./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 b5237d83 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_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-b5237d8 [2022-11-22 02:49:25,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:49:25,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:49:25,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:49:25,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:49:25,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:49:25,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:49:25,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:49:25,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:49:25,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:49:25,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:49:25,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:49:25,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:49:25,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:49:25,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:49:25,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:49:25,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:49:25,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:49:25,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:49:25,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:49:25,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:49:25,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:49:25,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:49:25,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:49:25,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:49:25,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:49:25,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:49:25,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:49:25,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:49:25,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:49:25,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:49:25,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:49:25,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:49:25,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:49:25,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:49:25,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:49:25,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:49:25,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:49:25,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:49:25,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:49:25,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:49:25,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:49:25,924 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:49:25,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:49:25,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:49:25,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:49:25,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:49:25,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:49:25,927 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:49:25,927 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:49:25,927 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:49:25,927 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:49:25,928 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:49:25,929 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:49:25,929 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:49:25,929 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:49:25,929 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:49:25,930 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:49:25,930 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:49:25,930 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:49:25,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:49:25,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:49:25,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:49:25,931 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:49:25,931 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:49:25,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:49:25,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:49:25,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:49:25,932 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:49:25,933 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:49:25,933 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:49:25,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:49:25,933 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:49:25,934 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:49:25,934 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:49:25,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:49:25,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:49:25,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:49:25,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:49:25,935 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:49:25,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:49:25,935 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:49:25,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:49:25,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:49:25,937 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_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-22 02:49:26,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:49:26,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:49:26,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:49:26,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:49:26,309 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:49:26,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-22 02:49:29,374 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:49:29,596 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:49:29,597 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-22 02:49:29,603 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/data/e5e3117dc/3a1b3a8cacb34aa4bbdd73452fd7a532/FLAGb0bb497f2 [2022-11-22 02:49:29,613 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/data/e5e3117dc/3a1b3a8cacb34aa4bbdd73452fd7a532 [2022-11-22 02:49:29,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:49:29,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:49:29,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:49:29,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:49:29,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:49:29,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:49:29" (1/1) ... [2022-11-22 02:49:29,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b4b5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:29, skipping insertion in model container [2022-11-22 02:49:29,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:49:29" (1/1) ... [2022-11-22 02:49:29,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:49:29,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:49:29,870 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-22 02:49:29,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:49:29,889 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) [2022-11-22 02:49:29,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@33c14d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:29, skipping insertion in model container [2022-11-22 02:49:29,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:49:29,890 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 02:49:29,891 INFO L158 Benchmark]: Toolchain (without parser) took 273.72ms. Allocated memory is still 153.1MB. Free memory was 122.0MB in the beginning and 112.3MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 02:49:29,892 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 95.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:49:29,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.45ms. Allocated memory is still 153.1MB. Free memory was 122.0MB in the beginning and 112.3MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 02:49:29,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 95.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.45ms. Allocated memory is still 153.1MB. Free memory was 122.0MB in the beginning and 112.3MB in the end (delta: 9.7MB). 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_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-b5237d8 [2022-11-22 02:49:32,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:49:32,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:49:32,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:49:32,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:49:32,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:49:32,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:49:32,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:49:32,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:49:32,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:49:32,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:49:32,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:49:32,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:49:32,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:49:32,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:49:32,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:49:32,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:49:32,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:49:32,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:49:32,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:49:32,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:49:32,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:49:32,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:49:32,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:49:32,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:49:32,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:49:32,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:49:32,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:49:32,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:49:32,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:49:32,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:49:32,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:49:32,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:49:32,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:49:32,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:49:32,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:49:32,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:49:32,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:49:32,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:49:32,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:49:32,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:49:32,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 02:49:32,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:49:32,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:49:32,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:49:32,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:49:32,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:49:32,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:49:32,283 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:49:32,283 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:49:32,284 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:49:32,284 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:49:32,284 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:49:32,284 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:49:32,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:49:32,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:49:32,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:49:32,285 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:49:32,286 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:49:32,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:49:32,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:49:32,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:49:32,286 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:49:32,286 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:49:32,287 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:49:32,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:49:32,287 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:49:32,287 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 02:49:32,287 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 02:49:32,288 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:49:32,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:49:32,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:49:32,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 02:49:32,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:49:32,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:49:32,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:49:32,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:49:32,289 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 02:49:32,289 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 02:49:32,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:49:32,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 02:49:32,290 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_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-22 02:49:32,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:49:32,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:49:32,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:49:32,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:49:32,682 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:49:32,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-22 02:49:35,845 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:49:36,121 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:49:36,124 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-22 02:49:36,131 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/data/df0e8c55b/0c6e824e7f674104950d1785ce5a8c6e/FLAGd635df57d [2022-11-22 02:49:36,146 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/data/df0e8c55b/0c6e824e7f674104950d1785ce5a8c6e [2022-11-22 02:49:36,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:49:36,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:49:36,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:49:36,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:49:36,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:49:36,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648f21d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36, skipping insertion in model container [2022-11-22 02:49:36,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:49:36,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:49:36,454 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-22 02:49:36,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:49:36,491 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 02:49:36,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:49:36,521 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-22 02:49:36,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:49:36,543 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:49:36,582 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-22 02:49:36,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:49:36,609 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:49:36,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36 WrapperNode [2022-11-22 02:49:36,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:49:36,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:49:36,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:49:36,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:49:36,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,681 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-11-22 02:49:36,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:49:36,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:49:36,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:49:36,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:49:36,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:49:36,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:49:36,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:49:36,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:49:36,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (1/1) ... [2022-11-22 02:49:36,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:49:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:49:36,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:49:36,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:49:36,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:49:36,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 02:49:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:49:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 02:49:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 02:49:36,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 02:49:36,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 02:49:36,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 02:49:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 02:49:36,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 02:49:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 02:49:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 02:49:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:49:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:49:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:49:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:49:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 02:49:36,870 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 02:49:37,043 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:49:37,050 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:49:37,705 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:49:37,828 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:49:37,828 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 02:49:37,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:49:37 BoogieIcfgContainer [2022-11-22 02:49:37,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:49:37,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:49:37,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:49:37,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:49:37,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:49:36" (1/3) ... [2022-11-22 02:49:37,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a94807b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:49:37, skipping insertion in model container [2022-11-22 02:49:37,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:49:36" (2/3) ... [2022-11-22 02:49:37,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a94807b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:49:37, skipping insertion in model container [2022-11-22 02:49:37,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:49:37" (3/3) ... [2022-11-22 02:49:37,840 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2022-11-22 02:49:37,860 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:49:37,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-22 02:49:37,860 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 02:49:37,975 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-22 02:49:38,028 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 02:49:38,047 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 180 transitions, 384 flow [2022-11-22 02:49:38,053 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 180 transitions, 384 flow [2022-11-22 02:49:38,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-11-22 02:49:38,176 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-11-22 02:49:38,176 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-22 02:49:38,182 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. [2022-11-22 02:49:38,186 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-22 02:50:07,696 INFO L134 LiptonReduction]: Checked pairs total: 3680 [2022-11-22 02:50:07,696 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-11-22 02:50:07,705 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-11-22 02:50:07,835 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) [2022-11-22 02:50:07,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:50:07,865 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;@1d16ca3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:50:07,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-22 02:50:07,872 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) [2022-11-22 02:50:07,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:50:07,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:07,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:50:07,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash 23390, now seen corresponding path program 1 times [2022-11-22 02:50:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:07,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651299859] [2022-11-22 02:50:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:07,898 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 [2022-11-22 02:50:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:07,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:07,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:50:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:08,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:08,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:08,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651299859] [2022-11-22 02:50:08,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651299859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:08,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:50:08,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:50:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894157942] [2022-11-22 02:50:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:08,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:08,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:08,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:08,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:50:08,153 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) [2022-11-22 02:50:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:08,556 INFO L93 Difference]: Finished difference Result 752 states and 2568 transitions. [2022-11-22 02:50:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:08,559 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 [2022-11-22 02:50:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:08,588 INFO L225 Difference]: With dead ends: 752 [2022-11-22 02:50:08,588 INFO L226 Difference]: Without dead ends: 752 [2022-11-22 02:50:08,589 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 [2022-11-22 02:50:08,595 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-22 02:50:08,600 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] [2022-11-22 02:50:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-22 02:50:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2022-11-22 02:50:08,702 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) [2022-11-22 02:50:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2568 transitions. [2022-11-22 02:50:08,710 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2568 transitions. Word has length 2 [2022-11-22 02:50:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:08,711 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2568 transitions. [2022-11-22 02:50:08,711 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) [2022-11-22 02:50:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2568 transitions. [2022-11-22 02:50:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:50:08,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:08,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:50:08,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 02:50:08,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:08,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash 23234, now seen corresponding path program 1 times [2022-11-22 02:50:08,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:08,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103649615] [2022-11-22 02:50:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:08,951 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 [2022-11-22 02:50:08,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:08,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:08,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:50:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:09,166 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:50:09,167 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 [2022-11-22 02:50:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:09,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:09,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:09,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103649615] [2022-11-22 02:50:09,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103649615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:09,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:50:09,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:50:09,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912325550] [2022-11-22 02:50:09,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:09,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:09,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:50:09,196 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) [2022-11-22 02:50:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:09,404 INFO L93 Difference]: Finished difference Result 749 states and 2566 transitions. [2022-11-22 02:50:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:09,405 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 [2022-11-22 02:50:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:09,411 INFO L225 Difference]: With dead ends: 749 [2022-11-22 02:50:09,411 INFO L226 Difference]: Without dead ends: 749 [2022-11-22 02:50:09,412 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 [2022-11-22 02:50:09,413 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 [2022-11-22 02:50:09,414 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] [2022-11-22 02:50:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-22 02:50:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-22 02:50:09,437 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) [2022-11-22 02:50:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-11-22 02:50:09,442 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-11-22 02:50:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:09,442 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-11-22 02:50:09,443 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) [2022-11-22 02:50:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-11-22 02:50:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 02:50:09,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:09,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 02:50:09,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:09,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:09,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash 23235, now seen corresponding path program 1 times [2022-11-22 02:50:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:09,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500646909] [2022-11-22 02:50:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:09,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:09,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:09,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:09,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:50:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:09,900 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:09,900 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 [2022-11-22 02:50:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:09,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:09,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500646909] [2022-11-22 02:50:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500646909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:09,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:50:09,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:50:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520039671] [2022-11-22 02:50:09,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:09,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:09,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:50:09,932 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) [2022-11-22 02:50:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:10,222 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-22 02:50:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:10,222 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 [2022-11-22 02:50:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:10,227 INFO L225 Difference]: With dead ends: 749 [2022-11-22 02:50:10,228 INFO L226 Difference]: Without dead ends: 749 [2022-11-22 02:50:10,228 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 [2022-11-22 02:50:10,229 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 [2022-11-22 02:50:10,229 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] [2022-11-22 02:50:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-22 02:50:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-22 02:50:10,252 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) [2022-11-22 02:50:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-22 02:50:10,257 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-22 02:50:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:10,258 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-22 02:50:10,258 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) [2022-11-22 02:50:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-22 02:50:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:50:10,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:10,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:50:10,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:10,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:10,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:10,470 INFO L85 PathProgramCache]: Analyzing trace with hash 724765, now seen corresponding path program 1 times [2022-11-22 02:50:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:10,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962649119] [2022-11-22 02:50:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:10,471 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 [2022-11-22 02:50:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:10,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:10,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:50:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:10,671 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-22 02:50:10,672 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 [2022-11-22 02:50:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:10,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:10,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:10,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962649119] [2022-11-22 02:50:10,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962649119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:10,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:50:10,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:50:10,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812758004] [2022-11-22 02:50:10,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:10,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:10,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:50:10,773 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) [2022-11-22 02:50:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:11,061 INFO L93 Difference]: Finished difference Result 623 states and 2064 transitions. [2022-11-22 02:50:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:11,062 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 [2022-11-22 02:50:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:11,067 INFO L225 Difference]: With dead ends: 623 [2022-11-22 02:50:11,067 INFO L226 Difference]: Without dead ends: 623 [2022-11-22 02:50:11,067 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 [2022-11-22 02:50:11,068 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:11,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:50:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-22 02:50:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2022-11-22 02:50:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 519 states have (on average 3.976878612716763) internal successors, (2064), 622 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2064 transitions. [2022-11-22 02:50:11,090 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2064 transitions. Word has length 3 [2022-11-22 02:50:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:11,091 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 2064 transitions. [2022-11-22 02:50:11,091 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) [2022-11-22 02:50:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2064 transitions. [2022-11-22 02:50:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:50:11,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:11,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:50:11,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:11,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:11,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:11,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 724766, now seen corresponding path program 1 times [2022-11-22 02:50:11,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:11,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758965983] [2022-11-22 02:50:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:11,305 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 [2022-11-22 02:50:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:11,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:11,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:50:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:11,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:11,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:11,569 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-22 02:50:11,569 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 [2022-11-22 02:50:11,595 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-22 02:50:11,596 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 [2022-11-22 02:50:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:11,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:12,139 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:12,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758965983] [2022-11-22 02:50:12,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758965983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:12,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14939186] [2022-11-22 02:50:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:12,139 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:12,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:12,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:12,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-22 02:50:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:12,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:50:12,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:12,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:12,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:12,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:12,450 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-22 02:50:12,450 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 28 [2022-11-22 02:50:12,470 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 10 treesize of output 8 [2022-11-22 02:50:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:12,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:12,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [14939186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:12,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:50:12,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-11-22 02:50:12,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947073348] [2022-11-22 02:50:12,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:12,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:12,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:50:12,568 INFO L87 Difference]: Start difference. First operand 623 states and 2064 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) [2022-11-22 02:50:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:12,807 INFO L93 Difference]: Finished difference Result 497 states and 1563 transitions. [2022-11-22 02:50:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:12,808 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 [2022-11-22 02:50:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:12,811 INFO L225 Difference]: With dead ends: 497 [2022-11-22 02:50:12,811 INFO L226 Difference]: Without dead ends: 497 [2022-11-22 02:50:12,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:50:12,815 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 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 [2022-11-22 02:50:12,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:50:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-22 02:50:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-11-22 02:50:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 421 states have (on average 3.7125890736342044) internal successors, (1563), 496 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1563 transitions. [2022-11-22 02:50:12,844 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1563 transitions. Word has length 3 [2022-11-22 02:50:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:12,844 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1563 transitions. [2022-11-22 02:50:12,845 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) [2022-11-22 02:50:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1563 transitions. [2022-11-22 02:50:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:50:12,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:12,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:50:12,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-22 02:50:13,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:13,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:13,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:13,249 INFO L85 PathProgramCache]: Analyzing trace with hash 724610, now seen corresponding path program 1 times [2022-11-22 02:50:13,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:13,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883047634] [2022-11-22 02:50:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:13,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:13,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:13,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:13,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:13,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:50:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:13,471 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:13,472 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 [2022-11-22 02:50:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:13,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:13,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:13,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883047634] [2022-11-22 02:50:13,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883047634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:13,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914214578] [2022-11-22 02:50:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:13,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:13,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:13,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:13,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-22 02:50:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:13,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:50:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:14,060 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:14,060 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 [2022-11-22 02:50:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:14,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:14,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914214578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:14,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520515295] [2022-11-22 02:50:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:14,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:14,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:14,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:14,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:50:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:14,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:50:14,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:14,423 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:14,423 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 [2022-11-22 02:50:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:14,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:14,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520515295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:14,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:50:14,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-22 02:50:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854302730] [2022-11-22 02:50:14,613 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:50:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:50:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:50:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:50:14,614 INFO L87 Difference]: Start difference. First operand 497 states and 1563 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) [2022-11-22 02:50:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:16,346 INFO L93 Difference]: Finished difference Result 1486 states and 4685 transitions. [2022-11-22 02:50:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:50:16,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 02:50:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:16,356 INFO L225 Difference]: With dead ends: 1486 [2022-11-22 02:50:16,356 INFO L226 Difference]: Without dead ends: 1486 [2022-11-22 02:50:16,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:50:16,357 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 251 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:16,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 15 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 02:50:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-11-22 02:50:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 500. [2022-11-22 02:50:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.7004716981132075) internal successors, (1569), 499 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1569 transitions. [2022-11-22 02:50:16,384 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1569 transitions. Word has length 3 [2022-11-22 02:50:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:16,384 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1569 transitions. [2022-11-22 02:50:16,384 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) [2022-11-22 02:50:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1569 transitions. [2022-11-22 02:50:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:50:16,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:16,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:50:16,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:16,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:16,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:16,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:16,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash 696517786, now seen corresponding path program 1 times [2022-11-22 02:50:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:16,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453423551] [2022-11-22 02:50:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:16,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:16,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:16,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:17,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:50:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:17,188 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 02:50:17,188 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 40 [2022-11-22 02:50:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:17,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:17,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:17,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453423551] [2022-11-22 02:50:17,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453423551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:17,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:50:17,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:50:17,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490436243] [2022-11-22 02:50:17,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:17,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:17,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:50:17,321 INFO L87 Difference]: Start difference. First operand 500 states and 1569 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) [2022-11-22 02:50:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:17,519 INFO L93 Difference]: Finished difference Result 470 states and 1484 transitions. [2022-11-22 02:50:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:17,519 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 [2022-11-22 02:50:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:17,522 INFO L225 Difference]: With dead ends: 470 [2022-11-22 02:50:17,523 INFO L226 Difference]: Without dead ends: 470 [2022-11-22 02:50:17,523 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 [2022-11-22 02:50:17,524 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:17,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:50:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-22 02:50:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-11-22 02:50:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6551724137931036) internal successors, (1484), 469 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1484 transitions. [2022-11-22 02:50:17,549 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1484 transitions. Word has length 5 [2022-11-22 02:50:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:17,549 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1484 transitions. [2022-11-22 02:50:17,550 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) [2022-11-22 02:50:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1484 transitions. [2022-11-22 02:50:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:50:17,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:17,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:50:17,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:17,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:17,762 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:17,762 INFO L85 PathProgramCache]: Analyzing trace with hash 696517787, now seen corresponding path program 1 times [2022-11-22 02:50:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467945353] [2022-11-22 02:50:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:17,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:17,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:17,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:17,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:17,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:50:17,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:18,005 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-22 02:50:18,005 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 [2022-11-22 02:50:18,020 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 [2022-11-22 02:50:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:18,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:18,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467945353] [2022-11-22 02:50:18,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467945353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [232165165] [2022-11-22 02:50:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:18,506 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:18,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:18,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-22 02:50:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:50:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:18,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:18,833 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-22 02:50:18,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-22 02:50:18,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-22 02:50:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:18,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [232165165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:18,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:50:18,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-22 02:50:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108004908] [2022-11-22 02:50:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:50:18,965 INFO L87 Difference]: Start difference. First operand 470 states and 1484 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) [2022-11-22 02:50:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:19,132 INFO L93 Difference]: Finished difference Result 440 states and 1399 transitions. [2022-11-22 02:50:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:19,133 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 [2022-11-22 02:50:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:19,140 INFO L225 Difference]: With dead ends: 440 [2022-11-22 02:50:19,140 INFO L226 Difference]: Without dead ends: 440 [2022-11-22 02:50:19,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:50:19,143 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:19,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:50:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-22 02:50:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-22 02:50:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6056701030927836) internal successors, (1399), 439 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1399 transitions. [2022-11-22 02:50:19,164 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1399 transitions. Word has length 5 [2022-11-22 02:50:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:19,165 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1399 transitions. [2022-11-22 02:50:19,165 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) [2022-11-22 02:50:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1399 transitions. [2022-11-22 02:50:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:50:19,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:19,175 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 02:50:19,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:19,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:19,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:19,577 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash 116314755, now seen corresponding path program 2 times [2022-11-22 02:50:19,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:19,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532804898] [2022-11-22 02:50:19,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:50:19,578 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 [2022-11-22 02:50:19,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:19,579 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:19,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:19,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:50:19,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:50:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:50:19,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:19,824 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:19,824 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 [2022-11-22 02:50:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:19,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:20,688 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:20,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532804898] [2022-11-22 02:50:20,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532804898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:20,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [768443985] [2022-11-22 02:50:20,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:50:20,689 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:20,691 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:20,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-22 02:50:20,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:50:20,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:50:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:50:20,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:21,101 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:21,102 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 [2022-11-22 02:50:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:21,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:22,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [768443985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:22,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199258067] [2022-11-22 02:50:22,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:50:22,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:22,028 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:22,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:50:22,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:50:22,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:50:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:50:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:22,313 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:22,313 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 [2022-11-22 02:50:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:22,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:22,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199258067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:22,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:50:22,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-22 02:50:22,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961167234] [2022-11-22 02:50:22,596 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:50:22,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:50:22,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:50:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:50:22,597 INFO L87 Difference]: Start difference. First operand 440 states and 1399 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:28,039 INFO L93 Difference]: Finished difference Result 3910 states and 12515 transitions. [2022-11-22 02:50:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:50:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 02:50:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:28,066 INFO L225 Difference]: With dead ends: 3910 [2022-11-22 02:50:28,066 INFO L226 Difference]: Without dead ends: 3910 [2022-11-22 02:50:28,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:50:28,067 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 896 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:28,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 90 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-22 02:50:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2022-11-22 02:50:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 446. [2022-11-22 02:50:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 394 states have (on average 3.581218274111675) internal successors, (1411), 445 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1411 transitions. [2022-11-22 02:50:28,117 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1411 transitions. Word has length 6 [2022-11-22 02:50:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:28,118 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1411 transitions. [2022-11-22 02:50:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1411 transitions. [2022-11-22 02:50:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:50:28,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:28,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:50:28,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:28,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-22 02:50:28,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:28,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:28,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash 117209272, now seen corresponding path program 1 times [2022-11-22 02:50:28,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:28,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102442948] [2022-11-22 02:50:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:28,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:28,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:28,733 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:28,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:50:28,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:28,925 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:50:28,926 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 [2022-11-22 02:50:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:28,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:28,948 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:28,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102442948] [2022-11-22 02:50:28,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102442948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:28,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:50:28,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:50:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238626776] [2022-11-22 02:50:28,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:28,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:50:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:50:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:50:28,949 INFO L87 Difference]: Start difference. First operand 446 states and 1411 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) [2022-11-22 02:50:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:29,110 INFO L93 Difference]: Finished difference Result 264 states and 810 transitions. [2022-11-22 02:50:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:50:29,110 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 [2022-11-22 02:50:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:29,113 INFO L225 Difference]: With dead ends: 264 [2022-11-22 02:50:29,113 INFO L226 Difference]: Without dead ends: 264 [2022-11-22 02:50:29,113 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 [2022-11-22 02:50:29,114 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:29,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:50:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-22 02:50:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-22 02:50:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 243 states have (on average 3.3333333333333335) internal successors, (810), 263 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 810 transitions. [2022-11-22 02:50:29,123 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 810 transitions. Word has length 6 [2022-11-22 02:50:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:29,124 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 810 transitions. [2022-11-22 02:50:29,124 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) [2022-11-22 02:50:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 810 transitions. [2022-11-22 02:50:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:50:29,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:29,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:50:29,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-22 02:50:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:29,336 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash 117209273, now seen corresponding path program 1 times [2022-11-22 02:50:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:29,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393303649] [2022-11-22 02:50:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:29,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:29,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:29,338 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:29,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:50:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:29,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:29,703 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 [2022-11-22 02:50:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:29,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393303649] [2022-11-22 02:50:29,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393303649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [15458759] [2022-11-22 02:50:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:29,790 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:29,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:29,791 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-22 02:50:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:50:29,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:30,075 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:30,075 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 [2022-11-22 02:50:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:30,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [15458759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:30,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665610100] [2022-11-22 02:50:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:30,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:30,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:30,655 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:30,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:50:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:30,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:50:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:30,879 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:30,880 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 [2022-11-22 02:50:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:30,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:31,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665610100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:31,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:50:31,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-22 02:50:31,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352495163] [2022-11-22 02:50:31,079 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:50:31,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:50:31,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:31,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:50:31,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:50:31,080 INFO L87 Difference]: Start difference. First operand 264 states and 810 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:32,782 INFO L93 Difference]: Finished difference Result 1216 states and 3758 transitions. [2022-11-22 02:50:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:50:32,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 02:50:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:32,796 INFO L225 Difference]: With dead ends: 1216 [2022-11-22 02:50:32,797 INFO L226 Difference]: Without dead ends: 1216 [2022-11-22 02:50:32,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:50:32,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 541 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:32,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 29 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:50:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-11-22 02:50:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 314. [2022-11-22 02:50:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 293 states have (on average 3.4948805460750854) internal successors, (1024), 313 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1024 transitions. [2022-11-22 02:50:32,818 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1024 transitions. Word has length 6 [2022-11-22 02:50:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:32,819 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 1024 transitions. [2022-11-22 02:50:32,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1024 transitions. [2022-11-22 02:50:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:50:32,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:32,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:32,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:33,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:33,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:33,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:33,433 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:33,433 INFO L85 PathProgramCache]: Analyzing trace with hash -661476673, now seen corresponding path program 1 times [2022-11-22 02:50:33,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:33,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679719494] [2022-11-22 02:50:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:33,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:33,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:33,435 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:33,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:33,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:50:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:33,664 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:33,665 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 [2022-11-22 02:50:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:33,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:34,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:34,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679719494] [2022-11-22 02:50:34,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679719494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:34,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426696719] [2022-11-22 02:50:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:34,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:34,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:34,310 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:34,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-22 02:50:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:34,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:50:34,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:34,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:34,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426696719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:34,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735064922] [2022-11-22 02:50:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:34,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:34,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:34,964 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:34,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 02:50:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:35,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:50:35,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:35,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:35,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735064922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:35,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:50:35,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-22 02:50:35,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3058388] [2022-11-22 02:50:35,140 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:50:35,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:50:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:50:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:50:35,141 INFO L87 Difference]: Start difference. First operand 314 states and 1024 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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) [2022-11-22 02:50:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:39,136 INFO L93 Difference]: Finished difference Result 815 states and 2597 transitions. [2022-11-22 02:50:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:50:39,137 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 7 [2022-11-22 02:50:39,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:39,142 INFO L225 Difference]: With dead ends: 815 [2022-11-22 02:50:39,143 INFO L226 Difference]: Without dead ends: 815 [2022-11-22 02:50:39,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:50:39,143 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 700 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:39,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 82 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 02:50:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-22 02:50:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 615. [2022-11-22 02:50:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 594 states have (on average 3.5505050505050506) internal successors, (2109), 614 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2109 transitions. [2022-11-22 02:50:39,167 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2109 transitions. Word has length 7 [2022-11-22 02:50:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:39,168 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2109 transitions. [2022-11-22 02:50:39,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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) [2022-11-22 02:50:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2109 transitions. [2022-11-22 02:50:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:50:39,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:39,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:39,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:39,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:39,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 02:50:39,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:39,772 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -661290164, now seen corresponding path program 1 times [2022-11-22 02:50:39,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:39,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739329817] [2022-11-22 02:50:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:39,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:39,774 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:39,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:50:39,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:40,038 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:40,038 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 [2022-11-22 02:50:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:40,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:40,518 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:40,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739329817] [2022-11-22 02:50:40,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739329817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:40,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815625267] [2022-11-22 02:50:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:40,519 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:40,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:40,523 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:40,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-22 02:50:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:50:40,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:40,852 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-22 02:50:40,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-22 02:50:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:40,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:40,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815625267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:40,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:50:40,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-22 02:50:40,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930593452] [2022-11-22 02:50:40,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:40,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:40,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:50:40,977 INFO L87 Difference]: Start difference. First operand 615 states and 2109 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) [2022-11-22 02:50:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:41,117 INFO L93 Difference]: Finished difference Result 567 states and 1957 transitions. [2022-11-22 02:50:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:41,118 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 [2022-11-22 02:50:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:41,122 INFO L225 Difference]: With dead ends: 567 [2022-11-22 02:50:41,122 INFO L226 Difference]: Without dead ends: 567 [2022-11-22 02:50:41,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:50:41,123 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 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 [2022-11-22 02:50:41,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:50:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-22 02:50:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-11-22 02:50:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 552 states have (on average 3.545289855072464) internal successors, (1957), 566 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1957 transitions. [2022-11-22 02:50:41,141 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1957 transitions. Word has length 7 [2022-11-22 02:50:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:41,141 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1957 transitions. [2022-11-22 02:50:41,142 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) [2022-11-22 02:50:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1957 transitions. [2022-11-22 02:50:41,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:50:41,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:41,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:41,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:41,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:41,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:41,556 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash -661290162, now seen corresponding path program 1 times [2022-11-22 02:50:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:41,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030994656] [2022-11-22 02:50:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:41,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:41,558 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:41,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:50:41,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:41,743 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 02:50:41,744 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 [2022-11-22 02:50:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:50:41,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:50:41,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:41,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030994656] [2022-11-22 02:50:41,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030994656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:41,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:50:41,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:50:41,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479788370] [2022-11-22 02:50:41,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:41,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:50:41,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:50:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:50:41,777 INFO L87 Difference]: Start difference. First operand 567 states and 1957 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) [2022-11-22 02:50:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:41,897 INFO L93 Difference]: Finished difference Result 519 states and 1805 transitions. [2022-11-22 02:50:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:50:41,897 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 [2022-11-22 02:50:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:41,901 INFO L225 Difference]: With dead ends: 519 [2022-11-22 02:50:41,901 INFO L226 Difference]: Without dead ends: 519 [2022-11-22 02:50:41,901 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 [2022-11-22 02:50:41,902 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:41,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:50:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-22 02:50:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-11-22 02:50:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 510 states have (on average 3.5392156862745097) internal successors, (1805), 518 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1805 transitions. [2022-11-22 02:50:41,918 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1805 transitions. Word has length 7 [2022-11-22 02:50:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:41,919 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 1805 transitions. [2022-11-22 02:50:41,919 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) [2022-11-22 02:50:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1805 transitions. [2022-11-22 02:50:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:50:41,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:41,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:41,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:42,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:42,132 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash 974836540, now seen corresponding path program 1 times [2022-11-22 02:50:42,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:42,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498416678] [2022-11-22 02:50:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:42,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:42,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:42,134 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:42,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:42,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:50:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:42,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:42,585 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 [2022-11-22 02:50:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:42,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498416678] [2022-11-22 02:50:42,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498416678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [875616547] [2022-11-22 02:50:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:42,664 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:42,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:42,665 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:42,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-22 02:50:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:42,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:50:42,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:43,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:43,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [875616547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060364980] [2022-11-22 02:50:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:43,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:43,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:43,357 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:43,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-22 02:50:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:43,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:50:43,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:43,610 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:43,610 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 [2022-11-22 02:50:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:43,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060364980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:44,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:50:44,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 22 [2022-11-22 02:50:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708320140] [2022-11-22 02:50:44,438 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:50:44,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:50:44,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:50:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:50:44,440 INFO L87 Difference]: Start difference. First operand 519 states and 1805 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:49,242 INFO L93 Difference]: Finished difference Result 1306 states and 4520 transitions. [2022-11-22 02:50:49,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:50:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:50:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:49,249 INFO L225 Difference]: With dead ends: 1306 [2022-11-22 02:50:49,250 INFO L226 Difference]: Without dead ends: 1306 [2022-11-22 02:50:49,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:50:49,251 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 646 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:49,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 57 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-22 02:50:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-11-22 02:50:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 615. [2022-11-22 02:50:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 606 states have (on average 3.6056105610561056) internal successors, (2185), 614 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2185 transitions. [2022-11-22 02:50:49,277 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2185 transitions. Word has length 8 [2022-11-22 02:50:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:49,277 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2185 transitions. [2022-11-22 02:50:49,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2185 transitions. [2022-11-22 02:50:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:50:49,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:49,279 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:49,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:49,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 02:50:49,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:49,881 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:50:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1118435752, now seen corresponding path program 1 times [2022-11-22 02:50:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:50:49,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947370381] [2022-11-22 02:50:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:49,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:50:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:50:49,884 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:50:49,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:50:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:50:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:50,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:50,490 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 [2022-11-22 02:50:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:50,717 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:50:50,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947370381] [2022-11-22 02:50:50,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947370381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:50,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1128430282] [2022-11-22 02:50:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:50,718 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:50:50,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:50:50,719 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:50:50,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-22 02:50:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:50:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:51,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:52,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1128430282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:52,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878293685] [2022-11-22 02:50:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:52,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:52,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:52,078 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:52,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-22 02:50:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:52,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:50:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:52,335 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:50:52,336 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 [2022-11-22 02:50:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:52,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:53,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878293685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:53,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:50:53,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 33 [2022-11-22 02:50:53,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80886089] [2022-11-22 02:50:53,863 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:50:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 02:50:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:50:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 02:50:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:50:53,865 INFO L87 Difference]: Start difference. First operand 615 states and 2185 transitions. Second operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:51:08,952 INFO L93 Difference]: Finished difference Result 2906 states and 10178 transitions. [2022-11-22 02:51:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 02:51:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:51:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:51:08,966 INFO L225 Difference]: With dead ends: 2906 [2022-11-22 02:51:08,966 INFO L226 Difference]: Without dead ends: 2906 [2022-11-22 02:51:08,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=753, Invalid=3537, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 02:51:08,968 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1692 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:51:08,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1692 Valid, 156 Invalid, 1905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-22 02:51:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-11-22 02:51:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 966. [2022-11-22 02:51:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 957 states have (on average 3.820271682340648) internal successors, (3656), 965 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3656 transitions. [2022-11-22 02:51:09,016 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3656 transitions. Word has length 10 [2022-11-22 02:51:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:51:09,017 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 3656 transitions. [2022-11-22 02:51:09,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3656 transitions. [2022-11-22 02:51:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:51:09,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:51:09,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:51:09,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:51:09,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-22 02:51:09,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-22 02:51:09,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:51:09,631 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:51:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:51:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash 520255631, now seen corresponding path program 1 times [2022-11-22 02:51:09,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:51:09,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053729046] [2022-11-22 02:51:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:51:09,632 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 [2022-11-22 02:51:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:51:09,633 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:51:09,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:51:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:51:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:51:09,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:09,895 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:51:09,896 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 [2022-11-22 02:51:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:10,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:51:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:10,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:51:10,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053729046] [2022-11-22 02:51:10,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053729046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:51:10,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [454852240] [2022-11-22 02:51:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:51:10,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:51:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:51:10,859 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:51:10,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-22 02:51:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:51:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:51:11,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:11,203 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:51:11,203 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 [2022-11-22 02:51:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:11,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:51:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:12,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [454852240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:51:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452160003] [2022-11-22 02:51:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:51:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:51:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:51:12,224 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:51:12,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-22 02:51:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:51:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:51:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:12,502 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:51:12,502 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 [2022-11-22 02:51:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:12,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:51:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:13,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452160003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:51:13,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:51:13,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-22 02:51:13,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50183897] [2022-11-22 02:51:13,011 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:51:13,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:51:13,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:51:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:51:13,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:51:13,012 INFO L87 Difference]: Start difference. First operand 966 states and 3656 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:51:23,754 INFO L93 Difference]: Finished difference Result 1961 states and 7495 transitions. [2022-11-22 02:51:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:51:23,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:51:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:51:23,764 INFO L225 Difference]: With dead ends: 1961 [2022-11-22 02:51:23,764 INFO L226 Difference]: Without dead ends: 1961 [2022-11-22 02:51:23,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:51:23,765 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 259 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:51:23,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 55 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-22 02:51:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-11-22 02:51:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1421. [2022-11-22 02:51:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1412 states have (on average 3.9242209631728047) internal successors, (5541), 1420 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 5541 transitions. [2022-11-22 02:51:23,814 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 5541 transitions. Word has length 10 [2022-11-22 02:51:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:51:23,815 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 5541 transitions. [2022-11-22 02:51:23,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 5541 transitions. [2022-11-22 02:51:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:51:23,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:51:23,817 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-22 02:51:23,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-22 02:51:24,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-22 02:51:24,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-22 02:51:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:51:24,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:51:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:51:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1565372680, now seen corresponding path program 2 times [2022-11-22 02:51:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:51:24,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85876049] [2022-11-22 02:51:24,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:51:24,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:51:24,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:51:24,442 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:51:24,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:51:24,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:51:24,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:51:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:51:24,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:24,769 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:51:24,769 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 [2022-11-22 02:51:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:25,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:51:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:26,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:51:26,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85876049] [2022-11-22 02:51:26,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85876049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:51:26,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1174807134] [2022-11-22 02:51:26,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:51:26,980 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:51:26,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:51:26,981 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:51:26,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-22 02:51:27,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:51:27,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:51:27,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:51:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:27,450 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:51:27,450 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 [2022-11-22 02:51:27,505 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 [2022-11-22 02:51:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:51:27,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:51:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:51:28,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1174807134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:51:28,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979750448] [2022-11-22 02:51:28,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:51:28,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:51:28,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:51:28,958 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:51:28,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-22 02:51:29,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:51:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:51:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:51:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:51:29,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:51:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:51:29,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979750448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:51:29,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:51:29,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-11-22 02:51:29,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727971214] [2022-11-22 02:51:29,995 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:51:29,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 02:51:29,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:51:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 02:51:29,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:51:29,998 INFO L87 Difference]: Start difference. First operand 1421 states and 5541 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:51:53,863 INFO L93 Difference]: Finished difference Result 2644 states and 9576 transitions. [2022-11-22 02:51:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 02:51:53,865 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:51:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:51:53,890 INFO L225 Difference]: With dead ends: 2644 [2022-11-22 02:51:53,890 INFO L226 Difference]: Without dead ends: 2644 [2022-11-22 02:51:53,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=851, Invalid=2689, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:51:53,892 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1167 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:51:53,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 308 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2022-11-22 02:51:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2022-11-22 02:51:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1548. [2022-11-22 02:51:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1539 states have (on average 3.8382066276803117) internal successors, (5907), 1547 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5907 transitions. [2022-11-22 02:51:53,947 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5907 transitions. Word has length 11 [2022-11-22 02:51:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:51:53,948 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 5907 transitions. [2022-11-22 02:51:53,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:51:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5907 transitions. [2022-11-22 02:51:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:51:53,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:51:53,949 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-22 02:51:53,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-22 02:51:54,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-22 02:51:54,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:51:54,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:51:54,554 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:51:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:51:54,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1428947491, now seen corresponding path program 3 times [2022-11-22 02:51:54,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:51:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42630334] [2022-11-22 02:51:54,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:51:54,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:51:54,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:51:54,556 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:51:54,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:51:54,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:51:54,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:51:54,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:51:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:55,013 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:51:55,013 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 [2022-11-22 02:51:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:55,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:51:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:51:59,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:51:59,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42630334] [2022-11-22 02:51:59,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42630334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:51:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124946729] [2022-11-22 02:51:59,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:51:59,003 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:51:59,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:51:59,004 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:51:59,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-22 02:51:59,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:51:59,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:51:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:51:59,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:59,953 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:51:59,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:52:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:00,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:52:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:03,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124946729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:52:03,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217326977] [2022-11-22 02:52:03,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:52:03,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:52:03,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:52:03,885 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:52:03,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-22 02:52:06,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:52:06,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:52:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:52:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:52:06,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:52:06,208 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 [2022-11-22 02:52:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:06,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:52:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:06,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217326977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:52:06,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:52:06,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-22 02:52:06,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638348810] [2022-11-22 02:52:06,851 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:52:06,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 02:52:06,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:52:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 02:52:06,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:52:06,852 INFO L87 Difference]: Start difference. First operand 1548 states and 5907 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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) [2022-11-22 02:52:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:52:33,039 INFO L93 Difference]: Finished difference Result 11408 states and 44766 transitions. [2022-11-22 02:52:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:52:33,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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 12 [2022-11-22 02:52:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:52:33,165 INFO L225 Difference]: With dead ends: 11408 [2022-11-22 02:52:33,166 INFO L226 Difference]: Without dead ends: 11408 [2022-11-22 02:52:33,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:52:33,168 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4349 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 3042 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4349 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 3068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:52:33,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4349 Valid, 399 Invalid, 3068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3042 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-11-22 02:52:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11408 states. [2022-11-22 02:52:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11408 to 1560. [2022-11-22 02:52:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1551 states have (on average 3.8239845261121856) internal successors, (5931), 1559 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:52:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5931 transitions. [2022-11-22 02:52:33,418 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5931 transitions. Word has length 12 [2022-11-22 02:52:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:52:33,460 INFO L495 AbstractCegarLoop]: Abstraction has 1560 states and 5931 transitions. [2022-11-22 02:52:33,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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) [2022-11-22 02:52:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5931 transitions. [2022-11-22 02:52:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:52:33,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:52:33,462 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:52:33,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-22 02:52:33,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 02:52:33,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-22 02:52:34,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:52:34,063 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:52:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:52:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash -175840644, now seen corresponding path program 2 times [2022-11-22 02:52:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:52:34,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310020133] [2022-11-22 02:52:34,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:52:34,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:52:34,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:52:34,066 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:52:34,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:52:34,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:52:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:52:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:52:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:52:34,412 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:52:34,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-22 02:52:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:34,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:52:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:35,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:52:35,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310020133] [2022-11-22 02:52:35,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310020133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:52:35,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159294678] [2022-11-22 02:52:35,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:52:35,863 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:52:35,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:52:35,864 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:52:35,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-22 02:52:36,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:52:36,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:52:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:52:36,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:52:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:37,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:52:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:38,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159294678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:52:38,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837376498] [2022-11-22 02:52:38,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:52:38,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:52:38,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:52:38,336 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:52:38,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-22 02:52:38,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:52:38,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:52:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:52:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:52:38,703 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:52:38,703 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 [2022-11-22 02:52:39,839 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 [2022-11-22 02:52:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:40,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:52:40,101 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 [2022-11-22 02:52:40,125 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 [2022-11-22 02:52:40,141 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:52:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:52:43,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837376498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:52:43,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:52:43,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 48 [2022-11-22 02:52:43,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694085955] [2022-11-22 02:52:43,782 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:52:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 02:52:43,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:52:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 02:52:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:52:43,785 INFO L87 Difference]: Start difference. First operand 1560 states and 5931 transitions. Second operand has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:53:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:53:11,626 INFO L93 Difference]: Finished difference Result 2762 states and 9640 transitions. [2022-11-22 02:53:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-22 02:53:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:53:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:53:11,637 INFO L225 Difference]: With dead ends: 2762 [2022-11-22 02:53:11,637 INFO L226 Difference]: Without dead ends: 2762 [2022-11-22 02:53:11,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2022-11-22 02:53:11,639 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1687 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 4951 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 4951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:53:11,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1687 Valid, 391 Invalid, 5007 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 4951 Invalid, 0 Unknown, 0 Unchecked, 19.8s Time] [2022-11-22 02:53:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-11-22 02:53:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1816. [2022-11-22 02:53:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1807 states have (on average 3.923076923076923) internal successors, (7089), 1815 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:53:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 7089 transitions. [2022-11-22 02:53:11,710 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 7089 transitions. Word has length 12 [2022-11-22 02:53:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:53:11,711 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 7089 transitions. [2022-11-22 02:53:11,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:53:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 7089 transitions. [2022-11-22 02:53:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:53:11,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:53:11,712 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:53:11,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-22 02:53:11,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-22 02:53:12,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-22 02:53:12,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:53:12,320 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:53:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:53:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash -916013975, now seen corresponding path program 1 times [2022-11-22 02:53:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:53:12,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735146868] [2022-11-22 02:53:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:53:12,321 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 [2022-11-22 02:53:12,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:53:12,322 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:53:12,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:53:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:53:12,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:53:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:53:12,659 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:53:12,659 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 [2022-11-22 02:53:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:13,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:53:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:15,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:53:15,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735146868] [2022-11-22 02:53:15,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735146868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:53:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [77495951] [2022-11-22 02:53:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:53:15,468 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:53:15,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:53:15,469 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:53:15,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-22 02:53:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:53:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:53:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:53:15,923 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:53:15,924 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 [2022-11-22 02:53:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:16,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:53:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:18,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [77495951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:53:18,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709952692] [2022-11-22 02:53:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:53:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:53:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:53:18,684 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:53:18,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-22 02:53:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:53:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:53:18,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:53:19,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:53:19,017 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 [2022-11-22 02:53:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:19,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:53:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:20,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709952692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:53:20,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:53:20,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 20 [2022-11-22 02:53:20,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020662523] [2022-11-22 02:53:20,146 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:53:20,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:53:20,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:53:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:53:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:53:20,147 INFO L87 Difference]: Start difference. First operand 1816 states and 7089 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:53:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:53:48,595 INFO L93 Difference]: Finished difference Result 3146 states and 12606 transitions. [2022-11-22 02:53:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:53:48,599 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:53:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:53:48,620 INFO L225 Difference]: With dead ends: 3146 [2022-11-22 02:53:48,620 INFO L226 Difference]: Without dead ends: 3146 [2022-11-22 02:53:48,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:53:48,621 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 606 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:53:48,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 127 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-22 02:53:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-11-22 02:53:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2412. [2022-11-22 02:53:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2403 states have (on average 4.1610486891385765) internal successors, (9999), 2411 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:53:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 9999 transitions. [2022-11-22 02:53:48,773 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 9999 transitions. Word has length 12 [2022-11-22 02:53:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:53:48,773 INFO L495 AbstractCegarLoop]: Abstraction has 2412 states and 9999 transitions. [2022-11-22 02:53:48,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:53:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 9999 transitions. [2022-11-22 02:53:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:53:48,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:53:48,775 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:53:48,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:53:48,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-22 02:53:49,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-22 02:53:49,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:53:49,391 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:53:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:53:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1749585839, now seen corresponding path program 2 times [2022-11-22 02:53:49,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:53:49,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073932973] [2022-11-22 02:53:49,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:53:49,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:53:49,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:53:49,393 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:53:49,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:53:49,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:53:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:53:49,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:53:49,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:53:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:49,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:53:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:50,367 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:53:50,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073932973] [2022-11-22 02:53:50,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073932973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:53:50,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928783823] [2022-11-22 02:53:50,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:53:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:53:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:53:50,368 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:53:50,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-22 02:53:50,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:53:50,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:53:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:53:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:53:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:50,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:53:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:51,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928783823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:53:51,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220680646] [2022-11-22 02:53:51,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:53:51,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:53:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:53:51,015 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:53:51,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-22 02:53:51,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:53:51,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:53:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:53:51,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:53:51,492 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:53:51,493 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 [2022-11-22 02:53:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:52,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:53:52,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-22 02:53:52,182 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 [2022-11-22 02:53:52,187 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:53:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:53:53,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220680646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:53:53,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:53:53,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 23 [2022-11-22 02:53:53,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384177199] [2022-11-22 02:53:53,326 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:53:53,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:53:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:53:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:53:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:53:53,327 INFO L87 Difference]: Start difference. First operand 2412 states and 9999 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:54:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:54:02,943 INFO L93 Difference]: Finished difference Result 2516 states and 10168 transitions. [2022-11-22 02:54:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:54:02,944 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:54:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:54:02,950 INFO L225 Difference]: With dead ends: 2516 [2022-11-22 02:54:02,950 INFO L226 Difference]: Without dead ends: 2516 [2022-11-22 02:54:02,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:54:02,951 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 371 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:54:02,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 146 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-22 02:54:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-11-22 02:54:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2410. [2022-11-22 02:54:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2401 states have (on average 4.14618908788005) internal successors, (9955), 2409 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:54:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 9955 transitions. [2022-11-22 02:54:03,007 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 9955 transitions. Word has length 12 [2022-11-22 02:54:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:54:03,007 INFO L495 AbstractCegarLoop]: Abstraction has 2410 states and 9955 transitions. [2022-11-22 02:54:03,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:54:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 9955 transitions. [2022-11-22 02:54:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:54:03,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:54:03,009 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:54:03,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:54:03,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-22 02:54:03,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-22 02:54:03,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:54:03,622 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:54:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:54:03,622 INFO L85 PathProgramCache]: Analyzing trace with hash -251960978, now seen corresponding path program 2 times [2022-11-22 02:54:03,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:54:03,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232835708] [2022-11-22 02:54:03,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:54:03,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:54:03,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:54:03,623 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:54:03,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:54:03,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 02:54:03,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:54:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:54:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:54:03,962 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:54:03,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:54:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:54:04,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:54:04,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:54:04,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232835708] [2022-11-22 02:54:04,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232835708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:54:04,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:54:04,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:54:04,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822165778] [2022-11-22 02:54:04,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:54:04,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:54:04,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:54:04,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:54:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:54:04,241 INFO L87 Difference]: Start difference. First operand 2410 states and 9955 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:54:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:54:04,654 INFO L93 Difference]: Finished difference Result 2538 states and 10103 transitions. [2022-11-22 02:54:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:54:04,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 02:54:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:54:04,661 INFO L225 Difference]: With dead ends: 2538 [2022-11-22 02:54:04,661 INFO L226 Difference]: Without dead ends: 2538 [2022-11-22 02:54:04,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:54:04,662 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:54:04,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:54:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2022-11-22 02:54:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2476. [2022-11-22 02:54:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2467 states have (on average 4.0279691933522495) internal successors, (9937), 2475 states have internal predecessors, (9937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:54:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 9937 transitions. [2022-11-22 02:54:04,735 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 9937 transitions. Word has length 13 [2022-11-22 02:54:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:54:04,735 INFO L495 AbstractCegarLoop]: Abstraction has 2476 states and 9937 transitions. [2022-11-22 02:54:04,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:54:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 9937 transitions. [2022-11-22 02:54:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:54:04,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:54:04,737 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-22 02:54:04,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-22 02:54:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:54:04,949 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:54:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:54:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1363153569, now seen corresponding path program 3 times [2022-11-22 02:54:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:54:04,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702997923] [2022-11-22 02:54:04,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:54:04,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:54:04,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:54:04,951 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:54:04,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:54:05,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:54:05,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:54:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:54:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:54:05,441 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:54:05,442 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 [2022-11-22 02:54:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:54:06,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:54:06,180 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 [2022-11-22 02:54:06,216 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 [2022-11-22 02:54:06,223 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:54:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:54:08,947 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:54:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702997923] [2022-11-22 02:54:08,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702997923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:54:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [44149742] [2022-11-22 02:54:08,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:54:08,948 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:54:08,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:54:08,949 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:54:08,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-22 02:54:09,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:54:09,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:54:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:54:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:54:10,039 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:54:10,040 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 [2022-11-22 02:54:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:54:10,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:54:10,326 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 [2022-11-22 02:54:10,357 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 [2022-11-22 02:54:10,362 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:54:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:54:12,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [44149742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:54:12,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230164473] [2022-11-22 02:54:12,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:54:12,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:54:12,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:54:12,158 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:54:12,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-22 02:54:12,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:54:12,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:54:12,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:54:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:54:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:54:14,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:54:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:54:16,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230164473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:54:16,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:54:16,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 43 [2022-11-22 02:54:16,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301874852] [2022-11-22 02:54:16,033 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:54:16,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-22 02:54:16,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:54:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-22 02:54:16,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:54:16,034 INFO L87 Difference]: Start difference. First operand 2476 states and 9937 transitions. Second operand has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:55:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:55:18,805 INFO L93 Difference]: Finished difference Result 5962 states and 22802 transitions. [2022-11-22 02:55:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 02:55:18,808 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:55:18,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:55:18,825 INFO L225 Difference]: With dead ends: 5962 [2022-11-22 02:55:18,825 INFO L226 Difference]: Without dead ends: 5962 [2022-11-22 02:55:18,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=1111, Invalid=6029, Unknown=0, NotChecked=0, Total=7140 [2022-11-22 02:55:18,827 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1749 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 4915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:55:18,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 739 Invalid, 4915 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [66 Valid, 4849 Invalid, 0 Unknown, 0 Unchecked, 29.7s Time] [2022-11-22 02:55:18,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2022-11-22 02:55:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 3172. [2022-11-22 02:55:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3172 states, 3163 states have (on average 4.036674043629466) internal successors, (12768), 3171 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:55:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 12768 transitions. [2022-11-22 02:55:18,938 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 12768 transitions. Word has length 13 [2022-11-22 02:55:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:55:18,938 INFO L495 AbstractCegarLoop]: Abstraction has 3172 states and 12768 transitions. [2022-11-22 02:55:18,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:55:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 12768 transitions. [2022-11-22 02:55:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:55:18,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:55:18,941 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:55:18,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-22 02:55:19,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-22 02:55:19,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 02:55:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:55:19,547 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:55:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:55:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash 620316312, now seen corresponding path program 3 times [2022-11-22 02:55:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:55:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349541887] [2022-11-22 02:55:19,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:55:19,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:55:19,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:55:19,550 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:55:19,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:55:19,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:55:19,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:55:19,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:55:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:55:20,030 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 02:55:20,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-22 02:55:20,357 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 34 treesize of output 10 [2022-11-22 02:55:20,366 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 [2022-11-22 02:55:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:55:20,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:55:20,582 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 [2022-11-22 02:55:20,613 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 [2022-11-22 02:55:20,625 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:55:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:55:23,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:55:23,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349541887] [2022-11-22 02:55:23,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349541887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:55:23,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1315856681] [2022-11-22 02:55:23,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:55:23,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:55:23,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:55:23,084 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:55:23,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-22 02:55:23,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:55:23,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:55:23,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:55:23,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:55:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:55:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:55:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:55:27,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1315856681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:55:27,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680245107] [2022-11-22 02:55:27,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:55:27,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:55:27,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:55:27,532 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:55:27,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-22 02:55:27,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:55:27,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:55:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:55:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:55:27,991 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:55:27,991 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 [2022-11-22 02:55:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:55:30,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:55:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:55:33,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680245107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:55:33,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:55:33,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 10, 10] total 60 [2022-11-22 02:55:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647768143] [2022-11-22 02:55:33,870 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:55:33,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-22 02:55:33,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:55:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-22 02:55:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=3485, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 02:55:33,873 INFO L87 Difference]: Start difference. First operand 3172 states and 12768 transitions. Second operand has 62 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:56:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:56:21,180 INFO L93 Difference]: Finished difference Result 6172 states and 22603 transitions. [2022-11-22 02:56:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-22 02:56:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:56:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:56:21,221 INFO L225 Difference]: With dead ends: 6172 [2022-11-22 02:56:21,221 INFO L226 Difference]: Without dead ends: 6172 [2022-11-22 02:56:21,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=1414, Invalid=8888, Unknown=0, NotChecked=0, Total=10302 [2022-11-22 02:56:21,223 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3382 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 9037 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3382 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 9135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 9037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:56:21,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3382 Valid, 705 Invalid, 9135 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [98 Valid, 9037 Invalid, 0 Unknown, 0 Unchecked, 29.7s Time] [2022-11-22 02:56:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6172 states. [2022-11-22 02:56:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6172 to 3890. [2022-11-22 02:56:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3881 states have (on average 4.18191187838186) internal successors, (16230), 3889 states have internal predecessors, (16230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:56:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 16230 transitions. [2022-11-22 02:56:21,304 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 16230 transitions. Word has length 14 [2022-11-22 02:56:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:56:21,305 INFO L495 AbstractCegarLoop]: Abstraction has 3890 states and 16230 transitions. [2022-11-22 02:56:21,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:56:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 16230 transitions. [2022-11-22 02:56:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:56:21,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:56:21,306 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:56:21,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:56:21,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-22 02:56:21,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-22 02:56:21,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:56:21,907 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:56:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:56:21,908 INFO L85 PathProgramCache]: Analyzing trace with hash -850219121, now seen corresponding path program 3 times [2022-11-22 02:56:21,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:56:21,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950760428] [2022-11-22 02:56:21,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:56:21,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:56:21,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:56:21,909 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:56:21,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:56:22,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:56:22,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:56:22,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:56:22,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:56:22,371 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:56:22,371 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 [2022-11-22 02:56:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:56:22,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:56:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:56:25,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:56:25,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950760428] [2022-11-22 02:56:25,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950760428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:56:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [257922091] [2022-11-22 02:56:25,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:56:25,384 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:56:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:56:25,385 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:56:25,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-22 02:56:25,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:56:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:56:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:56:25,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:56:26,005 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:56:26,006 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 [2022-11-22 02:56:26,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-11-22 02:56:26,667 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 [2022-11-22 02:56:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:56:26,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:56:27,214 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 [2022-11-22 02:56:27,271 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:56:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:56:30,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [257922091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:56:30,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744938082] [2022-11-22 02:56:30,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:56:30,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:56:30,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:56:30,290 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:56:30,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-22 02:56:30,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:56:30,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:56:30,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:56:30,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:56:30,734 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:56:30,734 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 [2022-11-22 02:56:31,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-11-22 02:56:31,239 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 [2022-11-22 02:56:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:56:31,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:56:31,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-22 02:56:31,554 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:56:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:56:34,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744938082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:56:34,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:56:34,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 17 [2022-11-22 02:56:34,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437108012] [2022-11-22 02:56:34,341 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:56:34,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 02:56:34,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:56:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 02:56:34,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:56:34,343 INFO L87 Difference]: Start difference. First operand 3890 states and 16230 transitions. Second operand has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:56:38,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:56:40,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:56:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:56:41,219 INFO L93 Difference]: Finished difference Result 4170 states and 17186 transitions. [2022-11-22 02:56:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:56:41,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:56:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:56:41,231 INFO L225 Difference]: With dead ends: 4170 [2022-11-22 02:56:41,231 INFO L226 Difference]: Without dead ends: 4170 [2022-11-22 02:56:41,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:56:41,232 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 272 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:56:41,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 28 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 241 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-22 02:56:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2022-11-22 02:56:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 2762. [2022-11-22 02:56:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2757 states have (on average 4.022488211824447) internal successors, (11090), 2761 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:56:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 11090 transitions. [2022-11-22 02:56:41,326 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 11090 transitions. Word has length 14 [2022-11-22 02:56:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:56:41,327 INFO L495 AbstractCegarLoop]: Abstraction has 2762 states and 11090 transitions. [2022-11-22 02:56:41,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:56:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 11090 transitions. [2022-11-22 02:56:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:56:41,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:56:41,329 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2022-11-22 02:56:41,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-22 02:56:41,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:56:41,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-22 02:56:41,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:56:41,934 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:56:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:56:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash -500265160, now seen corresponding path program 4 times [2022-11-22 02:56:41,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:56:41,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741000988] [2022-11-22 02:56:41,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:56:41,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:56:41,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:56:41,937 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:56:41,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:56:42,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:56:42,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:56:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:56:42,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:56:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:56:42,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:56:44,454 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 38 treesize of output 32 [2022-11-22 02:56:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:56:45,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:56:45,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741000988] [2022-11-22 02:56:45,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741000988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:56:45,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267863027] [2022-11-22 02:56:45,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:56:45,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:56:45,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:56:45,688 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:56:45,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-22 02:56:46,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:56:46,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:56:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:56:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:56:46,242 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:56:46,242 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 [2022-11-22 02:56:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:56:48,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:56:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:56:51,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267863027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:56:51,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390231549] [2022-11-22 02:56:51,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:56:51,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:56:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:56:51,361 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:56:51,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-22 02:56:51,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:56:51,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:56:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:56:51,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:56:51,763 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:56:51,764 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 [2022-11-22 02:56:55,956 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 [2022-11-22 02:56:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:56:56,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:56:56,282 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 [2022-11-22 02:56:56,320 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 [2022-11-22 02:56:56,326 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:57:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:57:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390231549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:57:02,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:57:02,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 12, 12] total 69 [2022-11-22 02:57:02,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753527634] [2022-11-22 02:57:02,717 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:57:02,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-22 02:57:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:57:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-22 02:57:02,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=4451, Unknown=1, NotChecked=0, Total=4970 [2022-11-22 02:57:02,719 INFO L87 Difference]: Start difference. First operand 2762 states and 11090 transitions. Second operand has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:59:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:59:15,122 INFO L93 Difference]: Finished difference Result 13972 states and 51406 transitions. [2022-11-22 02:59:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-22 02:59:15,124 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have 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 [2022-11-22 02:59:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:59:15,166 INFO L225 Difference]: With dead ends: 13972 [2022-11-22 02:59:15,166 INFO L226 Difference]: Without dead ends: 13972 [2022-11-22 02:59:15,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6889 ImplicationChecksByTransitivity, 112.1s TimeCoverageRelationStatistics Valid=3721, Invalid=19840, Unknown=1, NotChecked=0, Total=23562 [2022-11-22 02:59:15,169 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 6730 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 9760 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6730 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 9876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 9760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:59:15,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6730 Valid, 1474 Invalid, 9876 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [116 Valid, 9760 Invalid, 0 Unknown, 0 Unchecked, 37.0s Time] [2022-11-22 02:59:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13972 states. [2022-11-22 02:59:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13972 to 2978. [2022-11-22 02:59:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2973 states have (on average 4.10427177934746) internal successors, (12202), 2977 states have internal predecessors, (12202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:59:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 12202 transitions. [2022-11-22 02:59:15,393 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 12202 transitions. Word has length 15 [2022-11-22 02:59:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:59:15,393 INFO L495 AbstractCegarLoop]: Abstraction has 2978 states and 12202 transitions. [2022-11-22 02:59:15,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:59:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 12202 transitions. [2022-11-22 02:59:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:59:15,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:59:15,396 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-11-22 02:59:15,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-22 02:59:15,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-22 02:59:15,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-22 02:59:16,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:59:16,010 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 02:59:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:59:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash -352728705, now seen corresponding path program 5 times [2022-11-22 02:59:16,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:59:16,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952116959] [2022-11-22 02:59:16,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:59:16,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:59:16,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:59:16,012 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:59:16,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 02:59:16,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:59:16,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:59:16,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:59:16,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:59:16,521 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:59:16,521 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 [2022-11-22 02:59:17,355 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 [2022-11-22 02:59:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:59:17,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:59:18,018 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 [2022-11-22 02:59:18,063 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 [2022-11-22 02:59:18,067 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 02:59:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:59:22,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:59:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952116959] [2022-11-22 02:59:22,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952116959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:59:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603887357] [2022-11-22 02:59:22,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:59:22,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:59:22,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:59:22,542 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:59:22,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-22 02:59:23,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:59:23,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:59:23,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:59:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:59:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:59:25,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:59:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:59:28,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603887357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:59:28,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859491639] [2022-11-22 02:59:28,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 02:59:28,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:59:28,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:59:28,312 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:59:28,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-22 02:59:29,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 02:59:29,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:59:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:59:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:59:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:59:31,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:59:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:59:33,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859491639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:59:33,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:59:33,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-11-22 02:59:33,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633773802] [2022-11-22 02:59:33,484 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:59:33,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-22 02:59:33,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:59:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-22 02:59:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=4353, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 02:59:33,486 INFO L87 Difference]: Start difference. First operand 2978 states and 12202 transitions. Second operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 03:00:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 03:00:36,741 INFO L93 Difference]: Finished difference Result 4706 states and 17854 transitions. [2022-11-22 03:00:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-22 03:00:36,743 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-11-22 03:00:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 03:00:36,754 INFO L225 Difference]: With dead ends: 4706 [2022-11-22 03:00:36,754 INFO L226 Difference]: Without dead ends: 4706 [2022-11-22 03:00:36,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4306 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=2305, Invalid=11975, Unknown=0, NotChecked=0, Total=14280 [2022-11-22 03:00:36,756 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3296 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 9383 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 9521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 9383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2022-11-22 03:00:36,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3296 Valid, 1691 Invalid, 9521 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [138 Valid, 9383 Invalid, 0 Unknown, 0 Unchecked, 30.8s Time] [2022-11-22 03:00:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2022-11-22 03:00:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 3109. [2022-11-22 03:00:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3104 states have (on average 3.868234536082474) internal successors, (12007), 3108 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) [2022-11-22 03:00:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 12007 transitions. [2022-11-22 03:00:36,859 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 12007 transitions. Word has length 15 [2022-11-22 03:00:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 03:00:36,860 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 12007 transitions. [2022-11-22 03:00:36,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 03:00:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 12007 transitions. [2022-11-22 03:00:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 03:00:36,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 03:00:36,864 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 03:00:36,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-22 03:00:37,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 03:00:37,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-11-22 03:00:37,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 03:00:37,474 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 03:00:37,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 03:00:37,474 INFO L85 PathProgramCache]: Analyzing trace with hash -220646980, now seen corresponding path program 4 times [2022-11-22 03:00:37,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 03:00:37,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954135387] [2022-11-22 03:00:37,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 03:00:37,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 03:00:37,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 03:00:37,476 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 03:00:37,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 03:00:37,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 03:00:37,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 03:00:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 03:00:37,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 03:00:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:00:38,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 03:00:39,565 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 38 treesize of output 32 [2022-11-22 03:00:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:00:40,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 03:00:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954135387] [2022-11-22 03:00:40,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954135387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 03:00:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1894723717] [2022-11-22 03:00:40,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 03:00:40,918 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 03:00:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 03:00:40,921 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 03:00:40,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-22 03:00:41,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 03:00:41,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 03:00:41,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 03:00:41,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 03:00:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:00:42,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 03:00:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:00:46,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1894723717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 03:00:46,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101817634] [2022-11-22 03:00:46,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 03:00:46,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 03:00:46,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 03:00:46,552 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 03:00:46,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-22 03:00:46,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 03:00:46,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 03:00:46,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 03:00:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 03:00:46,960 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 03:00:46,961 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 [2022-11-22 03:00:49,319 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 [2022-11-22 03:00:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:00:49,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 03:00:49,664 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 [2022-11-22 03:00:49,692 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 [2022-11-22 03:00:49,705 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 03:00:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:00:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101817634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 03:00:57,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 03:00:57,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 71 [2022-11-22 03:00:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354780883] [2022-11-22 03:00:57,703 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 03:00:57,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-22 03:00:57,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 03:00:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-22 03:00:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=4870, Unknown=0, NotChecked=0, Total=5256 [2022-11-22 03:00:57,705 INFO L87 Difference]: Start difference. First operand 3109 states and 12007 transitions. Second operand has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 03:03:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 03:03:50,269 INFO L93 Difference]: Finished difference Result 15201 states and 54548 transitions. [2022-11-22 03:03:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-22 03:03:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have 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 [2022-11-22 03:03:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 03:03:50,336 INFO L225 Difference]: With dead ends: 15201 [2022-11-22 03:03:50,336 INFO L226 Difference]: Without dead ends: 15201 [2022-11-22 03:03:50,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9253 ImplicationChecksByTransitivity, 122.4s TimeCoverageRelationStatistics Valid=4301, Invalid=29005, Unknown=0, NotChecked=0, Total=33306 [2022-11-22 03:03:50,339 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12257 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 14393 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12257 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 14742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 14393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.1s IncrementalHoareTripleChecker+Time [2022-11-22 03:03:50,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12257 Valid, 1215 Invalid, 14742 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [349 Valid, 14393 Invalid, 0 Unknown, 0 Unchecked, 66.1s Time] [2022-11-22 03:03:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15201 states. [2022-11-22 03:03:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15201 to 3115. [2022-11-22 03:03:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3110 states have (on average 3.887138263665595) internal successors, (12089), 3114 states have internal predecessors, (12089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 03:03:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 12089 transitions. [2022-11-22 03:03:50,710 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 12089 transitions. Word has length 16 [2022-11-22 03:03:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 03:03:50,711 INFO L495 AbstractCegarLoop]: Abstraction has 3115 states and 12089 transitions. [2022-11-22 03:03:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 03:03:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 12089 transitions. [2022-11-22 03:03:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 03:03:50,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 03:03:50,717 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 03:03:50,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-22 03:03:50,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-22 03:03:51,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 03:03:51,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 03:03:51,326 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-22 03:03:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 03:03:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1559922392, now seen corresponding path program 5 times [2022-11-22 03:03:51,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 03:03:51,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041633305] [2022-11-22 03:03:51,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 03:03:51,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 03:03:51,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 03:03:51,329 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 03:03:51,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 03:03:51,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 03:03:51,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 03:03:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 03:03:51,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 03:03:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:03:52,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 03:03:54,125 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 38 treesize of output 32 [2022-11-22 03:03:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:03:55,345 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 03:03:55,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041633305] [2022-11-22 03:03:55,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041633305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 03:03:55,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [462099954] [2022-11-22 03:03:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 03:03:55,346 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 03:03:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 03:03:55,347 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 03:03:55,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-22 03:03:56,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 03:03:56,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 03:03:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 03:03:56,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 03:03:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:03:58,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 03:04:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:04:03,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [462099954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 03:04:03,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752321085] [2022-11-22 03:04:03,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 03:04:03,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 03:04:03,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 [2022-11-22 03:04:03,318 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 03:04:03,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9492dcb2-afab-4016-831e-43aa0e849757/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-22 03:04:06,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 03:04:06,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 03:04:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 03:04:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 03:04:06,685 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 03:04:06,685 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 [2022-11-22 03:04:09,599 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 [2022-11-22 03:04:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:04:10,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 03:04:10,211 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 [2022-11-22 03:04:10,237 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 [2022-11-22 03:04:10,256 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 03:04:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 03:04:19,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752321085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 03:04:19,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 03:04:19,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 82 [2022-11-22 03:04:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958545233] [2022-11-22 03:04:19,195 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 03:04:19,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-22 03:04:19,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 03:04:19,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-22 03:04:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=6505, Unknown=0, NotChecked=0, Total=6972 [2022-11-22 03:04:19,197 INFO L87 Difference]: Start difference. First operand 3115 states and 12089 transitions. Second operand has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)