59:59,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:59,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:59:59,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:59,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:59:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:59,961 INFO L87 Difference]: Start difference. First operand 4463 states and 20563 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 12:00:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:00,195 INFO L93 Difference]: Finished difference Result 4483 states and 20663 transitions. [2022-11-16 12:00:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:00:00,197 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 12:00:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:00,213 INFO L225 Difference]: With dead ends: 4483 [2022-11-16 12:00:00,213 INFO L226 Difference]: Without dead ends: 4483 [2022-11-16 12:00:00,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:00,214 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:00,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-11-16 12:00:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2022-11-16 12:00:00,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 4483. [2022-11-16 12:00:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 4469 states have (on average 4.623629447303648) internal successors, (20663), 4482 states have internal predecessors, (20663), 0 states have call successors, (0), 0 states 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 12:00:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 20663 transitions. [2022-11-16 12:00:00,343 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 20663 transitions. Word has length 12 [2022-11-16 12:00:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:00,344 INFO L495 AbstractCegarLoop]: Abstraction has 4483 states and 20663 transitions. [2022-11-16 12:00:00,344 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 12:00:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 20663 transitions. [2022-11-16 12:00:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:00,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:00,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:00,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:00,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:00,546 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1719676776, now seen corresponding path program 1 times [2022-11-16 12:00:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:00,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122313992] [2022-11-16 12:00:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:00,547 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 12:00:00,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:00,549 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:00,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:00,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:00:00,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:00,893 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:00,894 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 12:00:01,225 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 12:00:01,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:01,822 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 12:00:01,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:01,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122313992] [2022-11-16 12:00:01,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122313992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:01,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:01,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:00:01,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213207204] [2022-11-16 12:00:01,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:01,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:01,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:01,824 INFO L87 Difference]: Start difference. First operand 4483 states and 20663 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 12:00:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:02,051 INFO L93 Difference]: Finished difference Result 4523 states and 20833 transitions. [2022-11-16 12:00:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:00:02,052 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 12:00:02,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:02,065 INFO L225 Difference]: With dead ends: 4523 [2022-11-16 12:00:02,065 INFO L226 Difference]: Without dead ends: 4523 [2022-11-16 12:00:02,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:02,066 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:02,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-11-16 12:00:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2022-11-16 12:00:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 4513. [2022-11-16 12:00:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4499 states have (on average 4.62169370971327) internal successors, (20793), 4512 states have internal predecessors, (20793), 0 states have call successors, (0), 0 states 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 12:00:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 20793 transitions. [2022-11-16 12:00:02,155 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 20793 transitions. Word has length 12 [2022-11-16 12:00:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:02,155 INFO L495 AbstractCegarLoop]: Abstraction has 4513 states and 20793 transitions. [2022-11-16 12:00:02,155 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 12:00:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 20793 transitions. [2022-11-16 12:00:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:02,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:02,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:02,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:02,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:02,357 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1719648876, now seen corresponding path program 2 times [2022-11-16 12:00:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913109461] [2022-11-16 12:00:02,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:00:02,358 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 12:00:02,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:02,359 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:02,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:02,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:00:02,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:02,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:00:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:02,762 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:02,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:00:03,084 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 12:00:03,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:03,726 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 12:00:03,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:03,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913109461] [2022-11-16 12:00:03,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913109461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:03,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:03,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:00:03,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206340046] [2022-11-16 12:00:03,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:03,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:03,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:03,727 INFO L87 Difference]: Start difference. First operand 4513 states and 20793 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 12:00:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:04,553 INFO L93 Difference]: Finished difference Result 4971 states and 22853 transitions. [2022-11-16 12:00:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:00:04,555 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 12:00:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:04,570 INFO L225 Difference]: With dead ends: 4971 [2022-11-16 12:00:04,570 INFO L226 Difference]: Without dead ends: 4971 [2022-11-16 12:00:04,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:04,570 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:04,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 58 Unchecked, 0.7s Time] [2022-11-16 12:00:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2022-11-16 12:00:04,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 4613. [2022-11-16 12:00:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4599 states have (on average 4.623396390519678) internal successors, (21263), 4612 states have internal predecessors, (21263), 0 states have call successors, (0), 0 states 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 12:00:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 21263 transitions. [2022-11-16 12:00:04,662 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 21263 transitions. Word has length 12 [2022-11-16 12:00:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:04,663 INFO L495 AbstractCegarLoop]: Abstraction has 4613 states and 21263 transitions. [2022-11-16 12:00:04,663 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 12:00:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 21263 transitions. [2022-11-16 12:00:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:04,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:04,665 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:04,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:04,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:04,870 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1724146356, now seen corresponding path program 6 times [2022-11-16 12:00:04,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:04,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785840785] [2022-11-16 12:00:04,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:00:04,870 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 12:00:04,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:04,871 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:04,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:05,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:00:05,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:00:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:05,268 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:05,268 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 12:00:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:05,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:06,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:06,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785840785] [2022-11-16 12:00:06,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785840785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:06,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:06,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:00:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492480815] [2022-11-16 12:00:06,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:06,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:00:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:06,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:00:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:00:06,972 INFO L87 Difference]: Start difference. First operand 4613 states and 21263 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 12:00:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:09,785 INFO L93 Difference]: Finished difference Result 4623 states and 21303 transitions. [2022-11-16 12:00:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:00:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 12:00:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:09,800 INFO L225 Difference]: With dead ends: 4623 [2022-11-16 12:00:09,800 INFO L226 Difference]: Without dead ends: 4623 [2022-11-16 12:00:09,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:00:09,801 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:09,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 60 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 78 Unchecked, 1.2s Time] [2022-11-16 12:00:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4623 states. [2022-11-16 12:00:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4623 to 4623. [2022-11-16 12:00:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4609 states have (on average 4.622043827294424) internal successors, (21303), 4622 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states 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 12:00:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 21303 transitions. [2022-11-16 12:00:09,907 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 21303 transitions. Word has length 12 [2022-11-16 12:00:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:09,907 INFO L495 AbstractCegarLoop]: Abstraction has 4623 states and 21303 transitions. [2022-11-16 12:00:09,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 12:00:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 21303 transitions. [2022-11-16 12:00:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:09,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:09,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:09,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:10,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:10,109 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1749412007, now seen corresponding path program 2 times [2022-11-16 12:00:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:10,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068729010] [2022-11-16 12:00:10,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:00:10,110 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 12:00:10,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:10,110 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:10,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:10,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:00:10,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:00:10,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:10,481 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:10,481 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 12:00:10,793 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 12:00:10,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:11,399 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 12:00:11,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:11,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068729010] [2022-11-16 12:00:11,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068729010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:11,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:11,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:00:11,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976763906] [2022-11-16 12:00:11,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:11,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:11,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:11,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:11,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:11,401 INFO L87 Difference]: Start difference. First operand 4623 states and 21303 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 12:00:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:11,941 INFO L93 Difference]: Finished difference Result 4693 states and 21663 transitions. [2022-11-16 12:00:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:00:11,942 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 12:00:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:11,955 INFO L225 Difference]: With dead ends: 4693 [2022-11-16 12:00:11,956 INFO L226 Difference]: Without dead ends: 4693 [2022-11-16 12:00:11,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:11,956 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:11,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-16 12:00:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2022-11-16 12:00:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4663. [2022-11-16 12:00:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4649 states have (on average 4.625295762529576) internal successors, (21503), 4662 states have internal predecessors, (21503), 0 states have call successors, (0), 0 states 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 12:00:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 21503 transitions. [2022-11-16 12:00:12,086 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 21503 transitions. Word has length 12 [2022-11-16 12:00:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:12,086 INFO L495 AbstractCegarLoop]: Abstraction has 4663 states and 21503 transitions. [2022-11-16 12:00:12,086 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 12:00:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 21503 transitions. [2022-11-16 12:00:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:12,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:12,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:12,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:12,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:12,289 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1749008387, now seen corresponding path program 3 times [2022-11-16 12:00:12,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:12,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314563279] [2022-11-16 12:00:12,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:00:12,290 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 12:00:12,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:12,291 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:12,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:12,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:00:12,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:12,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:00:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:12,663 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:12,663 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 12:00:12,992 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 12:00:12,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:13,585 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 12:00:13,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314563279] [2022-11-16 12:00:13,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314563279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:13,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:13,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:00:13,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140496450] [2022-11-16 12:00:13,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:13,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:13,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:13,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:13,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:13,587 INFO L87 Difference]: Start difference. First operand 4663 states and 21503 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 12:00:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:14,211 INFO L93 Difference]: Finished difference Result 4773 states and 22047 transitions. [2022-11-16 12:00:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:00:14,213 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 12:00:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:14,227 INFO L225 Difference]: With dead ends: 4773 [2022-11-16 12:00:14,227 INFO L226 Difference]: Without dead ends: 4773 [2022-11-16 12:00:14,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:14,227 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:14,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-11-16 12:00:14,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2022-11-16 12:00:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4743. [2022-11-16 12:00:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4729 states have (on average 4.6345950518079935) internal successors, (21917), 4742 states have internal predecessors, (21917), 0 states have call successors, (0), 0 states 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 12:00:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 21917 transitions. [2022-11-16 12:00:14,335 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 21917 transitions. Word has length 12 [2022-11-16 12:00:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:14,336 INFO L495 AbstractCegarLoop]: Abstraction has 4743 states and 21917 transitions. [2022-11-16 12:00:14,336 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 12:00:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 21917 transitions. [2022-11-16 12:00:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:14,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:14,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:14,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:14,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:14,538 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:14,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1749165557, now seen corresponding path program 4 times [2022-11-16 12:00:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:14,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805028681] [2022-11-16 12:00:14,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:00:14,539 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 12:00:14,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:14,540 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:14,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (65)] Waiting until timeout for monitored process [2022-11-16 12:00:14,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:00:14,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:00:14,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:14,902 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:14,902 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 12:00:15,255 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 12:00:15,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:15,801 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 12:00:15,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805028681] [2022-11-16 12:00:15,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805028681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:15,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:15,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:00:15,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920096942] [2022-11-16 12:00:15,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:15,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:15,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:15,803 INFO L87 Difference]: Start difference. First operand 4743 states and 21917 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 12:00:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:16,027 INFO L93 Difference]: Finished difference Result 4753 states and 21957 transitions. [2022-11-16 12:00:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:00:16,028 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 12:00:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:16,046 INFO L225 Difference]: With dead ends: 4753 [2022-11-16 12:00:16,047 INFO L226 Difference]: Without dead ends: 4753 [2022-11-16 12:00:16,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:16,047 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:16,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-16 12:00:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4753 states. [2022-11-16 12:00:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4753 to 4733. [2022-11-16 12:00:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4733 states, 4719 states have (on average 4.631701631701632) internal successors, (21857), 4732 states have internal predecessors, (21857), 0 states have call successors, (0), 0 states 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 12:00:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4733 states to 4733 states and 21857 transitions. [2022-11-16 12:00:16,153 INFO L78 Accepts]: Start accepts. Automaton has 4733 states and 21857 transitions. Word has length 12 [2022-11-16 12:00:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:16,154 INFO L495 AbstractCegarLoop]: Abstraction has 4733 states and 21857 transitions. [2022-11-16 12:00:16,154 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 12:00:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4733 states and 21857 transitions. [2022-11-16 12:00:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:16,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:16,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:16,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (65)] Ended with exit code 0 [2022-11-16 12:00:16,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:16,356 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1749169866, now seen corresponding path program 3 times [2022-11-16 12:00:16,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:16,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353511737] [2022-11-16 12:00:16,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:00:16,357 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 12:00:16,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:16,358 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:16,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (66)] Waiting until timeout for monitored process [2022-11-16 12:00:16,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:00:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:00:16,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:16,726 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:16,727 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 12:00:17,052 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 12:00:17,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:17,671 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 12:00:17,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:17,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353511737] [2022-11-16 12:00:17,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353511737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:17,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:17,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:00:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507636536] [2022-11-16 12:00:17,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:17,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:17,673 INFO L87 Difference]: Start difference. First operand 4733 states and 21857 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 12:00:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:18,303 INFO L93 Difference]: Finished difference Result 4773 states and 22027 transitions. [2022-11-16 12:00:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:00:18,304 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 12:00:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:18,319 INFO L225 Difference]: With dead ends: 4773 [2022-11-16 12:00:18,319 INFO L226 Difference]: Without dead ends: 4773 [2022-11-16 12:00:18,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:18,320 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:18,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time] [2022-11-16 12:00:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2022-11-16 12:00:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4753. [2022-11-16 12:00:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4739 states have (on average 4.629035661531969) internal successors, (21937), 4752 states have internal predecessors, (21937), 0 states have call successors, (0), 0 states 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 12:00:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 21937 transitions. [2022-11-16 12:00:18,409 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 21937 transitions. Word has length 12 [2022-11-16 12:00:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:18,409 INFO L495 AbstractCegarLoop]: Abstraction has 4753 states and 21937 transitions. [2022-11-16 12:00:18,409 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 12:00:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 21937 transitions. [2022-11-16 12:00:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:18,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:18,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:18,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (66)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:18,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:18,624 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1749141966, now seen corresponding path program 4 times [2022-11-16 12:00:18,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:18,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206049985] [2022-11-16 12:00:18,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:00:18,625 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 12:00:18,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:18,626 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:18,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (67)] Waiting until timeout for monitored process [2022-11-16 12:00:18,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:00:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:18,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:00:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:18,968 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:18,969 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 12:00:19,325 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 12:00:19,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:19,904 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 12:00:19,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206049985] [2022-11-16 12:00:19,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206049985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:19,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:19,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:00:19,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447792344] [2022-11-16 12:00:19,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:19,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:19,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:19,906 INFO L87 Difference]: Start difference. First operand 4753 states and 21937 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 12:00:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:20,406 INFO L93 Difference]: Finished difference Result 4783 states and 22067 transitions. [2022-11-16 12:00:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:00:20,407 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 12:00:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:20,422 INFO L225 Difference]: With dead ends: 4783 [2022-11-16 12:00:20,422 INFO L226 Difference]: Without dead ends: 4783 [2022-11-16 12:00:20,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:00:20,422 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:20,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2022-11-16 12:00:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2022-11-16 12:00:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4763. [2022-11-16 12:00:20,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4749 states have (on average 4.627711097073068) internal successors, (21977), 4762 states have internal predecessors, (21977), 0 states have call successors, (0), 0 states 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 12:00:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 21977 transitions. [2022-11-16 12:00:20,515 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 21977 transitions. Word has length 12 [2022-11-16 12:00:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:20,515 INFO L495 AbstractCegarLoop]: Abstraction has 4763 states and 21977 transitions. [2022-11-16 12:00:20,515 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 12:00:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 21977 transitions. [2022-11-16 12:00:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:00:20,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:20,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:20,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (67)] Ended with exit code 0 [2022-11-16 12:00:20,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:20,717 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:20,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1753552956, now seen corresponding path program 5 times [2022-11-16 12:00:20,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:20,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730811936] [2022-11-16 12:00:20,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:00:20,718 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 12:00:20,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:20,719 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:20,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (68)] Waiting until timeout for monitored process [2022-11-16 12:00:20,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:00:20,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:20,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:00:20,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:21,069 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:21,069 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 12:00:21,426 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 12:00:21,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:22,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:22,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730811936] [2022-11-16 12:00:22,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730811936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:22,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:22,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:00:22,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644689891] [2022-11-16 12:00:22,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:22,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:00:22,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:22,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:00:22,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:00:22,174 INFO L87 Difference]: Start difference. First operand 4763 states and 21977 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 12:00:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:22,503 INFO L93 Difference]: Finished difference Result 4793 states and 22107 transitions. [2022-11-16 12:00:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:00:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 12:00:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:22,519 INFO L225 Difference]: With dead ends: 4793 [2022-11-16 12:00:22,519 INFO L226 Difference]: Without dead ends: 4793 [2022-11-16 12:00:22,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:00:22,520 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:22,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-11-16 12:00:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2022-11-16 12:00:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 4753. [2022-11-16 12:00:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4739 states have (on average 4.629035661531969) internal successors, (21937), 4752 states have internal predecessors, (21937), 0 states have call successors, (0), 0 states 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 12:00:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 21937 transitions. [2022-11-16 12:00:22,612 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 21937 transitions. Word has length 12 [2022-11-16 12:00:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:22,612 INFO L495 AbstractCegarLoop]: Abstraction has 4753 states and 21937 transitions. [2022-11-16 12:00:22,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 12:00:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 21937 transitions. [2022-11-16 12:00:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:00:22,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:22,614 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-16 12:00:22,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (68)] Ended with exit code 0 [2022-11-16 12:00:22,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:22,814 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:00:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1510690024, now seen corresponding path program 4 times [2022-11-16 12:00:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:22,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519191918] [2022-11-16 12:00:22,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:00:22,815 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 12:00:22,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:22,816 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:00:22,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (69)] Waiting until timeout for monitored process [2022-11-16 12:00:23,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:00:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:00:23,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:23,231 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:00:23,231 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 12:00:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:23,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:26,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519191918] [2022-11-16 12:00:26,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519191918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:26,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:26,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:00:26,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735293453] [2022-11-16 12:00:26,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:26,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:00:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:00:26,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:00:26,233 INFO L87 Difference]: Start difference. First operand 4753 states and 21937 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 12:01:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:00,317 INFO L93 Difference]: Finished difference Result 8637 states and 36780 transitions. [2022-11-16 12:01:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:01:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 12:01:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:00,347 INFO L225 Difference]: With dead ends: 8637 [2022-11-16 12:01:00,347 INFO L226 Difference]: Without dead ends: 8637 [2022-11-16 12:01:00,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=566, Invalid=2626, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 12:01:00,348 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1356 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:00,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 537 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3676 Invalid, 0 Unknown, 0 Unchecked, 22.1s Time] [2022-11-16 12:01:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2022-11-16 12:01:00,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 5006. [2022-11-16 12:01:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 4992 states have (on average 4.4921875) internal successors, (22425), 5005 states have internal predecessors, (22425), 0 states have call successors, (0), 0 states 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 12:01:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 22425 transitions. [2022-11-16 12:01:00,469 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 22425 transitions. Word has length 13 [2022-11-16 12:01:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:00,470 INFO L495 AbstractCegarLoop]: Abstraction has 5006 states and 22425 transitions. [2022-11-16 12:01:00,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 12:01:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 22425 transitions. [2022-11-16 12:01:00,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:00,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:00,471 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:00,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (69)] Ended with exit code 0 [2022-11-16 12:01:00,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:00,672 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1083567239, now seen corresponding path program 1 times [2022-11-16 12:01:00,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:00,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260741570] [2022-11-16 12:01:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:00,673 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 12:01:00,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:00,674 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:00,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (70)] Waiting until timeout for monitored process [2022-11-16 12:01:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:00,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:01:00,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:01,051 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:01,051 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 12:01:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:01,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:03,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:03,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260741570] [2022-11-16 12:01:03,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260741570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:03,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:03,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:01:03,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927880933] [2022-11-16 12:01:03,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:03,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:01:03,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:03,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:01:03,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:01:03,580 INFO L87 Difference]: Start difference. First operand 5006 states and 22425 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 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 12:01:22,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:22,673 INFO L93 Difference]: Finished difference Result 7918 states and 33936 transitions. [2022-11-16 12:01:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:01:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 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 12:01:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:22,700 INFO L225 Difference]: With dead ends: 7918 [2022-11-16 12:01:22,700 INFO L226 Difference]: Without dead ends: 7918 [2022-11-16 12:01:22,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:01:22,701 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1135 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:22,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 257 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-11-16 12:01:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2022-11-16 12:01:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 4729. [2022-11-16 12:01:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 4715 states have (on average 4.403817603393425) internal successors, (20764), 4728 states have internal predecessors, (20764), 0 states have call successors, (0), 0 states 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 12:01:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 20764 transitions. [2022-11-16 12:01:22,816 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 20764 transitions. Word has length 13 [2022-11-16 12:01:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:22,816 INFO L495 AbstractCegarLoop]: Abstraction has 4729 states and 20764 transitions. [2022-11-16 12:01:22,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 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 12:01:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 20764 transitions. [2022-11-16 12:01:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:22,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:22,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:22,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (70)] Ended with exit code 0 [2022-11-16 12:01:23,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:23,018 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:23,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1204489856, now seen corresponding path program 4 times [2022-11-16 12:01:23,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:23,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916843533] [2022-11-16 12:01:23,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:01:23,019 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 12:01:23,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:23,020 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:23,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (71)] Waiting until timeout for monitored process [2022-11-16 12:01:23,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:01:23,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:23,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:01:23,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:23,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:23,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-16 12:01:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:24,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916843533] [2022-11-16 12:01:24,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916843533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:24,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:24,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:01:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166668701] [2022-11-16 12:01:24,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:01:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:01:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:01:24,082 INFO L87 Difference]: Start difference. First operand 4729 states and 20764 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:01:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:27,113 INFO L93 Difference]: Finished difference Result 7979 states and 33695 transitions. [2022-11-16 12:01:27,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:01:27,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:01:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:27,137 INFO L225 Difference]: With dead ends: 7979 [2022-11-16 12:01:27,137 INFO L226 Difference]: Without dead ends: 7979 [2022-11-16 12:01:27,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:01:27,137 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 699 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:27,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 65 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 12:01:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2022-11-16 12:01:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 4256. [2022-11-16 12:01:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4256 states, 4242 states have (on average 4.265676567656766) internal successors, (18095), 4255 states have internal predecessors, (18095), 0 states have call successors, (0), 0 states 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 12:01:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4256 states to 4256 states and 18095 transitions. [2022-11-16 12:01:27,239 INFO L78 Accepts]: Start accepts. Automaton has 4256 states and 18095 transitions. Word has length 13 [2022-11-16 12:01:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:27,239 INFO L495 AbstractCegarLoop]: Abstraction has 4256 states and 18095 transitions. [2022-11-16 12:01:27,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:01:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4256 states and 18095 transitions. [2022-11-16 12:01:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:27,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:27,241 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:27,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (71)] Ended with exit code 0 [2022-11-16 12:01:27,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:27,442 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1039508597, now seen corresponding path program 7 times [2022-11-16 12:01:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:27,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308167014] [2022-11-16 12:01:27,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:01:27,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:01:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:27,443 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:27,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (72)] Waiting until timeout for monitored process [2022-11-16 12:01:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:01:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:27,821 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:27,821 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 12:01:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:28,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:29,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:29,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308167014] [2022-11-16 12:01:29,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308167014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:29,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:29,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:01:29,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269531479] [2022-11-16 12:01:29,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:29,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:01:29,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:01:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:01:29,837 INFO L87 Difference]: Start difference. First operand 4256 states and 18095 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 12:01:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:36,919 INFO L93 Difference]: Finished difference Result 7484 states and 31413 transitions. [2022-11-16 12:01:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:01:36,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 12:01:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:36,945 INFO L225 Difference]: With dead ends: 7484 [2022-11-16 12:01:36,945 INFO L226 Difference]: Without dead ends: 7484 [2022-11-16 12:01:36,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:01:36,945 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:36,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 109 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 707 Invalid, 0 Unknown, 489 Unchecked, 4.9s Time] [2022-11-16 12:01:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-11-16 12:01:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 5428. [2022-11-16 12:01:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5414 states have (on average 4.459549316586627) internal successors, (24144), 5427 states have internal predecessors, (24144), 0 states have call successors, (0), 0 states 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 12:01:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 24144 transitions. [2022-11-16 12:01:37,065 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 24144 transitions. Word has length 13 [2022-11-16 12:01:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:37,065 INFO L495 AbstractCegarLoop]: Abstraction has 5428 states and 24144 transitions. [2022-11-16 12:01:37,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 12:01:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 24144 transitions. [2022-11-16 12:01:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:37,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:37,067 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:37,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (72)] Ended with exit code 0 [2022-11-16 12:01:37,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:37,270 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1039514177, now seen corresponding path program 8 times [2022-11-16 12:01:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:37,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571391819] [2022-11-16 12:01:37,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:01:37,271 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 12:01:37,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:37,272 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:37,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (73)] Waiting until timeout for monitored process [2022-11-16 12:01:37,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:01:37,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:01:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:37,687 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:37,687 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 12:01:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:38,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:39,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:39,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571391819] [2022-11-16 12:01:39,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571391819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:39,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:39,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:01:39,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735685558] [2022-11-16 12:01:39,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:39,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:01:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:39,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:01:39,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:01:39,768 INFO L87 Difference]: Start difference. First operand 5428 states and 24144 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 12:01:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:41,115 INFO L93 Difference]: Finished difference Result 5507 states and 24391 transitions. [2022-11-16 12:01:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:01:41,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 12:01:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:41,133 INFO L225 Difference]: With dead ends: 5507 [2022-11-16 12:01:41,133 INFO L226 Difference]: Without dead ends: 5507 [2022-11-16 12:01:41,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:01:41,134 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:41,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 77 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 95 Unchecked, 0.4s Time] [2022-11-16 12:01:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2022-11-16 12:01:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 5466. [2022-11-16 12:01:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5452 states have (on average 4.45487894350697) internal successors, (24288), 5465 states have internal predecessors, (24288), 0 states have call successors, (0), 0 states 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 12:01:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 24288 transitions. [2022-11-16 12:01:41,240 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 24288 transitions. Word has length 13 [2022-11-16 12:01:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:41,241 INFO L495 AbstractCegarLoop]: Abstraction has 5466 states and 24288 transitions. [2022-11-16 12:01:41,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 12:01:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 24288 transitions. [2022-11-16 12:01:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:41,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:41,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:41,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (73)] Ended with exit code 0 [2022-11-16 12:01:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:41,444 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash -93631349, now seen corresponding path program 1 times [2022-11-16 12:01:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:41,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602417956] [2022-11-16 12:01:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:41,444 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 12:01:41,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:41,445 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:41,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (74)] Waiting until timeout for monitored process [2022-11-16 12:01:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:41,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:01:41,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:41,844 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:41,845 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 12:01:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:01:42,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:01:42,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:42,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602417956] [2022-11-16 12:01:42,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602417956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:42,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:42,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:01:42,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123989588] [2022-11-16 12:01:42,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:42,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:01:42,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:01:42,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:42,763 INFO L87 Difference]: Start difference. First operand 5466 states and 24288 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:43,529 INFO L93 Difference]: Finished difference Result 6209 states and 27796 transitions. [2022-11-16 12:01:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:01:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:43,547 INFO L225 Difference]: With dead ends: 6209 [2022-11-16 12:01:43,547 INFO L226 Difference]: Without dead ends: 6209 [2022-11-16 12:01:43,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:01:43,548 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:43,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 115 Unchecked, 0.7s Time] [2022-11-16 12:01:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2022-11-16 12:01:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5475. [2022-11-16 12:01:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5461 states have (on average 4.45449551364219) internal successors, (24326), 5474 states have internal predecessors, (24326), 0 states have call successors, (0), 0 states 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 12:01:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 24326 transitions. [2022-11-16 12:01:43,651 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 24326 transitions. Word has length 13 [2022-11-16 12:01:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:43,651 INFO L495 AbstractCegarLoop]: Abstraction has 5475 states and 24326 transitions. [2022-11-16 12:01:43,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 24326 transitions. [2022-11-16 12:01:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:43,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:43,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:43,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (74)] Ended with exit code 0 [2022-11-16 12:01:43,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:43,854 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash -93625769, now seen corresponding path program 2 times [2022-11-16 12:01:43,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:43,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335302057] [2022-11-16 12:01:43,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:01:43,854 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 12:01:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:43,856 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:43,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (75)] Waiting until timeout for monitored process [2022-11-16 12:01:44,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:01:44,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:01:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:44,249 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:44,249 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 12:01:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:01:44,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:01:45,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:45,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335302057] [2022-11-16 12:01:45,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335302057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:45,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:45,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:01:45,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726170234] [2022-11-16 12:01:45,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:45,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:01:45,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:01:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:45,233 INFO L87 Difference]: Start difference. First operand 5475 states and 24326 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:45,420 INFO L93 Difference]: Finished difference Result 5599 states and 24853 transitions. [2022-11-16 12:01:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:01:45,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:45,438 INFO L225 Difference]: With dead ends: 5599 [2022-11-16 12:01:45,438 INFO L226 Difference]: Without dead ends: 5599 [2022-11-16 12:01:45,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:01:45,438 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:45,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 12:01:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2022-11-16 12:01:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 5490. [2022-11-16 12:01:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5490 states, 5476 states have (on average 4.450511322132944) internal successors, (24371), 5489 states have internal predecessors, (24371), 0 states have call successors, (0), 0 states 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 12:01:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5490 states to 5490 states and 24371 transitions. [2022-11-16 12:01:45,588 INFO L78 Accepts]: Start accepts. Automaton has 5490 states and 24371 transitions. Word has length 13 [2022-11-16 12:01:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:45,588 INFO L495 AbstractCegarLoop]: Abstraction has 5490 states and 24371 transitions. [2022-11-16 12:01:45,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5490 states and 24371 transitions. [2022-11-16 12:01:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:45,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:45,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:45,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (75)] Ended with exit code 0 [2022-11-16 12:01:45,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:45,791 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash -88528439, now seen corresponding path program 3 times [2022-11-16 12:01:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:45,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404386222] [2022-11-16 12:01:45,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:01:45,792 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 12:01:45,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:45,792 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:45,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (76)] Waiting until timeout for monitored process [2022-11-16 12:01:46,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:01:46,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:01:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:46,177 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:46,177 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 12:01:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:01:46,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:01:47,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:47,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404386222] [2022-11-16 12:01:47,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404386222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:47,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:47,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:01:47,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126226308] [2022-11-16 12:01:47,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:47,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:01:47,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:01:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:47,167 INFO L87 Difference]: Start difference. First operand 5490 states and 24371 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:47,754 INFO L93 Difference]: Finished difference Result 5552 states and 24628 transitions. [2022-11-16 12:01:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:01:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:47,772 INFO L225 Difference]: With dead ends: 5552 [2022-11-16 12:01:47,772 INFO L226 Difference]: Without dead ends: 5552 [2022-11-16 12:01:47,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:01:47,773 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:47,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-11-16 12:01:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2022-11-16 12:01:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 5494. [2022-11-16 12:01:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5480 states have (on average 4.449452554744526) internal successors, (24383), 5493 states have internal predecessors, (24383), 0 states have call successors, (0), 0 states 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 12:01:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 24383 transitions. [2022-11-16 12:01:47,878 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 24383 transitions. Word has length 13 [2022-11-16 12:01:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:47,878 INFO L495 AbstractCegarLoop]: Abstraction has 5494 states and 24383 transitions. [2022-11-16 12:01:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 24383 transitions. [2022-11-16 12:01:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:47,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:47,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:47,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (76)] Ended with exit code 0 [2022-11-16 12:01:48,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:48,081 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash -461545503, now seen corresponding path program 4 times [2022-11-16 12:01:48,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:48,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549623350] [2022-11-16 12:01:48,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:01:48,082 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 12:01:48,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:48,082 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:48,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (77)] Waiting until timeout for monitored process [2022-11-16 12:01:48,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:01:48,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:48,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:01:48,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:48,452 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:48,452 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 12:01:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:01:48,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:01:49,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:49,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549623350] [2022-11-16 12:01:49,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549623350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:49,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:49,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:01:49,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332430701] [2022-11-16 12:01:49,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:01:49,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:01:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:49,396 INFO L87 Difference]: Start difference. First operand 5494 states and 24383 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:49,919 INFO L93 Difference]: Finished difference Result 5614 states and 24935 transitions. [2022-11-16 12:01:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:01:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:49,937 INFO L225 Difference]: With dead ends: 5614 [2022-11-16 12:01:49,937 INFO L226 Difference]: Without dead ends: 5614 [2022-11-16 12:01:49,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:01:49,938 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:49,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-16 12:01:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2022-11-16 12:01:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 5495. [2022-11-16 12:01:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5495 states, 5481 states have (on average 4.449188104360518) internal successors, (24386), 5494 states have internal predecessors, (24386), 0 states have call successors, (0), 0 states 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 12:01:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5495 states to 5495 states and 24386 transitions. [2022-11-16 12:01:50,044 INFO L78 Accepts]: Start accepts. Automaton has 5495 states and 24386 transitions. Word has length 13 [2022-11-16 12:01:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:50,044 INFO L495 AbstractCegarLoop]: Abstraction has 5495 states and 24386 transitions. [2022-11-16 12:01:50,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5495 states and 24386 transitions. [2022-11-16 12:01:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:50,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:50,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:50,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (77)] Ended with exit code 0 [2022-11-16 12:01:50,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:50,247 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash -461539923, now seen corresponding path program 5 times [2022-11-16 12:01:50,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:50,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704949164] [2022-11-16 12:01:50,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:01:50,247 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 12:01:50,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:50,248 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:50,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (78)] Waiting until timeout for monitored process [2022-11-16 12:01:50,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:01:50,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:01:50,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:50,707 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:50,708 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 12:01:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:51,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:51,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:51,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704949164] [2022-11-16 12:01:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704949164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:51,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:51,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:01:51,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208174299] [2022-11-16 12:01:51,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:51,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:01:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:01:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:01:51,866 INFO L87 Difference]: Start difference. First operand 5495 states and 24386 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 12:01:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:52,592 INFO L93 Difference]: Finished difference Result 5915 states and 26344 transitions. [2022-11-16 12:01:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:01:52,593 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 12:01:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:52,610 INFO L225 Difference]: With dead ends: 5915 [2022-11-16 12:01:52,610 INFO L226 Difference]: Without dead ends: 5915 [2022-11-16 12:01:52,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:01:52,611 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:52,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 47 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 85 Unchecked, 0.6s Time] [2022-11-16 12:01:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2022-11-16 12:01:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5496. [2022-11-16 12:01:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5482 states have (on average 4.448923750456038) internal successors, (24389), 5495 states have internal predecessors, (24389), 0 states have call successors, (0), 0 states 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 12:01:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24389 transitions. [2022-11-16 12:01:52,715 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24389 transitions. Word has length 13 [2022-11-16 12:01:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:52,715 INFO L495 AbstractCegarLoop]: Abstraction has 5496 states and 24389 transitions. [2022-11-16 12:01:52,715 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 12:01:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24389 transitions. [2022-11-16 12:01:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:52,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:52,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:52,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (78)] Ended with exit code 0 [2022-11-16 12:01:52,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:52,917 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:52,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash -461063763, now seen corresponding path program 6 times [2022-11-16 12:01:52,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:52,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499843450] [2022-11-16 12:01:52,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:01:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:01:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:52,919 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:52,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (79)] Waiting until timeout for monitored process [2022-11-16 12:01:53,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 12:01:53,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:53,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:01:53,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:53,346 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:53,347 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 12:01:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:01:53,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:01:54,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:54,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499843450] [2022-11-16 12:01:54,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499843450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:54,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:54,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:01:54,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435857507] [2022-11-16 12:01:54,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:54,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:01:54,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:54,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:01:54,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:54,305 INFO L87 Difference]: Start difference. First operand 5496 states and 24389 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:54,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:54,968 INFO L93 Difference]: Finished difference Result 6947 states and 31570 transitions. [2022-11-16 12:01:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:01:54,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:54,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:54,991 INFO L225 Difference]: With dead ends: 6947 [2022-11-16 12:01:54,991 INFO L226 Difference]: Without dead ends: 6947 [2022-11-16 12:01:54,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:01:54,991 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:54,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 63 Unchecked, 0.6s Time] [2022-11-16 12:01:54,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6947 states. [2022-11-16 12:01:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6947 to 6216. [2022-11-16 12:01:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6216 states, 6202 states have (on average 4.529184134150274) internal successors, (28090), 6215 states have internal predecessors, (28090), 0 states have call successors, (0), 0 states 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 12:01:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 28090 transitions. [2022-11-16 12:01:55,118 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 28090 transitions. Word has length 13 [2022-11-16 12:01:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:55,118 INFO L495 AbstractCegarLoop]: Abstraction has 6216 states and 28090 transitions. [2022-11-16 12:01:55,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 28090 transitions. [2022-11-16 12:01:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:55,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:55,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:55,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (79)] Ended with exit code 0 [2022-11-16 12:01:55,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:55,321 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash -460905663, now seen corresponding path program 7 times [2022-11-16 12:01:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:55,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661559996] [2022-11-16 12:01:55,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:01:55,321 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 12:01:55,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:55,322 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:55,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (80)] Waiting until timeout for monitored process [2022-11-16 12:01:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:55,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:01:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:55,690 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:55,694 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 12:01:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:01:56,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:01:56,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:56,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661559996] [2022-11-16 12:01:56,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661559996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:56,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:56,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:01:56,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790473439] [2022-11-16 12:01:56,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:01:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:01:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:56,632 INFO L87 Difference]: Start difference. First operand 6216 states and 28090 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:57,330 INFO L93 Difference]: Finished difference Result 6770 states and 30784 transitions. [2022-11-16 12:01:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:01:57,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:57,352 INFO L225 Difference]: With dead ends: 6770 [2022-11-16 12:01:57,352 INFO L226 Difference]: Without dead ends: 6770 [2022-11-16 12:01:57,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:01:57,353 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:57,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 27 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 71 Unchecked, 0.6s Time] [2022-11-16 12:01:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2022-11-16 12:01:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6216. [2022-11-16 12:01:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6216 states, 6202 states have (on average 4.529022895840051) internal successors, (28089), 6215 states have internal predecessors, (28089), 0 states have call successors, (0), 0 states 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 12:01:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 28089 transitions. [2022-11-16 12:01:57,525 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 28089 transitions. Word has length 13 [2022-11-16 12:01:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:57,525 INFO L495 AbstractCegarLoop]: Abstraction has 6216 states and 28089 transitions. [2022-11-16 12:01:57,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 28089 transitions. [2022-11-16 12:01:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:57,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:57,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:57,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (80)] Ended with exit code 0 [2022-11-16 12:01:57,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:57,728 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash -302894013, now seen corresponding path program 8 times [2022-11-16 12:01:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049268329] [2022-11-16 12:01:57,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:01:57,729 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 12:01:57,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:57,729 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:57,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (81)] Waiting until timeout for monitored process [2022-11-16 12:01:57,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:01:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:01:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:58,126 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:01:58,126 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 12:01:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:01:58,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:01:59,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:01:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049268329] [2022-11-16 12:01:59,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049268329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:59,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:59,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:01:59,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337057411] [2022-11-16 12:01:59,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:59,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:01:59,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:01:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:01:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:59,089 INFO L87 Difference]: Start difference. First operand 6216 states and 28089 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:59,586 INFO L93 Difference]: Finished difference Result 6295 states and 28407 transitions. [2022-11-16 12:01:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:01:59,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:59,607 INFO L225 Difference]: With dead ends: 6295 [2022-11-16 12:01:59,607 INFO L226 Difference]: Without dead ends: 6295 [2022-11-16 12:01:59,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:01:59,608 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:59,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-11-16 12:01:59,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2022-11-16 12:01:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 6217. [2022-11-16 12:01:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6217 states, 6203 states have (on average 4.528937610833467) internal successors, (28093), 6216 states have internal predecessors, (28093), 0 states have call successors, (0), 0 states 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 12:01:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6217 states to 6217 states and 28093 transitions. [2022-11-16 12:01:59,728 INFO L78 Accepts]: Start accepts. Automaton has 6217 states and 28093 transitions. Word has length 13 [2022-11-16 12:01:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:59,728 INFO L495 AbstractCegarLoop]: Abstraction has 6217 states and 28093 transitions. [2022-11-16 12:01:59,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:01:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6217 states and 28093 transitions. [2022-11-16 12:01:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:01:59,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:59,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:59,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (81)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:59,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:59,931 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:01:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash -303017021, now seen corresponding path program 1 times [2022-11-16 12:01:59,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:01:59,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798342813] [2022-11-16 12:01:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:59,932 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 12:01:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:01:59,938 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:01:59,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (82)] Waiting until timeout for monitored process [2022-11-16 12:02:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:00,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:00,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:00,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:00,358 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 12:02:00,709 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 12:02:00,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:01,297 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 12:02:01,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:01,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798342813] [2022-11-16 12:02:01,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798342813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:01,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:01,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011356666] [2022-11-16 12:02:01,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:01,298 INFO L87 Difference]: Start difference. First operand 6217 states and 28093 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:01,873 INFO L93 Difference]: Finished difference Result 6422 states and 29205 transitions. [2022-11-16 12:02:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:01,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:01,895 INFO L225 Difference]: With dead ends: 6422 [2022-11-16 12:02:01,895 INFO L226 Difference]: Without dead ends: 6422 [2022-11-16 12:02:01,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:01,895 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:01,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-11-16 12:02:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6422 states. [2022-11-16 12:02:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6422 to 6218. [2022-11-16 12:02:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6218 states, 6204 states have (on average 4.529013539651838) internal successors, (28098), 6217 states have internal predecessors, (28098), 0 states have call successors, (0), 0 states 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 12:02:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6218 states to 6218 states and 28098 transitions. [2022-11-16 12:02:02,026 INFO L78 Accepts]: Start accepts. Automaton has 6218 states and 28098 transitions. Word has length 13 [2022-11-16 12:02:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:02,026 INFO L495 AbstractCegarLoop]: Abstraction has 6218 states and 28098 transitions. [2022-11-16 12:02:02,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6218 states and 28098 transitions. [2022-11-16 12:02:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:02,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:02,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:02,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (82)] Ended with exit code 0 [2022-11-16 12:02:02,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:02,229 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash -302873553, now seen corresponding path program 9 times [2022-11-16 12:02:02,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:02,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41691786] [2022-11-16 12:02:02,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:02:02,229 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 12:02:02,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:02,230 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:02,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (83)] Waiting until timeout for monitored process [2022-11-16 12:02:02,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:02:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:02,630 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:02,630 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 12:02:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:02:02,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:02:03,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:03,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41691786] [2022-11-16 12:02:03,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41691786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:03,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:03,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453596503] [2022-11-16 12:02:03,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:03,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:03,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:03,574 INFO L87 Difference]: Start difference. First operand 6218 states and 28098 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:04,107 INFO L93 Difference]: Finished difference Result 6290 states and 28395 transitions. [2022-11-16 12:02:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:04,126 INFO L225 Difference]: With dead ends: 6290 [2022-11-16 12:02:04,126 INFO L226 Difference]: Without dead ends: 6290 [2022-11-16 12:02:04,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:04,127 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:04,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2022-11-16 12:02:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6290 states. [2022-11-16 12:02:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6290 to 6184. [2022-11-16 12:02:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6170 states have (on average 4.526418152350081) internal successors, (27928), 6183 states have internal predecessors, (27928), 0 states have call successors, (0), 0 states 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 12:02:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 27928 transitions. [2022-11-16 12:02:04,282 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 27928 transitions. Word has length 13 [2022-11-16 12:02:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:04,282 INFO L495 AbstractCegarLoop]: Abstraction has 6184 states and 27928 transitions. [2022-11-16 12:02:04,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 27928 transitions. [2022-11-16 12:02:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:04,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:04,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:04,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (83)] Ended with exit code 0 [2022-11-16 12:02:04,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:04,484 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash -302877521, now seen corresponding path program 2 times [2022-11-16 12:02:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:04,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585992885] [2022-11-16 12:02:04,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:02:04,485 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 12:02:04,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:04,486 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:04,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (84)] Waiting until timeout for monitored process [2022-11-16 12:02:04,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:04,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:04,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:04,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:04,888 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:04,888 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 12:02:05,193 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 12:02:05,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:05,788 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 12:02:05,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:05,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585992885] [2022-11-16 12:02:05,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585992885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:05,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:05,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:05,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25573225] [2022-11-16 12:02:05,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:05,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:05,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:05,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:05,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:05,790 INFO L87 Difference]: Start difference. First operand 6184 states and 27928 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:06,419 INFO L93 Difference]: Finished difference Result 7178 states and 33057 transitions. [2022-11-16 12:02:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:06,453 INFO L225 Difference]: With dead ends: 7178 [2022-11-16 12:02:06,453 INFO L226 Difference]: Without dead ends: 7178 [2022-11-16 12:02:06,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:06,454 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:06,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 26 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-11-16 12:02:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2022-11-16 12:02:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 6208. [2022-11-16 12:02:06,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6208 states, 6194 states have (on average 4.527445915402002) internal successors, (28043), 6207 states have internal predecessors, (28043), 0 states have call successors, (0), 0 states 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 12:02:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6208 states to 6208 states and 28043 transitions. [2022-11-16 12:02:06,604 INFO L78 Accepts]: Start accepts. Automaton has 6208 states and 28043 transitions. Word has length 13 [2022-11-16 12:02:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:06,605 INFO L495 AbstractCegarLoop]: Abstraction has 6208 states and 28043 transitions. [2022-11-16 12:02:06,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6208 states and 28043 transitions. [2022-11-16 12:02:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:06,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:06,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:06,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (84)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:06,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:06,821 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash -302065631, now seen corresponding path program 3 times [2022-11-16 12:02:06,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:06,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924493135] [2022-11-16 12:02:06,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:02:06,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:02:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:06,822 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:06,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (85)] Waiting until timeout for monitored process [2022-11-16 12:02:07,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:02:07,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:07,281 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:07,281 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 12:02:07,611 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 12:02:07,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:08,184 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 12:02:08,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:08,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924493135] [2022-11-16 12:02:08,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924493135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:08,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:08,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:08,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887825832] [2022-11-16 12:02:08,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:08,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:08,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:08,185 INFO L87 Difference]: Start difference. First operand 6208 states and 28043 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:08,701 INFO L93 Difference]: Finished difference Result 6377 states and 28939 transitions. [2022-11-16 12:02:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:08,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:08,721 INFO L225 Difference]: With dead ends: 6377 [2022-11-16 12:02:08,721 INFO L226 Difference]: Without dead ends: 6377 [2022-11-16 12:02:08,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:08,722 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:08,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-16 12:02:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2022-11-16 12:02:08,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 6265. [2022-11-16 12:02:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6265 states, 6251 states have (on average 4.539913613821788) internal successors, (28379), 6264 states have internal predecessors, (28379), 0 states have call successors, (0), 0 states 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 12:02:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6265 states to 6265 states and 28379 transitions. [2022-11-16 12:02:08,839 INFO L78 Accepts]: Start accepts. Automaton has 6265 states and 28379 transitions. Word has length 13 [2022-11-16 12:02:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:08,839 INFO L495 AbstractCegarLoop]: Abstraction has 6265 states and 28379 transitions. [2022-11-16 12:02:08,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6265 states and 28379 transitions. [2022-11-16 12:02:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:08,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:08,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:08,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (85)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:09,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:09,041 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash -396447817, now seen corresponding path program 10 times [2022-11-16 12:02:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:09,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074895753] [2022-11-16 12:02:09,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:02:09,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:02:09,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:09,043 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:09,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (86)] Waiting until timeout for monitored process [2022-11-16 12:02:09,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:02:09,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:09,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:09,428 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:09,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:02:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:02:09,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:02:10,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:10,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074895753] [2022-11-16 12:02:10,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074895753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:10,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:10,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:10,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635754513] [2022-11-16 12:02:10,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:10,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:10,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:10,310 INFO L87 Difference]: Start difference. First operand 6265 states and 28379 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:10,864 INFO L93 Difference]: Finished difference Result 6686 states and 30372 transitions. [2022-11-16 12:02:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:10,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:10,885 INFO L225 Difference]: With dead ends: 6686 [2022-11-16 12:02:10,885 INFO L226 Difference]: Without dead ends: 6686 [2022-11-16 12:02:10,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:10,886 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:10,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-11-16 12:02:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6686 states. [2022-11-16 12:02:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6686 to 6265. [2022-11-16 12:02:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6265 states, 6251 states have (on average 4.539913613821788) internal successors, (28379), 6264 states have internal predecessors, (28379), 0 states have call successors, (0), 0 states 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 12:02:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6265 states to 6265 states and 28379 transitions. [2022-11-16 12:02:11,049 INFO L78 Accepts]: Start accepts. Automaton has 6265 states and 28379 transitions. Word has length 13 [2022-11-16 12:02:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:11,049 INFO L495 AbstractCegarLoop]: Abstraction has 6265 states and 28379 transitions. [2022-11-16 12:02:11,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6265 states and 28379 transitions. [2022-11-16 12:02:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:11,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:11,052 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:11,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (86)] Ended with exit code 0 [2022-11-16 12:02:11,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:11,253 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:11,254 INFO L85 PathProgramCache]: Analyzing trace with hash -396447135, now seen corresponding path program 8 times [2022-11-16 12:02:11,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:11,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082479817] [2022-11-16 12:02:11,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:02:11,254 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 12:02:11,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:11,255 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:11,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (87)] Waiting until timeout for monitored process [2022-11-16 12:02:11,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:11,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:02:11,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:11,664 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:11,664 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 12:02:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:12,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:13,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082479817] [2022-11-16 12:02:13,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082479817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:13,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:13,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:02:13,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762986967] [2022-11-16 12:02:13,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:13,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:13,090 INFO L87 Difference]: Start difference. First operand 6265 states and 28379 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:02:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:15,195 INFO L93 Difference]: Finished difference Result 6396 states and 28863 transitions. [2022-11-16 12:02:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:02:15,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:02:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:15,219 INFO L225 Difference]: With dead ends: 6396 [2022-11-16 12:02:15,219 INFO L226 Difference]: Without dead ends: 6396 [2022-11-16 12:02:15,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:02:15,220 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:15,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 210 Unchecked, 1.0s Time] [2022-11-16 12:02:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2022-11-16 12:02:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 6370. [2022-11-16 12:02:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6356 states have (on average 4.529263687853996) internal successors, (28788), 6369 states have internal predecessors, (28788), 0 states have call successors, (0), 0 states 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 12:02:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 28788 transitions. [2022-11-16 12:02:15,427 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 28788 transitions. Word has length 13 [2022-11-16 12:02:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:15,427 INFO L495 AbstractCegarLoop]: Abstraction has 6370 states and 28788 transitions. [2022-11-16 12:02:15,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:02:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 28788 transitions. [2022-11-16 12:02:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:15,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:15,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:15,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (87)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:15,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:15,631 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash -390667867, now seen corresponding path program 11 times [2022-11-16 12:02:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:15,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338464934] [2022-11-16 12:02:15,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:02:15,632 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 12:02:15,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:15,633 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:15,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (88)] Waiting until timeout for monitored process [2022-11-16 12:02:15,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:15,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:15,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:02:15,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:16,096 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:16,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:02:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:02:16,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:02:17,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:17,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338464934] [2022-11-16 12:02:17,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338464934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:17,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:17,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:02:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980444598] [2022-11-16 12:02:17,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:17,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:02:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:02:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:02:17,254 INFO L87 Difference]: Start difference. First operand 6370 states and 28788 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 12:02:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:18,122 INFO L93 Difference]: Finished difference Result 6966 states and 31680 transitions. [2022-11-16 12:02:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:02:18,123 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 12:02:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:18,148 INFO L225 Difference]: With dead ends: 6966 [2022-11-16 12:02:18,148 INFO L226 Difference]: Without dead ends: 6966 [2022-11-16 12:02:18,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:02:18,148 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:18,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 37 Unchecked, 0.8s Time] [2022-11-16 12:02:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6966 states. [2022-11-16 12:02:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6966 to 6370. [2022-11-16 12:02:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6356 states have (on average 4.529263687853996) internal successors, (28788), 6369 states have internal predecessors, (28788), 0 states have call successors, (0), 0 states 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 12:02:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 28788 transitions. [2022-11-16 12:02:18,289 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 28788 transitions. Word has length 13 [2022-11-16 12:02:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:18,289 INFO L495 AbstractCegarLoop]: Abstraction has 6370 states and 28788 transitions. [2022-11-16 12:02:18,290 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 12:02:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 28788 transitions. [2022-11-16 12:02:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:18,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:18,292 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:18,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (88)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:18,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:18,493 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash -390033421, now seen corresponding path program 5 times [2022-11-16 12:02:18,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:18,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448958346] [2022-11-16 12:02:18,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:02:18,493 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 12:02:18,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:18,494 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:18,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (89)] Waiting until timeout for monitored process [2022-11-16 12:02:18,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:18,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:18,894 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:18,894 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 12:02:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:19,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:19,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:02:19,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:02:19,455 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:20,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:20,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448958346] [2022-11-16 12:02:20,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448958346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:20,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:20,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:02:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542322090] [2022-11-16 12:02:20,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:20,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:02:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:02:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:02:20,621 INFO L87 Difference]: Start difference. First operand 6370 states and 28788 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 12:02:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:24,179 INFO L93 Difference]: Finished difference Result 6784 states and 29972 transitions. [2022-11-16 12:02:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:02:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 12:02:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:24,206 INFO L225 Difference]: With dead ends: 6784 [2022-11-16 12:02:24,206 INFO L226 Difference]: Without dead ends: 6784 [2022-11-16 12:02:24,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:02:24,207 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:24,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 57 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 301 Invalid, 0 Unknown, 25 Unchecked, 2.1s Time] [2022-11-16 12:02:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6784 states. [2022-11-16 12:02:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6784 to 6380. [2022-11-16 12:02:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6380 states, 6366 states have (on average 4.530160226201697) internal successors, (28839), 6379 states have internal predecessors, (28839), 0 states have call successors, (0), 0 states 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 12:02:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6380 states to 6380 states and 28839 transitions. [2022-11-16 12:02:24,404 INFO L78 Accepts]: Start accepts. Automaton has 6380 states and 28839 transitions. Word has length 13 [2022-11-16 12:02:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:24,405 INFO L495 AbstractCegarLoop]: Abstraction has 6380 states and 28839 transitions. [2022-11-16 12:02:24,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 12:02:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 6380 states and 28839 transitions. [2022-11-16 12:02:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:24,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:24,408 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:24,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (89)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:24,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:24,612 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash -390018045, now seen corresponding path program 9 times [2022-11-16 12:02:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:24,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769556971] [2022-11-16 12:02:24,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:02:24,612 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 12:02:24,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:24,613 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:24,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (90)] Waiting until timeout for monitored process [2022-11-16 12:02:24,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:02:24,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:24,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:02:24,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:25,048 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:25,049 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 12:02:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:25,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:26,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:26,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769556971] [2022-11-16 12:02:26,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769556971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:26,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:26,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:02:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304769097] [2022-11-16 12:02:26,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:26,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:26,615 INFO L87 Difference]: Start difference. First operand 6380 states and 28839 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:02:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:28,847 INFO L93 Difference]: Finished difference Result 6909 states and 30818 transitions. [2022-11-16 12:02:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:02:28,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:02:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:28,871 INFO L225 Difference]: With dead ends: 6909 [2022-11-16 12:02:28,871 INFO L226 Difference]: Without dead ends: 6909 [2022-11-16 12:02:28,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:02:28,872 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:28,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 33 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 215 Unchecked, 1.4s Time] [2022-11-16 12:02:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6909 states. [2022-11-16 12:02:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6909 to 6539. [2022-11-16 12:02:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6525 states have (on average 4.520459770114942) internal successors, (29496), 6538 states have internal predecessors, (29496), 0 states have call successors, (0), 0 states 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 12:02:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 29496 transitions. [2022-11-16 12:02:29,023 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 29496 transitions. Word has length 13 [2022-11-16 12:02:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:29,023 INFO L495 AbstractCegarLoop]: Abstraction has 6539 states and 29496 transitions. [2022-11-16 12:02:29,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 12:02:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 29496 transitions. [2022-11-16 12:02:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:29,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:29,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:29,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (90)] Ended with exit code 0 [2022-11-16 12:02:29,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:29,226 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash 207983669, now seen corresponding path program 4 times [2022-11-16 12:02:29,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:29,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851791526] [2022-11-16 12:02:29,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:02:29,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:02:29,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:29,228 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:29,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (91)] Waiting until timeout for monitored process [2022-11-16 12:02:29,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:02:29,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:29,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:29,612 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:29,613 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 12:02:29,988 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 12:02:29,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:30,624 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 12:02:30,625 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851791526] [2022-11-16 12:02:30,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851791526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:30,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:30,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:30,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874153040] [2022-11-16 12:02:30,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:30,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:30,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:30,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:30,626 INFO L87 Difference]: Start difference. First operand 6539 states and 29496 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:31,104 INFO L93 Difference]: Finished difference Result 7038 states and 32065 transitions. [2022-11-16 12:02:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:02:31,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:31,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:31,128 INFO L225 Difference]: With dead ends: 7038 [2022-11-16 12:02:31,128 INFO L226 Difference]: Without dead ends: 7038 [2022-11-16 12:02:31,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:31,128 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:31,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-11-16 12:02:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2022-11-16 12:02:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 6559. [2022-11-16 12:02:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 6545 states have (on average 4.519633307868602) internal successors, (29581), 6558 states have internal predecessors, (29581), 0 states have call successors, (0), 0 states 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 12:02:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 29581 transitions. [2022-11-16 12:02:31,269 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 29581 transitions. Word has length 13 [2022-11-16 12:02:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:31,269 INFO L495 AbstractCegarLoop]: Abstraction has 6559 states and 29581 transitions. [2022-11-16 12:02:31,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 29581 transitions. [2022-11-16 12:02:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:31,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:31,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:31,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (91)] Ended with exit code 0 [2022-11-16 12:02:31,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:31,488 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash 207984599, now seen corresponding path program 5 times [2022-11-16 12:02:31,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:31,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755448838] [2022-11-16 12:02:31,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:02:31,489 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 12:02:31,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:31,490 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:31,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (92)] Waiting until timeout for monitored process [2022-11-16 12:02:31,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:31,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:02:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:31,929 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:31,929 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 12:02:32,381 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 12:02:32,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:33,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:33,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755448838] [2022-11-16 12:02:33,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755448838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:33,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:33,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:02:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300895379] [2022-11-16 12:02:33,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:33,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:02:33,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:33,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:02:33,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:02:33,188 INFO L87 Difference]: Start difference. First operand 6559 states and 29581 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 12:02:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:33,917 INFO L93 Difference]: Finished difference Result 7056 states and 31952 transitions. [2022-11-16 12:02:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:02:33,919 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 12:02:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:33,942 INFO L225 Difference]: With dead ends: 7056 [2022-11-16 12:02:33,942 INFO L226 Difference]: Without dead ends: 7056 [2022-11-16 12:02:33,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:02:33,942 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:33,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 38 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 112 Unchecked, 0.6s Time] [2022-11-16 12:02:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7056 states. [2022-11-16 12:02:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7056 to 6560. [2022-11-16 12:02:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6560 states, 6546 states have (on average 4.519706691109074) internal successors, (29586), 6559 states have internal predecessors, (29586), 0 states have call successors, (0), 0 states 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 12:02:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 29586 transitions. [2022-11-16 12:02:34,136 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 29586 transitions. Word has length 13 [2022-11-16 12:02:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:34,136 INFO L495 AbstractCegarLoop]: Abstraction has 6560 states and 29586 transitions. [2022-11-16 12:02:34,136 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 12:02:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 29586 transitions. [2022-11-16 12:02:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:34,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:34,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:34,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (92)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:34,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:34,339 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 212308169, now seen corresponding path program 6 times [2022-11-16 12:02:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:34,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135668217] [2022-11-16 12:02:34,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:02:34,340 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 12:02:34,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:34,341 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:34,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (93)] Waiting until timeout for monitored process [2022-11-16 12:02:34,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 12:02:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:34,765 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:34,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:02:35,097 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 12:02:35,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:35,753 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 12:02:35,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:35,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135668217] [2022-11-16 12:02:35,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135668217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:35,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:35,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:35,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741764938] [2022-11-16 12:02:35,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:35,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:35,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:35,755 INFO L87 Difference]: Start difference. First operand 6560 states and 29586 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:36,689 INFO L93 Difference]: Finished difference Result 7614 states and 34589 transitions. [2022-11-16 12:02:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:36,714 INFO L225 Difference]: With dead ends: 7614 [2022-11-16 12:02:36,714 INFO L226 Difference]: Without dead ends: 7614 [2022-11-16 12:02:36,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:36,715 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:36,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 127 Unchecked, 0.8s Time] [2022-11-16 12:02:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7614 states. [2022-11-16 12:02:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7614 to 6590. [2022-11-16 12:02:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6590 states, 6576 states have (on average 4.518704379562044) internal successors, (29715), 6589 states have internal predecessors, (29715), 0 states have call successors, (0), 0 states 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 12:02:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 29715 transitions. [2022-11-16 12:02:36,953 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 29715 transitions. Word has length 13 [2022-11-16 12:02:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:36,953 INFO L495 AbstractCegarLoop]: Abstraction has 6590 states and 29715 transitions. [2022-11-16 12:02:36,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 29715 transitions. [2022-11-16 12:02:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:36,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:36,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:36,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (93)] Ended with exit code 0 [2022-11-16 12:02:37,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:37,157 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash 212460937, now seen corresponding path program 12 times [2022-11-16 12:02:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:37,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177106217] [2022-11-16 12:02:37,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:02:37,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:02:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:37,159 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:37,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (94)] Waiting until timeout for monitored process [2022-11-16 12:02:37,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 12:02:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:37,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:37,630 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:37,631 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 12:02:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:02:37,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:02:38,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177106217] [2022-11-16 12:02:38,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177106217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:38,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:38,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:38,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184220584] [2022-11-16 12:02:38,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:38,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:38,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:38,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:38,668 INFO L87 Difference]: Start difference. First operand 6590 states and 29715 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:39,331 INFO L93 Difference]: Finished difference Result 6847 states and 30863 transitions. [2022-11-16 12:02:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:02:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:39,355 INFO L225 Difference]: With dead ends: 6847 [2022-11-16 12:02:39,355 INFO L226 Difference]: Without dead ends: 6847 [2022-11-16 12:02:39,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:39,355 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:39,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-16 12:02:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2022-11-16 12:02:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 6641. [2022-11-16 12:02:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6641 states, 6627 states have (on average 4.521502942507922) internal successors, (29964), 6640 states have internal predecessors, (29964), 0 states have call successors, (0), 0 states 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 12:02:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 29964 transitions. [2022-11-16 12:02:39,491 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 29964 transitions. Word has length 13 [2022-11-16 12:02:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:39,491 INFO L495 AbstractCegarLoop]: Abstraction has 6641 states and 29964 transitions. [2022-11-16 12:02:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 29964 transitions. [2022-11-16 12:02:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:39,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:39,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:39,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (94)] Ended with exit code 0 [2022-11-16 12:02:39,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:39,695 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash 212477429, now seen corresponding path program 7 times [2022-11-16 12:02:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:39,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106507746] [2022-11-16 12:02:39,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:02:39,696 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 12:02:39,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:39,697 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:39,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (95)] Waiting until timeout for monitored process [2022-11-16 12:02:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:40,120 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:40,120 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 12:02:40,473 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 12:02:40,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:41,057 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 12:02:41,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:41,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106507746] [2022-11-16 12:02:41,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106507746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:41,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:41,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:41,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932534973] [2022-11-16 12:02:41,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:41,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:41,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:41,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:41,059 INFO L87 Difference]: Start difference. First operand 6641 states and 29964 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:41,863 INFO L93 Difference]: Finished difference Result 7341 states and 33292 transitions. [2022-11-16 12:02:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:02:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:41,886 INFO L225 Difference]: With dead ends: 7341 [2022-11-16 12:02:41,886 INFO L226 Difference]: Without dead ends: 7341 [2022-11-16 12:02:41,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:41,887 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:41,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2022-11-16 12:02:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2022-11-16 12:02:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 6642. [2022-11-16 12:02:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6642 states, 6628 states have (on average 4.521273385636693) internal successors, (29967), 6641 states have internal predecessors, (29967), 0 states have call successors, (0), 0 states 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 12:02:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6642 states to 6642 states and 29967 transitions. [2022-11-16 12:02:42,023 INFO L78 Accepts]: Start accepts. Automaton has 6642 states and 29967 transitions. Word has length 13 [2022-11-16 12:02:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:42,023 INFO L495 AbstractCegarLoop]: Abstraction has 6642 states and 29967 transitions. [2022-11-16 12:02:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 6642 states and 29967 transitions. [2022-11-16 12:02:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:42,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:42,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:42,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (95)] Ended with exit code 0 [2022-11-16 12:02:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:42,226 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 237476759, now seen corresponding path program 8 times [2022-11-16 12:02:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:42,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393698679] [2022-11-16 12:02:42,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:02:42,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:02:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:42,228 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (96)] Waiting until timeout for monitored process [2022-11-16 12:02:42,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:42,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:42,668 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:42,668 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 12:02:42,984 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 12:02:42,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:43,625 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 12:02:43,625 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:43,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393698679] [2022-11-16 12:02:43,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393698679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:43,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:43,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:43,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778175199] [2022-11-16 12:02:43,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:43,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:43,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:43,626 INFO L87 Difference]: Start difference. First operand 6642 states and 29967 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:44,270 INFO L93 Difference]: Finished difference Result 6866 states and 31084 transitions. [2022-11-16 12:02:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:44,294 INFO L225 Difference]: With dead ends: 6866 [2022-11-16 12:02:44,294 INFO L226 Difference]: Without dead ends: 6866 [2022-11-16 12:02:44,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:44,294 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:44,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 105 Unchecked, 0.5s Time] [2022-11-16 12:02:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2022-11-16 12:02:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 6687. [2022-11-16 12:02:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6687 states, 6673 states have (on average 4.529297167690694) internal successors, (30224), 6686 states have internal predecessors, (30224), 0 states have call successors, (0), 0 states 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 12:02:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 30224 transitions. [2022-11-16 12:02:44,452 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 30224 transitions. Word has length 13 [2022-11-16 12:02:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:44,453 INFO L495 AbstractCegarLoop]: Abstraction has 6687 states and 30224 transitions. [2022-11-16 12:02:44,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 30224 transitions. [2022-11-16 12:02:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:44,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:44,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:44,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (96)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:44,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:44,658 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:44,658 INFO L85 PathProgramCache]: Analyzing trace with hash 237477689, now seen corresponding path program 9 times [2022-11-16 12:02:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:44,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194863961] [2022-11-16 12:02:44,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:02:44,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:02:44,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:44,660 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:44,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (97)] Waiting until timeout for monitored process [2022-11-16 12:02:44,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:02:44,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:45,132 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:45,132 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 12:02:45,466 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 12:02:45,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:46,102 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 12:02:46,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194863961] [2022-11-16 12:02:46,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194863961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:46,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:46,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:46,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334667013] [2022-11-16 12:02:46,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:46,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:46,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:46,103 INFO L87 Difference]: Start difference. First operand 6687 states and 30224 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:46,684 INFO L93 Difference]: Finished difference Result 6999 states and 31860 transitions. [2022-11-16 12:02:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:02:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:46,707 INFO L225 Difference]: With dead ends: 6999 [2022-11-16 12:02:46,707 INFO L226 Difference]: Without dead ends: 6999 [2022-11-16 12:02:46,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:46,707 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:46,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-16 12:02:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2022-11-16 12:02:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6727. [2022-11-16 12:02:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6713 states have (on average 4.537017726798749) internal successors, (30457), 6726 states have internal predecessors, (30457), 0 states have call successors, (0), 0 states 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 12:02:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 30457 transitions. [2022-11-16 12:02:46,845 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 30457 transitions. Word has length 13 [2022-11-16 12:02:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:46,846 INFO L495 AbstractCegarLoop]: Abstraction has 6727 states and 30457 transitions. [2022-11-16 12:02:46,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 30457 transitions. [2022-11-16 12:02:46,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:46,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:46,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:46,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (97)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:47,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:47,050 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1602801814, now seen corresponding path program 1 times [2022-11-16 12:02:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:47,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424393285] [2022-11-16 12:02:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:47,051 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 12:02:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:47,052 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:47,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (98)] Waiting until timeout for monitored process [2022-11-16 12:02:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:47,459 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:47,459 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 12:02:47,808 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 12:02:47,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:48,399 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 12:02:48,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:48,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424393285] [2022-11-16 12:02:48,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424393285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:48,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:48,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:48,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388050492] [2022-11-16 12:02:48,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:48,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:48,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:48,400 INFO L87 Difference]: Start difference. First operand 6727 states and 30457 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:48,827 INFO L93 Difference]: Finished difference Result 6761 states and 30655 transitions. [2022-11-16 12:02:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:48,848 INFO L225 Difference]: With dead ends: 6761 [2022-11-16 12:02:48,849 INFO L226 Difference]: Without dead ends: 6761 [2022-11-16 12:02:48,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:48,849 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:48,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 12:02:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2022-11-16 12:02:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6731. [2022-11-16 12:02:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6731 states, 6717 states have (on average 4.537293434569004) internal successors, (30477), 6730 states have internal predecessors, (30477), 0 states have call successors, (0), 0 states 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 12:02:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6731 states to 6731 states and 30477 transitions. [2022-11-16 12:02:49,029 INFO L78 Accepts]: Start accepts. Automaton has 6731 states and 30477 transitions. Word has length 13 [2022-11-16 12:02:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:49,030 INFO L495 AbstractCegarLoop]: Abstraction has 6731 states and 30477 transitions. [2022-11-16 12:02:49,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6731 states and 30477 transitions. [2022-11-16 12:02:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:49,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:49,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:49,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (98)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:49,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:49,234 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:49,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1602799954, now seen corresponding path program 2 times [2022-11-16 12:02:49,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:49,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579182713] [2022-11-16 12:02:49,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:02:49,235 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 12:02:49,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:49,236 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:49,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (99)] Waiting until timeout for monitored process [2022-11-16 12:02:49,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:49,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:49,748 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:49,748 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 12:02:50,076 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 12:02:50,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:50,718 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 12:02:50,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:50,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579182713] [2022-11-16 12:02:50,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579182713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:50,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:50,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:50,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873785114] [2022-11-16 12:02:50,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:50,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:50,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:50,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:50,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:50,720 INFO L87 Difference]: Start difference. First operand 6731 states and 30477 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:50,950 INFO L93 Difference]: Finished difference Result 6785 states and 30789 transitions. [2022-11-16 12:02:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:50,973 INFO L225 Difference]: With dead ends: 6785 [2022-11-16 12:02:50,973 INFO L226 Difference]: Without dead ends: 6785 [2022-11-16 12:02:50,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:50,974 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:50,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-11-16 12:02:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6785 states. [2022-11-16 12:02:51,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6785 to 6775. [2022-11-16 12:02:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6775 states, 6761 states have (on average 4.544446087856826) internal successors, (30725), 6774 states have internal predecessors, (30725), 0 states have call successors, (0), 0 states 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 12:02:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6775 states to 6775 states and 30725 transitions. [2022-11-16 12:02:51,125 INFO L78 Accepts]: Start accepts. Automaton has 6775 states and 30725 transitions. Word has length 13 [2022-11-16 12:02:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:51,125 INFO L495 AbstractCegarLoop]: Abstraction has 6775 states and 30725 transitions. [2022-11-16 12:02:51,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6775 states and 30725 transitions. [2022-11-16 12:02:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:51,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:51,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:51,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (99)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:51,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:51,329 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1602800822, now seen corresponding path program 1 times [2022-11-16 12:02:51,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:51,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765100946] [2022-11-16 12:02:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:51,329 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 12:02:51,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:51,330 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:51,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (100)] Waiting until timeout for monitored process [2022-11-16 12:02:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:51,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:51,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:51,724 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:51,724 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 12:02:52,101 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 12:02:52,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:52,676 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 12:02:52,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:52,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765100946] [2022-11-16 12:02:52,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765100946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:52,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:52,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:52,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756746301] [2022-11-16 12:02:52,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:52,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:52,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:52,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:52,678 INFO L87 Difference]: Start difference. First operand 6775 states and 30725 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:53,208 INFO L93 Difference]: Finished difference Result 6817 states and 30891 transitions. [2022-11-16 12:02:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:02:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:53,230 INFO L225 Difference]: With dead ends: 6817 [2022-11-16 12:02:53,230 INFO L226 Difference]: Without dead ends: 6817 [2022-11-16 12:02:53,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:53,231 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:53,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-16 12:02:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6817 states. [2022-11-16 12:02:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6817 to 6777. [2022-11-16 12:02:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 6763 states have (on average 4.544285080585539) internal successors, (30733), 6776 states have internal predecessors, (30733), 0 states have call successors, (0), 0 states 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 12:02:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 30733 transitions. [2022-11-16 12:02:53,373 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 30733 transitions. Word has length 13 [2022-11-16 12:02:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:53,373 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 30733 transitions. [2022-11-16 12:02:53,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 30733 transitions. [2022-11-16 12:02:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:53,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:53,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:53,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (100)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:53,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:53,577 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1602828722, now seen corresponding path program 2 times [2022-11-16 12:02:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:53,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659994898] [2022-11-16 12:02:53,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:02:53,578 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 12:02:53,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:53,579 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:53,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (101)] Waiting until timeout for monitored process [2022-11-16 12:02:53,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:53,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:53,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:54,016 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:54,016 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 12:02:54,334 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 12:02:54,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:54,952 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 12:02:54,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659994898] [2022-11-16 12:02:54,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659994898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:54,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:54,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:54,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517666158] [2022-11-16 12:02:54,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:54,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:54,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:54,954 INFO L87 Difference]: Start difference. First operand 6777 states and 30733 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:55,539 INFO L93 Difference]: Finished difference Result 6875 states and 31127 transitions. [2022-11-16 12:02:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:02:55,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:55,563 INFO L225 Difference]: With dead ends: 6875 [2022-11-16 12:02:55,563 INFO L226 Difference]: Without dead ends: 6875 [2022-11-16 12:02:55,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:55,563 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:55,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2022-11-16 12:02:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6875 states. [2022-11-16 12:02:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6875 to 6815. [2022-11-16 12:02:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6815 states, 6801 states have (on average 4.541243934715483) internal successors, (30885), 6814 states have internal predecessors, (30885), 0 states have call successors, (0), 0 states 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 12:02:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6815 states to 6815 states and 30885 transitions. [2022-11-16 12:02:55,780 INFO L78 Accepts]: Start accepts. Automaton has 6815 states and 30885 transitions. Word has length 13 [2022-11-16 12:02:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:55,780 INFO L495 AbstractCegarLoop]: Abstraction has 6815 states and 30885 transitions. [2022-11-16 12:02:55,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6815 states and 30885 transitions. [2022-11-16 12:02:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:55,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:55,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:55,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (101)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:55,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:55,984 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1597583584, now seen corresponding path program 3 times [2022-11-16 12:02:55,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:55,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409919350] [2022-11-16 12:02:55,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:02:55,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:02:55,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:55,986 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:55,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (102)] Waiting until timeout for monitored process [2022-11-16 12:02:56,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:02:56,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:56,449 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:56,450 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 12:02:56,780 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 12:02:56,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:57,377 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 12:02:57,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:57,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409919350] [2022-11-16 12:02:57,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409919350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:57,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:57,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587914543] [2022-11-16 12:02:57,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:57,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:57,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:57,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:57,379 INFO L87 Difference]: Start difference. First operand 6815 states and 30885 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:57,884 INFO L93 Difference]: Finished difference Result 6865 states and 31189 transitions. [2022-11-16 12:02:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:57,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:57,907 INFO L225 Difference]: With dead ends: 6865 [2022-11-16 12:02:57,907 INFO L226 Difference]: Without dead ends: 6865 [2022-11-16 12:02:57,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:02:57,908 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:57,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-11-16 12:02:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6865 states. [2022-11-16 12:02:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6865 to 6847. [2022-11-16 12:02:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 6833 states have (on average 4.549539001902532) internal successors, (31087), 6846 states have internal predecessors, (31087), 0 states have call successors, (0), 0 states 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 12:02:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 31087 transitions. [2022-11-16 12:02:58,050 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 31087 transitions. Word has length 13 [2022-11-16 12:02:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:58,050 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 31087 transitions. [2022-11-16 12:02:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:02:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 31087 transitions. [2022-11-16 12:02:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:02:58,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:58,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:58,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (102)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:58,253 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:02:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1598417732, now seen corresponding path program 3 times [2022-11-16 12:02:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:02:58,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952809717] [2022-11-16 12:02:58,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:02:58,255 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 12:02:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:02:58,256 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:02:58,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (103)] Waiting until timeout for monitored process [2022-11-16 12:02:58,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:02:58,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:58,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:02:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:58,689 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:02:58,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:02:59,013 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 12:02:59,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:59,663 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 12:02:59,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:02:59,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952809717] [2022-11-16 12:02:59,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952809717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:59,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:59,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:02:59,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160057379] [2022-11-16 12:02:59,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:59,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:02:59,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:02:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:02:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:59,665 INFO L87 Difference]: Start difference. First operand 6847 states and 31087 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:00,224 INFO L93 Difference]: Finished difference Result 6931 states and 31423 transitions. [2022-11-16 12:03:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:03:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:00,253 INFO L225 Difference]: With dead ends: 6931 [2022-11-16 12:03:00,253 INFO L226 Difference]: Without dead ends: 6931 [2022-11-16 12:03:00,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:03:00,253 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:00,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 12:03:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6931 states. [2022-11-16 12:03:00,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6931 to 6841. [2022-11-16 12:03:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6841 states, 6827 states have (on average 4.549729017137835) internal successors, (31061), 6840 states have internal predecessors, (31061), 0 states have call successors, (0), 0 states 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 12:03:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6841 states to 6841 states and 31061 transitions. [2022-11-16 12:03:00,448 INFO L78 Accepts]: Start accepts. Automaton has 6841 states and 31061 transitions. Word has length 13 [2022-11-16 12:03:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:00,448 INFO L495 AbstractCegarLoop]: Abstraction has 6841 states and 31061 transitions. [2022-11-16 12:03:00,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6841 states and 31061 transitions. [2022-11-16 12:03:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:03:00,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:00,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:00,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (103)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:00,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:00,654 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:00,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:00,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1615314034, now seen corresponding path program 4 times [2022-11-16 12:03:00,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:00,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590841563] [2022-11-16 12:03:00,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:03:00,655 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 12:03:00,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:00,656 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:00,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (104)] Waiting until timeout for monitored process [2022-11-16 12:03:00,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:03:00,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:03:00,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:01,083 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:03:01,084 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 12:03:01,425 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 12:03:01,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:02,019 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 12:03:02,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:02,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590841563] [2022-11-16 12:03:02,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590841563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:02,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:02,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:03:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186141215] [2022-11-16 12:03:02,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:02,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:03:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:03:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:03:02,020 INFO L87 Difference]: Start difference. First operand 6841 states and 31061 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:02,587 INFO L93 Difference]: Finished difference Result 6887 states and 31295 transitions. [2022-11-16 12:03:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:03:02,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:02,611 INFO L225 Difference]: With dead ends: 6887 [2022-11-16 12:03:02,612 INFO L226 Difference]: Without dead ends: 6887 [2022-11-16 12:03:02,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:03:02,612 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:02,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 85 Unchecked, 0.5s Time] [2022-11-16 12:03:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2022-11-16 12:03:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6847. [2022-11-16 12:03:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 6833 states have (on average 4.549539001902532) internal successors, (31087), 6846 states have internal predecessors, (31087), 0 states have call successors, (0), 0 states 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 12:03:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 31087 transitions. [2022-11-16 12:03:02,755 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 31087 transitions. Word has length 13 [2022-11-16 12:03:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:02,756 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 31087 transitions. [2022-11-16 12:03:02,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 31087 transitions. [2022-11-16 12:03:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:03:02,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:02,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:02,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (104)] Ended with exit code 0 [2022-11-16 12:03:02,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:02,959 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:02,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:02,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1615313042, now seen corresponding path program 4 times [2022-11-16 12:03:02,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:02,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518482611] [2022-11-16 12:03:02,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:03:02,959 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 12:03:02,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:02,960 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:02,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (105)] Waiting until timeout for monitored process [2022-11-16 12:03:03,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:03:03,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:03:03,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:03,356 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:03:03,357 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 12:03:03,701 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 12:03:03,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:04,290 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 12:03:04,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:04,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518482611] [2022-11-16 12:03:04,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518482611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:04,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:04,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:03:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051781785] [2022-11-16 12:03:04,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:04,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:03:04,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:03:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:03:04,291 INFO L87 Difference]: Start difference. First operand 6847 states and 31087 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:04,868 INFO L93 Difference]: Finished difference Result 6887 states and 31247 transitions. [2022-11-16 12:03:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:03:04,870 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:04,946 INFO L225 Difference]: With dead ends: 6887 [2022-11-16 12:03:04,947 INFO L226 Difference]: Without dead ends: 6887 [2022-11-16 12:03:04,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:03:04,947 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:04,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2022-11-16 12:03:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2022-11-16 12:03:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6849. [2022-11-16 12:03:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6849 states, 6835 states have (on average 4.549378200438917) internal successors, (31095), 6848 states have internal predecessors, (31095), 0 states have call successors, (0), 0 states 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 12:03:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 31095 transitions. [2022-11-16 12:03:05,077 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 31095 transitions. Word has length 13 [2022-11-16 12:03:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:05,077 INFO L495 AbstractCegarLoop]: Abstraction has 6849 states and 31095 transitions. [2022-11-16 12:03:05,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 12:03:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 31095 transitions. [2022-11-16 12:03:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:03:05,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:05,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:05,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (105)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:05,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:05,280 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1615340942, now seen corresponding path program 5 times [2022-11-16 12:03:05,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:05,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76787706] [2022-11-16 12:03:05,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:03:05,281 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 12:03:05,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:05,282 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:05,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (106)] Waiting until timeout for monitored process [2022-11-16 12:03:05,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:03:05,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:03:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:05,719 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:03:05,719 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 12:03:06,110 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 12:03:06,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:06,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:06,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76787706] [2022-11-16 12:03:06,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76787706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:06,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:06,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:03:06,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052004955] [2022-11-16 12:03:06,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:06,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:03:06,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:03:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:03:06,872 INFO L87 Difference]: Start difference. First operand 6849 states and 31095 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 12:03:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:07,460 INFO L93 Difference]: Finished difference Result 6977 states and 31659 transitions. [2022-11-16 12:03:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:03:07,462 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 12:03:07,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:07,484 INFO L225 Difference]: With dead ends: 6977 [2022-11-16 12:03:07,484 INFO L226 Difference]: Without dead ends: 6977 [2022-11-16 12:03:07,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:03:07,484 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:07,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2022-11-16 12:03:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6977 states. [2022-11-16 12:03:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6977 to 6863. [2022-11-16 12:03:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6849 states have (on average 4.547671192874872) internal successors, (31147), 6862 states have internal predecessors, (31147), 0 states have call successors, (0), 0 states 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 12:03:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 31147 transitions. [2022-11-16 12:03:07,618 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 31147 transitions. Word has length 13 [2022-11-16 12:03:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:07,618 INFO L495 AbstractCegarLoop]: Abstraction has 6863 states and 31147 transitions. [2022-11-16 12:03:07,618 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 12:03:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 31147 transitions. [2022-11-16 12:03:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:03:07,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:07,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:07,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (106)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:07,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:07,821 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:07,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1610439904, now seen corresponding path program 5 times [2022-11-16 12:03:07,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:07,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423434237] [2022-11-16 12:03:07,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:03:07,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:03:07,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:07,822 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:07,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (107)] Waiting until timeout for monitored process [2022-11-16 12:03:08,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:03:08,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:03:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:08,241 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:03:08,241 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 12:03:08,738 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 200 treesize of output 95 [2022-11-16 12:03:08,747 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 95 treesize of output 91 [2022-11-16 12:03:08,845 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 12:03:08,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:08,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:03:09,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:03:09,029 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:03:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:11,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423434237] [2022-11-16 12:03:11,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423434237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:11,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:11,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:03:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725571860] [2022-11-16 12:03:11,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:11,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:03:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:03:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:03:11,158 INFO L87 Difference]: Start difference. First operand 6863 states and 31147 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:03:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:16,762 INFO L93 Difference]: Finished difference Result 11670 states and 50420 transitions. [2022-11-16 12:03:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:03:16,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:03:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:16,800 INFO L225 Difference]: With dead ends: 11670 [2022-11-16 12:03:16,800 INFO L226 Difference]: Without dead ends: 11670 [2022-11-16 12:03:16,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:03:16,801 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 318 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:16,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 28 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 434 Invalid, 0 Unknown, 120 Unchecked, 2.6s Time] [2022-11-16 12:03:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11670 states. [2022-11-16 12:03:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11670 to 4989. [2022-11-16 12:03:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4989 states, 4975 states have (on average 4.39537688442211) internal successors, (21867), 4988 states have internal predecessors, (21867), 0 states have call successors, (0), 0 states 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 12:03:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4989 states to 4989 states and 21867 transitions. [2022-11-16 12:03:16,961 INFO L78 Accepts]: Start accepts. Automaton has 4989 states and 21867 transitions. Word has length 13 [2022-11-16 12:03:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:16,961 INFO L495 AbstractCegarLoop]: Abstraction has 4989 states and 21867 transitions. [2022-11-16 12:03:16,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 12:03:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4989 states and 21867 transitions. [2022-11-16 12:03:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:03:16,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:16,963 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1] [2022-11-16 12:03:16,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (107)] Ended with exit code 0 [2022-11-16 12:03:17,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:17,164 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 691915481, now seen corresponding path program 5 times [2022-11-16 12:03:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:17,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061354776] [2022-11-16 12:03:17,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:03:17,165 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 12:03:17,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:17,165 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:17,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (108)] Waiting until timeout for monitored process [2022-11-16 12:03:17,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:03:17,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:03:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:17,662 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:03:17,662 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 12:03:18,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:03:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:03:18,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:18,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:03:18,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:03:18,580 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:03:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:21,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:21,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061354776] [2022-11-16 12:03:21,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061354776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:21,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:21,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2022-11-16 12:03:21,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004721146] [2022-11-16 12:03:21,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:21,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:03:21,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:03:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:03:21,208 INFO L87 Difference]: Start difference. First operand 4989 states and 21867 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 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 12:03:33,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:33,326 INFO L93 Difference]: Finished difference Result 5945 states and 24964 transitions. [2022-11-16 12:03:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:03:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 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 14 [2022-11-16 12:03:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:33,352 INFO L225 Difference]: With dead ends: 5945 [2022-11-16 12:03:33,352 INFO L226 Difference]: Without dead ends: 5945 [2022-11-16 12:03:33,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:03:33,352 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 384 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:33,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 210 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1214 Invalid, 0 Unknown, 291 Unchecked, 7.6s Time] [2022-11-16 12:03:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5945 states. [2022-11-16 12:03:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5945 to 4992. [2022-11-16 12:03:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4992 states, 4978 states have (on average 4.394335074327039) internal successors, (21875), 4991 states have internal predecessors, (21875), 0 states have call successors, (0), 0 states 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 12:03:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4992 states to 4992 states and 21875 transitions. [2022-11-16 12:03:33,472 INFO L78 Accepts]: Start accepts. Automaton has 4992 states and 21875 transitions. Word has length 14 [2022-11-16 12:03:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:33,472 INFO L495 AbstractCegarLoop]: Abstraction has 4992 states and 21875 transitions. [2022-11-16 12:03:33,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 22 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 12:03:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4992 states and 21875 transitions. [2022-11-16 12:03:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:03:33,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:33,474 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:33,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (108)] Ended with exit code 0 [2022-11-16 12:03:33,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:33,675 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash -850219121, now seen corresponding path program 3 times [2022-11-16 12:03:33,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:33,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59490465] [2022-11-16 12:03:33,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:03:33,675 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 12:03:33,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:33,676 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:33,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (109)] Waiting until timeout for monitored process [2022-11-16 12:03:34,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:03:34,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:34,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:03:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:34,176 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:03:34,177 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 12:03:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:03:34,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:03:36,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59490465] [2022-11-16 12:03:36,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59490465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:36,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:36,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:03:36,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992491150] [2022-11-16 12:03:36,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:36,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:03:36,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:03:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:03:36,793 INFO L87 Difference]: Start difference. First operand 4992 states and 21875 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 12:03:38,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:38,448 INFO L93 Difference]: Finished difference Result 5574 states and 24451 transitions. [2022-11-16 12:03:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:03:38,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 14 [2022-11-16 12:03:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:38,467 INFO L225 Difference]: With dead ends: 5574 [2022-11-16 12:03:38,467 INFO L226 Difference]: Without dead ends: 5574 [2022-11-16 12:03:38,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:03:38,468 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 142 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:38,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 24 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 12:03:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2022-11-16 12:03:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 3084. [2022-11-16 12:03:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3076 states have (on average 4.2350455136540965) internal successors, (13027), 3083 states have internal predecessors, (13027), 0 states have call successors, (0), 0 states 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 12:03:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 13027 transitions. [2022-11-16 12:03:38,543 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 13027 transitions. Word has length 14 [2022-11-16 12:03:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:38,544 INFO L495 AbstractCegarLoop]: Abstraction has 3084 states and 13027 transitions. [2022-11-16 12:03:38,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 12:03:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 13027 transitions. [2022-11-16 12:03:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:03:38,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:38,545 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:38,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (109)] Ended with exit code 0 [2022-11-16 12:03:38,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:38,746 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1988402014, now seen corresponding path program 9 times [2022-11-16 12:03:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556429808] [2022-11-16 12:03:38,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:03:38,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:03:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:38,747 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:38,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (110)] Waiting until timeout for monitored process [2022-11-16 12:03:39,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:03:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:39,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:03:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:39,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:03:39,300 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 12:03:39,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:03:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:03:39,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:03:40,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:40,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556429808] [2022-11-16 12:03:40,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556429808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:40,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:40,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 12:03:40,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017275417] [2022-11-16 12:03:40,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:40,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:03:40,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:40,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:03:40,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:03:40,153 INFO L87 Difference]: Start difference. First operand 3084 states and 13027 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 12:03:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:40,983 INFO L93 Difference]: Finished difference Result 2723 states and 10891 transitions. [2022-11-16 12:03:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:03:40,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 14 [2022-11-16 12:03:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:40,990 INFO L225 Difference]: With dead ends: 2723 [2022-11-16 12:03:40,990 INFO L226 Difference]: Without dead ends: 2723 [2022-11-16 12:03:40,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:03:40,991 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:40,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 56 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 346 Unchecked, 0.6s Time] [2022-11-16 12:03:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2022-11-16 12:03:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2473. [2022-11-16 12:03:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2465 states have (on average 4.178498985801217) internal successors, (10300), 2472 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states 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 12:03:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 10300 transitions. [2022-11-16 12:03:41,035 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 10300 transitions. Word has length 14 [2022-11-16 12:03:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:41,035 INFO L495 AbstractCegarLoop]: Abstraction has 2473 states and 10300 transitions. [2022-11-16 12:03:41,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 12:03:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 10300 transitions. [2022-11-16 12:03:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:03:41,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:41,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:41,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (110)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:41,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:41,237 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:41,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1551538073, now seen corresponding path program 1 times [2022-11-16 12:03:41,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:41,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158113414] [2022-11-16 12:03:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:41,238 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 12:03:41,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:41,238 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:41,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (111)] Waiting until timeout for monitored process [2022-11-16 12:03:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:03:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:41,576 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 12:03:41,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:03:41,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:41,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158113414] [2022-11-16 12:03:41,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158113414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:03:41,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:03:41,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:03:41,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968471997] [2022-11-16 12:03:41,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:41,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:03:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:03:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:03:41,578 INFO L87 Difference]: Start difference. First operand 2473 states and 10300 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:41,734 INFO L93 Difference]: Finished difference Result 2412 states and 10091 transitions. [2022-11-16 12:03:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:03:41,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:03:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:41,741 INFO L225 Difference]: With dead ends: 2412 [2022-11-16 12:03:41,742 INFO L226 Difference]: Without dead ends: 2412 [2022-11-16 12:03:41,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 12:03:41,742 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:41,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:03:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2022-11-16 12:03:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2412. [2022-11-16 12:03:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2407 states have (on average 4.192355629414209) internal successors, (10091), 2411 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states 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 12:03:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 10091 transitions. [2022-11-16 12:03:41,805 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 10091 transitions. Word has length 14 [2022-11-16 12:03:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:41,805 INFO L495 AbstractCegarLoop]: Abstraction has 2412 states and 10091 transitions. [2022-11-16 12:03:41,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 10091 transitions. [2022-11-16 12:03:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:03:41,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:41,807 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:41,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (111)] Ended with exit code 0 [2022-11-16 12:03:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:42,007 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:03:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash -24529888, now seen corresponding path program 2 times [2022-11-16 12:03:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:03:42,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662371395] [2022-11-16 12:03:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:03:42,008 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 12:03:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:03:42,009 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:03:42,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (112)] Waiting until timeout for monitored process [2022-11-16 12:03:42,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:03:42,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:42,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:03:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:42,498 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:03:42,498 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 12:03:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:43,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:46,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:03:46,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662371395] [2022-11-16 12:03:46,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662371395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:46,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:03:46,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-16 12:03:46,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329793439] [2022-11-16 12:03:46,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:46,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:03:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:03:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:03:46,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:03:46,208 INFO L87 Difference]: Start difference. First operand 2412 states and 10091 transitions. Second operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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 12:04:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:08,672 INFO L93 Difference]: Finished difference Result 5440 states and 22326 transitions. [2022-11-16 12:04:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:04:08,673 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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 12:04:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:08,688 INFO L225 Difference]: With dead ends: 5440 [2022-11-16 12:04:08,689 INFO L226 Difference]: Without dead ends: 5440 [2022-11-16 12:04:08,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=728, Invalid=1822, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 12:04:08,689 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1140 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 2681 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:08,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 394 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2681 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-11-16 12:04:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2022-11-16 12:04:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 2707. [2022-11-16 12:04:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2702 states have (on average 4.272020725388601) internal successors, (11543), 2706 states have internal predecessors, (11543), 0 states have call successors, (0), 0 states 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 12:04:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 11543 transitions. [2022-11-16 12:04:08,757 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 11543 transitions. Word has length 15 [2022-11-16 12:04:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:08,757 INFO L495 AbstractCegarLoop]: Abstraction has 2707 states and 11543 transitions. [2022-11-16 12:04:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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 12:04:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 11543 transitions. [2022-11-16 12:04:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:04:08,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:08,758 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:08,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (112)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:08,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:04:08,959 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:04:08,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:08,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1222420637, now seen corresponding path program 10 times [2022-11-16 12:04:08,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:08,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303892968] [2022-11-16 12:04:08,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:04:08,960 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 12:04:08,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:08,960 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:04:08,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (113)] Waiting until timeout for monitored process [2022-11-16 12:04:09,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:04:09,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:09,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:04:09,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:09,414 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:04:09,415 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 12:04:09,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:04:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:09,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:10,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:04:10,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:04:10,190 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:04:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:12,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303892968] [2022-11-16 12:04:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303892968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:12,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:04:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937479877] [2022-11-16 12:04:12,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:12,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:04:12,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:04:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:04:12,555 INFO L87 Difference]: Start difference. First operand 2707 states and 11543 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 12:04:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:26,075 INFO L93 Difference]: Finished difference Result 3647 states and 14349 transitions. [2022-11-16 12:04:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:04:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 12:04:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:26,085 INFO L225 Difference]: With dead ends: 3647 [2022-11-16 12:04:26,085 INFO L226 Difference]: Without dead ends: 3647 [2022-11-16 12:04:26,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:04:26,086 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 429 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:26,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 308 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1476 Invalid, 0 Unknown, 697 Unchecked, 9.5s Time] [2022-11-16 12:04:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2022-11-16 12:04:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2818. [2022-11-16 12:04:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2813 states have (on average 4.268396729470316) internal successors, (12007), 2817 states have internal predecessors, (12007), 0 states have call successors, (0), 0 states 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 12:04:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 12007 transitions. [2022-11-16 12:04:26,141 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 12007 transitions. Word has length 15 [2022-11-16 12:04:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:26,141 INFO L495 AbstractCegarLoop]: Abstraction has 2818 states and 12007 transitions. [2022-11-16 12:04:26,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 12:04:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 12007 transitions. [2022-11-16 12:04:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:04:26,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:26,143 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:26,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (113)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:26,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:04:26,344 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:04:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1388654417, now seen corresponding path program 11 times [2022-11-16 12:04:26,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:26,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969757202] [2022-11-16 12:04:26,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:04:26,344 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 12:04:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:26,345 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:04:26,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (114)] Waiting until timeout for monitored process [2022-11-16 12:04:26,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:04:26,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:26,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:04:26,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:26,847 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:04:26,847 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 12:04:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:27,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:27,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:04:27,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:04:27,612 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:04:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:29,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969757202] [2022-11-16 12:04:29,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969757202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:29,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:29,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:04:29,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799110435] [2022-11-16 12:04:29,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:29,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:04:29,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:04:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:04:29,840 INFO L87 Difference]: Start difference. First operand 2818 states and 12007 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 12:04:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:48,594 INFO L93 Difference]: Finished difference Result 5020 states and 20208 transitions. [2022-11-16 12:04:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:04:48,596 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 12:04:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:48,610 INFO L225 Difference]: With dead ends: 5020 [2022-11-16 12:04:48,610 INFO L226 Difference]: Without dead ends: 5020 [2022-11-16 12:04:48,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:04:48,610 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 545 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:48,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 277 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1317 Invalid, 0 Unknown, 258 Unchecked, 8.9s Time] [2022-11-16 12:04:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2022-11-16 12:04:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 3666. [2022-11-16 12:04:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 3661 states have (on average 4.361103523627424) internal successors, (15966), 3665 states have internal predecessors, (15966), 0 states have call successors, (0), 0 states 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 12:04:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 15966 transitions. [2022-11-16 12:04:48,694 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 15966 transitions. Word has length 15 [2022-11-16 12:04:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:48,694 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 15966 transitions. [2022-11-16 12:04:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 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 12:04:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 15966 transitions. [2022-11-16 12:04:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:04:48,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:48,696 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:48,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (114)] Ended with exit code 0 [2022-11-16 12:04:48,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:04:48,896 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:04:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1375610209, now seen corresponding path program 12 times [2022-11-16 12:04:48,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:48,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593147801] [2022-11-16 12:04:48,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:04:48,897 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 12:04:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:48,898 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:04:48,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (115)] Waiting until timeout for monitored process [2022-11-16 12:04:49,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:04:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:49,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:04:49,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:49,431 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:04:49,431 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 12:04:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:50,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:52,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:52,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593147801] [2022-11-16 12:04:52,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593147801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:52,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:52,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:04:52,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492422457] [2022-11-16 12:04:52,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:52,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:04:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:52,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:04:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:04:52,379 INFO L87 Difference]: Start difference. First operand 3666 states and 15966 transitions. Second operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 12:05:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:09,651 INFO L93 Difference]: Finished difference Result 6772 states and 28029 transitions. [2022-11-16 12:05:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:05:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 12:05:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:09,674 INFO L225 Difference]: With dead ends: 6772 [2022-11-16 12:05:09,674 INFO L226 Difference]: Without dead ends: 6772 [2022-11-16 12:05:09,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 12:05:09,674 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 731 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:09,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 194 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1150 Invalid, 0 Unknown, 639 Unchecked, 8.6s Time] [2022-11-16 12:05:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2022-11-16 12:05:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 4558. [2022-11-16 12:05:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4558 states, 4553 states have (on average 4.452229299363057) internal successors, (20271), 4557 states have internal predecessors, (20271), 0 states have call successors, (0), 0 states 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 12:05:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4558 states to 4558 states and 20271 transitions. [2022-11-16 12:05:09,813 INFO L78 Accepts]: Start accepts. Automaton has 4558 states and 20271 transitions. Word has length 15 [2022-11-16 12:05:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:09,813 INFO L495 AbstractCegarLoop]: Abstraction has 4558 states and 20271 transitions. [2022-11-16 12:05:09,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 12:05:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4558 states and 20271 transitions. [2022-11-16 12:05:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:05:09,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:09,815 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:09,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (115)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:10,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:05:10,016 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:05:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:10,016 INFO L85 PathProgramCache]: Analyzing trace with hash -144110046, now seen corresponding path program 5 times [2022-11-16 12:05:10,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:10,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182994866] [2022-11-16 12:05:10,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:05:10,017 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 12:05:10,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:10,018 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:05:10,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (116)] Waiting until timeout for monitored process [2022-11-16 12:05:10,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:05:10,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:10,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:05:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:10,526 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:10,527 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 12:05:11,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:05:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:11,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:05:11,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:05:11,293 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:05:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:13,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:13,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182994866] [2022-11-16 12:05:13,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182994866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:13,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:13,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:05:13,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647086445] [2022-11-16 12:05:13,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:13,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:05:13,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:05:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:05:13,638 INFO L87 Difference]: Start difference. First operand 4558 states and 20271 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 12:05:34,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:34,543 INFO L93 Difference]: Finished difference Result 9529 states and 40670 transitions. [2022-11-16 12:05:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:05:34,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 16 [2022-11-16 12:05:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:34,572 INFO L225 Difference]: With dead ends: 9529 [2022-11-16 12:05:34,572 INFO L226 Difference]: Without dead ends: 9529 [2022-11-16 12:05:34,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 12:05:34,572 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 669 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 2172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:34,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 292 Invalid, 2172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1492 Invalid, 0 Unknown, 662 Unchecked, 13.3s Time] [2022-11-16 12:05:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9529 states. [2022-11-16 12:05:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 4503. [2022-11-16 12:05:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4498 states have (on average 4.42974655402401) internal successors, (19925), 4502 states have internal predecessors, (19925), 0 states have call successors, (0), 0 states 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 12:05:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 19925 transitions. [2022-11-16 12:05:34,692 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 19925 transitions. Word has length 16 [2022-11-16 12:05:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:34,692 INFO L495 AbstractCegarLoop]: Abstraction has 4503 states and 19925 transitions. [2022-11-16 12:05:34,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 12:05:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 19925 transitions. [2022-11-16 12:05:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:05:34,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:34,694 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:34,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (116)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:05:34,895 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:05:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash 306353866, now seen corresponding path program 5 times [2022-11-16 12:05:34,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523880446] [2022-11-16 12:05:34,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:05:34,896 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 12:05:34,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:34,896 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:05:34,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (117)] Waiting until timeout for monitored process [2022-11-16 12:05:35,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:05:35,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:05:35,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:35,428 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:35,428 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 12:05:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:35,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:36,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:05:36,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:05:36,179 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:05:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:38,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523880446] [2022-11-16 12:05:38,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523880446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:38,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:38,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:05:38,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345066614] [2022-11-16 12:05:38,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:38,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:05:38,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:05:38,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:05:38,275 INFO L87 Difference]: Start difference. First operand 4503 states and 19925 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 12:05:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:48,383 INFO L93 Difference]: Finished difference Result 5529 states and 23474 transitions. [2022-11-16 12:05:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:05:48,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 16 [2022-11-16 12:05:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:48,401 INFO L225 Difference]: With dead ends: 5529 [2022-11-16 12:05:48,401 INFO L226 Difference]: Without dead ends: 5529 [2022-11-16 12:05:48,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:05:48,402 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 628 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:48,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 264 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 952 Invalid, 0 Unknown, 343 Unchecked, 5.7s Time] [2022-11-16 12:05:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2022-11-16 12:05:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 4718. [2022-11-16 12:05:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4718 states, 4713 states have (on average 4.438998514746446) internal successors, (20921), 4717 states have internal predecessors, (20921), 0 states have call successors, (0), 0 states 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 12:05:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4718 states to 4718 states and 20921 transitions. [2022-11-16 12:05:48,501 INFO L78 Accepts]: Start accepts. Automaton has 4718 states and 20921 transitions. Word has length 16 [2022-11-16 12:05:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:48,501 INFO L495 AbstractCegarLoop]: Abstraction has 4718 states and 20921 transitions. [2022-11-16 12:05:48,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 12:05:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4718 states and 20921 transitions. [2022-11-16 12:05:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:05:48,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:48,505 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:48,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (117)] Ended with exit code 0 [2022-11-16 12:05:48,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:05:48,705 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:05:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash 301290570, now seen corresponding path program 6 times [2022-11-16 12:05:48,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:48,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866876549] [2022-11-16 12:05:48,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:05:48,706 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 12:05:48,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:48,707 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:05:48,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (118)] Waiting until timeout for monitored process [2022-11-16 12:05:49,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:05:49,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:49,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:05:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:49,224 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:49,224 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 12:05:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:49,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:52,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866876549] [2022-11-16 12:05:52,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866876549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:52,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:52,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:05:52,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930881431] [2022-11-16 12:05:52,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:52,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:05:52,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:05:52,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:05:52,292 INFO L87 Difference]: Start difference. First operand 4718 states and 20921 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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 12:06:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:21,639 INFO L93 Difference]: Finished difference Result 10366 states and 43697 transitions. [2022-11-16 12:06:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 12:06:21,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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 16 [2022-11-16 12:06:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:21,674 INFO L225 Difference]: With dead ends: 10366 [2022-11-16 12:06:21,674 INFO L226 Difference]: Without dead ends: 10366 [2022-11-16 12:06:21,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=594, Invalid=2598, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 12:06:21,675 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 432 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1123 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:21,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 225 Invalid, 2829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1699 Invalid, 0 Unknown, 1123 Unchecked, 15.4s Time] [2022-11-16 12:06:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10366 states. [2022-11-16 12:06:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10366 to 6159. [2022-11-16 12:06:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6159 states, 6154 states have (on average 4.535261618459539) internal successors, (27910), 6158 states have internal predecessors, (27910), 0 states have call successors, (0), 0 states 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 12:06:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6159 states to 6159 states and 27910 transitions. [2022-11-16 12:06:21,845 INFO L78 Accepts]: Start accepts. Automaton has 6159 states and 27910 transitions. Word has length 16 [2022-11-16 12:06:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:21,845 INFO L495 AbstractCegarLoop]: Abstraction has 6159 states and 27910 transitions. [2022-11-16 12:06:21,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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 12:06:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6159 states and 27910 transitions. [2022-11-16 12:06:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:06:21,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:21,848 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:21,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (118)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:22,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:06:22,049 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:06:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:22,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1415557716, now seen corresponding path program 7 times [2022-11-16 12:06:22,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015576722] [2022-11-16 12:06:22,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:06:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:22,051 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:06:22,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (119)] Waiting until timeout for monitored process [2022-11-16 12:06:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:22,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:06:22,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:22,522 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:22,523 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 12:06:23,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:06:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:23,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:23,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:06:23,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:06:23,280 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:06:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:25,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:25,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015576722] [2022-11-16 12:06:25,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015576722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:25,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:25,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:06:25,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590458420] [2022-11-16 12:06:25,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:25,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:06:25,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:25,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:06:25,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:06:25,665 INFO L87 Difference]: Start difference. First operand 6159 states and 27910 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 12:06:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:33,449 INFO L93 Difference]: Finished difference Result 6717 states and 29701 transitions. [2022-11-16 12:06:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:06:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 16 [2022-11-16 12:06:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:33,471 INFO L225 Difference]: With dead ends: 6717 [2022-11-16 12:06:33,471 INFO L226 Difference]: Without dead ends: 6717 [2022-11-16 12:06:33,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:06:33,471 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 210 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:33,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 274 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 640 Invalid, 0 Unknown, 75 Unchecked, 3.7s Time] [2022-11-16 12:06:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2022-11-16 12:06:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 6163. [2022-11-16 12:06:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6158 states have (on average 4.534913933095161) internal successors, (27926), 6162 states have internal predecessors, (27926), 0 states have call successors, (0), 0 states 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 12:06:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 27926 transitions. [2022-11-16 12:06:33,603 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 27926 transitions. Word has length 16 [2022-11-16 12:06:33,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:33,603 INFO L495 AbstractCegarLoop]: Abstraction has 6163 states and 27926 transitions. [2022-11-16 12:06:33,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 12:06:33,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 27926 transitions. [2022-11-16 12:06:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:06:33,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:33,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:33,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (119)] Ended with exit code 0 [2022-11-16 12:06:33,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:06:33,807 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:06:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:33,808 INFO L85 PathProgramCache]: Analyzing trace with hash 355628649, now seen corresponding path program 6 times [2022-11-16 12:06:33,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:33,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574829058] [2022-11-16 12:06:33,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:06:33,808 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 12:06:33,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:33,809 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:06:33,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (120)] Waiting until timeout for monitored process [2022-11-16 12:06:34,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:06:34,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:34,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:06:34,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:34,377 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:34,378 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 12:06:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:35,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:38,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:38,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574829058] [2022-11-16 12:06:38,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574829058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:38,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:38,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:06:38,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581919973] [2022-11-16 12:06:38,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:38,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:06:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:06:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:06:38,058 INFO L87 Difference]: Start difference. First operand 6163 states and 27926 transitions. Second operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 12:07:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:05,347 INFO L93 Difference]: Finished difference Result 11774 states and 50340 transitions. [2022-11-16 12:07:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:07:05,348 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 17 [2022-11-16 12:07:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:05,389 INFO L225 Difference]: With dead ends: 11774 [2022-11-16 12:07:05,389 INFO L226 Difference]: Without dead ends: 11774 [2022-11-16 12:07:05,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=432, Invalid=2118, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 12:07:05,390 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 795 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 4795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2561 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:05,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 368 Invalid, 4795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2227 Invalid, 0 Unknown, 2561 Unchecked, 16.4s Time] [2022-11-16 12:07:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11774 states. [2022-11-16 12:07:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11774 to 6333. [2022-11-16 12:07:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6333 states, 6328 states have (on average 4.524494310998736) internal successors, (28631), 6332 states have internal predecessors, (28631), 0 states have call successors, (0), 0 states 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 12:07:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6333 states to 6333 states and 28631 transitions. [2022-11-16 12:07:05,571 INFO L78 Accepts]: Start accepts. Automaton has 6333 states and 28631 transitions. Word has length 17 [2022-11-16 12:07:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:05,571 INFO L495 AbstractCegarLoop]: Abstraction has 6333 states and 28631 transitions. [2022-11-16 12:07:05,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 12:07:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6333 states and 28631 transitions. [2022-11-16 12:07:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:07:05,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:05,574 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:05,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (120)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:05,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:07:05,775 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:07:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1866464287, now seen corresponding path program 8 times [2022-11-16 12:07:05,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:05,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151806616] [2022-11-16 12:07:05,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:05,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:05,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:05,776 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:07:05,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (121)] Waiting until timeout for monitored process [2022-11-16 12:07:06,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:07:06,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:06,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:07:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:06,298 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:06,298 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 12:07:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:07,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:09,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151806616] [2022-11-16 12:07:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151806616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:09,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:09,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:07:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218524523] [2022-11-16 12:07:09,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:09,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:07:09,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:07:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:07:09,931 INFO L87 Difference]: Start difference. First operand 6333 states and 28631 transitions. Second operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 12:07:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:24,575 INFO L93 Difference]: Finished difference Result 11982 states and 54835 transitions. [2022-11-16 12:07:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:07:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 17 [2022-11-16 12:07:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:24,618 INFO L225 Difference]: With dead ends: 11982 [2022-11-16 12:07:24,618 INFO L226 Difference]: Without dead ends: 11982 [2022-11-16 12:07:24,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:07:24,619 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 655 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 607 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:24,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 247 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1695 Invalid, 0 Unknown, 607 Unchecked, 10.0s Time] [2022-11-16 12:07:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11982 states. [2022-11-16 12:07:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11982 to 7057. [2022-11-16 12:07:24,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7057 states, 7052 states have (on average 4.585224049914918) internal successors, (32335), 7056 states have internal predecessors, (32335), 0 states have call successors, (0), 0 states 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 12:07:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7057 states to 7057 states and 32335 transitions. [2022-11-16 12:07:24,822 INFO L78 Accepts]: Start accepts. Automaton has 7057 states and 32335 transitions. Word has length 17 [2022-11-16 12:07:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:24,823 INFO L495 AbstractCegarLoop]: Abstraction has 7057 states and 32335 transitions. [2022-11-16 12:07:24,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 12:07:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 7057 states and 32335 transitions. [2022-11-16 12:07:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:07:24,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:24,827 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:24,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (121)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:07:25,027 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:07:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1363080611, now seen corresponding path program 9 times [2022-11-16 12:07:25,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134945553] [2022-11-16 12:07:25,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:07:25,028 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 12:07:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:25,029 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:07:25,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (122)] Waiting until timeout for monitored process [2022-11-16 12:07:25,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:07:25,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:07:25,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:25,583 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:25,583 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 12:07:26,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:07:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:07:26,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:26,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:07:26,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:07:26,358 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:07:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:07:28,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:28,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134945553] [2022-11-16 12:07:28,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134945553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:28,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:28,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:07:28,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913830796] [2022-11-16 12:07:28,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:28,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:07:28,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:07:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:07:28,103 INFO L87 Difference]: Start difference. First operand 7057 states and 32335 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:31,069 INFO L93 Difference]: Finished difference Result 7721 states and 34950 transitions. [2022-11-16 12:07:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:07:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:07:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:31,094 INFO L225 Difference]: With dead ends: 7721 [2022-11-16 12:07:31,094 INFO L226 Difference]: Without dead ends: 7721 [2022-11-16 12:07:31,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:07:31,094 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:31,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 63 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 62 Unchecked, 1.8s Time] [2022-11-16 12:07:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7721 states. [2022-11-16 12:07:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7721 to 7127. [2022-11-16 12:07:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7127 states, 7122 states have (on average 4.585650098286998) internal successors, (32659), 7126 states have internal predecessors, (32659), 0 states have call successors, (0), 0 states 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 12:07:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7127 states to 7127 states and 32659 transitions. [2022-11-16 12:07:31,294 INFO L78 Accepts]: Start accepts. Automaton has 7127 states and 32659 transitions. Word has length 17 [2022-11-16 12:07:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:31,294 INFO L495 AbstractCegarLoop]: Abstraction has 7127 states and 32659 transitions. [2022-11-16 12:07:31,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7127 states and 32659 transitions. [2022-11-16 12:07:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:07:31,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:31,299 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:31,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (122)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:31,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:07:31,500 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:07:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:31,500 INFO L85 PathProgramCache]: Analyzing trace with hash -362578696, now seen corresponding path program 10 times [2022-11-16 12:07:31,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:31,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719498842] [2022-11-16 12:07:31,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:07:31,501 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 12:07:31,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:31,501 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:07:31,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (123)] Waiting until timeout for monitored process [2022-11-16 12:07:31,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:07:31,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:07:31,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:32,005 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:32,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:07:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:32,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:35,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:35,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719498842] [2022-11-16 12:07:35,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719498842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:35,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:35,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:07:35,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188963752] [2022-11-16 12:07:35,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:35,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:07:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:35,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:07:35,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:07:35,601 INFO L87 Difference]: Start difference. First operand 7127 states and 32659 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:08:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:00,638 INFO L93 Difference]: Finished difference Result 13571 states and 62926 transitions. [2022-11-16 12:08:00,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 12:08:00,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:08:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:00,696 INFO L225 Difference]: With dead ends: 13571 [2022-11-16 12:08:00,697 INFO L226 Difference]: Without dead ends: 13571 [2022-11-16 12:08:00,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:08:00,698 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 760 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 3083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 666 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:00,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 291 Invalid, 3083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2408 Invalid, 0 Unknown, 666 Unchecked, 17.6s Time] [2022-11-16 12:08:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13571 states. [2022-11-16 12:08:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13571 to 8528. [2022-11-16 12:08:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8528 states, 8523 states have (on average 4.708553326293559) internal successors, (40131), 8527 states have internal predecessors, (40131), 0 states have call successors, (0), 0 states 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 12:08:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8528 states to 8528 states and 40131 transitions. [2022-11-16 12:08:00,944 INFO L78 Accepts]: Start accepts. Automaton has 8528 states and 40131 transitions. Word has length 18 [2022-11-16 12:08:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:00,944 INFO L495 AbstractCegarLoop]: Abstraction has 8528 states and 40131 transitions. [2022-11-16 12:08:00,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:08:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8528 states and 40131 transitions. [2022-11-16 12:08:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:08:00,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:00,950 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:00,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (123)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:01,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:08:01,151 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:08:01,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash -362405716, now seen corresponding path program 11 times [2022-11-16 12:08:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:01,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647033221] [2022-11-16 12:08:01,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:08:01,151 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 12:08:01,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:01,152 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:08:01,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (124)] Waiting until timeout for monitored process [2022-11-16 12:08:01,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:08:01,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:01,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:08:01,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:01,700 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:08:01,701 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 12:08:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:02,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:05,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647033221] [2022-11-16 12:08:05,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647033221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:05,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:05,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:08:05,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268999107] [2022-11-16 12:08:05,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:08:05,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:08:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:08:05,432 INFO L87 Difference]: Start difference. First operand 8528 states and 40131 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:08:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:26,894 INFO L93 Difference]: Finished difference Result 15579 states and 73134 transitions. [2022-11-16 12:08:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:08:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:08:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:26,953 INFO L225 Difference]: With dead ends: 15579 [2022-11-16 12:08:26,953 INFO L226 Difference]: Without dead ends: 15579 [2022-11-16 12:08:26,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=383, Invalid=1873, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 12:08:26,954 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 575 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:26,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 285 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2173 Invalid, 0 Unknown, 872 Unchecked, 14.7s Time] [2022-11-16 12:08:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15579 states. [2022-11-16 12:08:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15579 to 9299. [2022-11-16 12:08:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9299 states, 9294 states have (on average 4.722078760490639) internal successors, (43887), 9298 states have internal predecessors, (43887), 0 states have call successors, (0), 0 states 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 12:08:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9299 states to 9299 states and 43887 transitions. [2022-11-16 12:08:27,220 INFO L78 Accepts]: Start accepts. Automaton has 9299 states and 43887 transitions. Word has length 18 [2022-11-16 12:08:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:27,221 INFO L495 AbstractCegarLoop]: Abstraction has 9299 states and 43887 transitions. [2022-11-16 12:08:27,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:08:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 9299 states and 43887 transitions. [2022-11-16 12:08:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:08:27,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:27,225 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:27,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (124)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:27,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:08:27,426 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:08:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:27,426 INFO L85 PathProgramCache]: Analyzing trace with hash -362398989, now seen corresponding path program 7 times [2022-11-16 12:08:27,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:27,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939402771] [2022-11-16 12:08:27,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:08:27,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:27,427 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:08:27,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (125)] Waiting until timeout for monitored process [2022-11-16 12:08:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:08:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:27,919 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:08:27,920 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 12:08:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:28,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:31,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:31,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939402771] [2022-11-16 12:08:31,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939402771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:31,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:31,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:08:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231567091] [2022-11-16 12:08:31,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:31,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:08:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:08:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:08:31,428 INFO L87 Difference]: Start difference. First operand 9299 states and 43887 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:08:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:56,203 INFO L93 Difference]: Finished difference Result 20257 states and 94352 transitions. [2022-11-16 12:08:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:08:56,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:08:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:56,279 INFO L225 Difference]: With dead ends: 20257 [2022-11-16 12:08:56,279 INFO L226 Difference]: Without dead ends: 20257 [2022-11-16 12:08:56,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=430, Invalid=2120, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 12:08:56,279 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1013 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 3609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1311 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:56,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1013 Valid, 286 Invalid, 3609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2291 Invalid, 0 Unknown, 1311 Unchecked, 15.5s Time] [2022-11-16 12:08:56,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2022-11-16 12:08:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 10338. [2022-11-16 12:08:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10338 states, 10333 states have (on average 4.762605245330494) internal successors, (49212), 10337 states have internal predecessors, (49212), 0 states have call successors, (0), 0 states 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 12:08:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10338 states to 10338 states and 49212 transitions. [2022-11-16 12:08:56,674 INFO L78 Accepts]: Start accepts. Automaton has 10338 states and 49212 transitions. Word has length 18 [2022-11-16 12:08:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:56,674 INFO L495 AbstractCegarLoop]: Abstraction has 10338 states and 49212 transitions. [2022-11-16 12:08:56,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:08:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 10338 states and 49212 transitions. [2022-11-16 12:08:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:08:56,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:56,680 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:56,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (125)] Ended with exit code 0 [2022-11-16 12:08:56,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:08:56,880 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:08:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash -362370159, now seen corresponding path program 8 times [2022-11-16 12:08:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:56,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661994786] [2022-11-16 12:08:56,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:08:56,881 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 12:08:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:56,882 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:08:56,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (126)] Waiting until timeout for monitored process [2022-11-16 12:08:57,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:08:57,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:08:57,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:57,389 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:08:57,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:08:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:58,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:00,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661994786] [2022-11-16 12:09:00,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661994786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:00,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:00,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:09:00,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324425706] [2022-11-16 12:09:00,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:00,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:09:00,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:00,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:09:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:09:00,827 INFO L87 Difference]: Start difference. First operand 10338 states and 49212 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:09:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:05,657 INFO L93 Difference]: Finished difference Result 11245 states and 53029 transitions. [2022-11-16 12:09:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:09:05,658 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:09:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:05,694 INFO L225 Difference]: With dead ends: 11245 [2022-11-16 12:09:05,694 INFO L226 Difference]: Without dead ends: 11245 [2022-11-16 12:09:05,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:09:05,695 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 576 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:05,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 213 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 249 Unchecked, 1.4s Time] [2022-11-16 12:09:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2022-11-16 12:09:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 10483. [2022-11-16 12:09:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10483 states, 10478 states have (on average 4.766558503531209) internal successors, (49944), 10482 states have internal predecessors, (49944), 0 states have call successors, (0), 0 states 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 12:09:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10483 states to 10483 states and 49944 transitions. [2022-11-16 12:09:06,018 INFO L78 Accepts]: Start accepts. Automaton has 10483 states and 49944 transitions. Word has length 18 [2022-11-16 12:09:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:06,019 INFO L495 AbstractCegarLoop]: Abstraction has 10483 states and 49944 transitions. [2022-11-16 12:09:06,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:09:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10483 states and 49944 transitions. [2022-11-16 12:09:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:09:06,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:06,024 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:06,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (126)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:06,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:09:06,225 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:09:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:06,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1403578916, now seen corresponding path program 12 times [2022-11-16 12:09:06,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:06,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954197615] [2022-11-16 12:09:06,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:09:06,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:06,227 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:09:06,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (127)] Waiting until timeout for monitored process [2022-11-16 12:09:06,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:09:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:09:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:06,789 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:06,789 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 12:09:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:07,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:10,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954197615] [2022-11-16 12:09:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954197615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:10,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:10,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:09:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365769126] [2022-11-16 12:09:10,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:10,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:09:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:09:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:09:10,258 INFO L87 Difference]: Start difference. First operand 10483 states and 49944 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:09:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:39,612 INFO L93 Difference]: Finished difference Result 20345 states and 93468 transitions. [2022-11-16 12:09:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 12:09:39,613 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:09:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:39,688 INFO L225 Difference]: With dead ends: 20345 [2022-11-16 12:09:39,688 INFO L226 Difference]: Without dead ends: 20345 [2022-11-16 12:09:39,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=539, Invalid=2883, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 12:09:39,689 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 856 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 3947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1511 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:39,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 312 Invalid, 3947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2429 Invalid, 0 Unknown, 1511 Unchecked, 18.4s Time] [2022-11-16 12:09:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20345 states. [2022-11-16 12:09:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20345 to 12700. [2022-11-16 12:09:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12700 states, 12695 states have (on average 4.821189444663253) internal successors, (61205), 12699 states have internal predecessors, (61205), 0 states have call successors, (0), 0 states 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 12:09:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12700 states to 12700 states and 61205 transitions. [2022-11-16 12:09:40,175 INFO L78 Accepts]: Start accepts. Automaton has 12700 states and 61205 transitions. Word has length 18 [2022-11-16 12:09:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:40,175 INFO L495 AbstractCegarLoop]: Abstraction has 12700 states and 61205 transitions. [2022-11-16 12:09:40,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:09:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 12700 states and 61205 transitions. [2022-11-16 12:09:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:09:40,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:40,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:40,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (127)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:40,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:09:40,381 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:09:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1825965982, now seen corresponding path program 13 times [2022-11-16 12:09:40,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:40,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237593001] [2022-11-16 12:09:40,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:09:40,383 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 12:09:40,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:40,384 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:09:40,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (128)] Waiting until timeout for monitored process [2022-11-16 12:09:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:40,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:09:40,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:40,889 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:40,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:09:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:41,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:44,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:44,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237593001] [2022-11-16 12:09:44,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237593001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:44,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:44,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:09:44,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306709219] [2022-11-16 12:09:44,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:44,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:09:44,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:09:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:09:44,380 INFO L87 Difference]: Start difference. First operand 12700 states and 61205 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:10:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:08,587 INFO L93 Difference]: Finished difference Result 18880 states and 88533 transitions. [2022-11-16 12:10:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:10:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:10:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:08,669 INFO L225 Difference]: With dead ends: 18880 [2022-11-16 12:10:08,669 INFO L226 Difference]: Without dead ends: 18880 [2022-11-16 12:10:08,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 12:10:08,670 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 632 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 3616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1257 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:08,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 317 Invalid, 3616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2351 Invalid, 0 Unknown, 1257 Unchecked, 16.5s Time] [2022-11-16 12:10:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18880 states. [2022-11-16 12:10:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18880 to 14392. [2022-11-16 12:10:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14392 states, 14387 states have (on average 4.843052755960242) internal successors, (69677), 14391 states have internal predecessors, (69677), 0 states have call successors, (0), 0 states 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 12:10:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14392 states to 14392 states and 69677 transitions. [2022-11-16 12:10:09,240 INFO L78 Accepts]: Start accepts. Automaton has 14392 states and 69677 transitions. Word has length 18 [2022-11-16 12:10:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:09,240 INFO L495 AbstractCegarLoop]: Abstraction has 14392 states and 69677 transitions. [2022-11-16 12:10:09,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:10:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 14392 states and 69677 transitions. [2022-11-16 12:10:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:10:09,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:09,251 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:09,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (128)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:09,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:10:09,458 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:10:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash 717079434, now seen corresponding path program 10 times [2022-11-16 12:10:09,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:09,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616797673] [2022-11-16 12:10:09,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:10:09,460 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 12:10:09,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:09,461 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:10:09,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (129)] Waiting until timeout for monitored process [2022-11-16 12:10:09,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:10:09,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:10:09,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:09,970 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:09,970 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 12:10:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:10,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:13,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:13,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616797673] [2022-11-16 12:10:13,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616797673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:13,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:13,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-16 12:10:13,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897672001] [2022-11-16 12:10:13,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:13,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:10:13,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:13,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:10:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:10:13,768 INFO L87 Difference]: Start difference. First operand 14392 states and 69677 transitions. Second operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:10:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:51,131 INFO L93 Difference]: Finished difference Result 30393 states and 140958 transitions. [2022-11-16 12:10:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-16 12:10:51,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:10:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:51,249 INFO L225 Difference]: With dead ends: 30393 [2022-11-16 12:10:51,250 INFO L226 Difference]: Without dead ends: 30393 [2022-11-16 12:10:51,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=749, Invalid=4653, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 12:10:51,251 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 842 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 3103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 4367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1256 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:51,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 393 Invalid, 4367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3103 Invalid, 0 Unknown, 1256 Unchecked, 20.4s Time] [2022-11-16 12:10:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30393 states. [2022-11-16 12:10:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30393 to 22956. [2022-11-16 12:10:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22956 states, 22951 states have (on average 4.92523201603416) internal successors, (113039), 22955 states have internal predecessors, (113039), 0 states have call successors, (0), 0 states 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 12:10:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22956 states to 22956 states and 113039 transitions. [2022-11-16 12:10:52,363 INFO L78 Accepts]: Start accepts. Automaton has 22956 states and 113039 transitions. Word has length 18 [2022-11-16 12:10:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:52,363 INFO L495 AbstractCegarLoop]: Abstraction has 22956 states and 113039 transitions. [2022-11-16 12:10:52,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:10:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22956 states and 113039 transitions. [2022-11-16 12:10:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:10:52,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:52,377 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:52,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (129)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:52,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:10:52,593 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-16 12:10:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:52,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1122572056, now seen corresponding path program 11 times [2022-11-16 12:10:52,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:52,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716857372] [2022-11-16 12:10:52,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:10:52,594 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 12:10:52,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:52,595 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 12:10:52,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_474333b3-30eb-46f5-8833-865d8a0a42ae/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 (130)] Waiting until timeout for monitored process [2022-11-16 12:10:52,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:10:52,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:10:52,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:53,139 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:53,139 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 12:10:53,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:10:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:54,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:54,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-16 12:10:54,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 12:10:54,434 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:10:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:57,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:57,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716857372] [2022-11-16 12:10:57,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716857372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:57,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:57,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-16 12:10:57,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923836725] [2022-11-16 12:10:57,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:57,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:10:57,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:10:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:10:57,883 INFO L87 Difference]: Start difference. First operand 22956 states and 113039 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:11:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:25,059 INFO L93 Difference]: Finished difference Result 78313 states and 391613 transitions. [2022-11-16 12:11:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 12:11:25,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:11:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:26,231 INFO L225 Difference]: With dead ends: 78313 [2022-11-16 12:11:26,232 INFO L226 Difference]: Without dead ends: 78313 [2022-11-16 12:11:26,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=637, Invalid=4475, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 12:11:26,233 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 772 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 934 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:26,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 300 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 565 Invalid, 0 Unknown, 934 Unchecked, 2.0s Time] [2022-11-16 12:11:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78313 states.