./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0 --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 20:16:14,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:16:14,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:16:14,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:16:14,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:16:14,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:16:14,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:16:14,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:16:14,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:16:14,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:16:14,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:16:14,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:16:14,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:16:14,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:16:14,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:16:14,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:16:14,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:16:14,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:16:14,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:16:14,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:16:14,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:16:14,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:16:14,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:16:14,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:16:14,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:16:14,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:16:14,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:16:14,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:16:14,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:16:14,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:16:14,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:16:14,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:16:14,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:16:14,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:16:14,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:16:14,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:16:14,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:16:14,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:16:14,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:16:14,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:16:14,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:16:14,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 20:16:15,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:16:15,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:16:15,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:16:15,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:16:15,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:16:15,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:16:15,038 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:16:15,038 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:16:15,038 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:16:15,039 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:16:15,040 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:16:15,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:16:15,041 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:16:15,041 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:16:15,041 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:16:15,041 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:16:15,042 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:16:15,042 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:16:15,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 20:16:15,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 20:16:15,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:16:15,043 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:16:15,043 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 20:16:15,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:16:15,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:16:15,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:16:15,044 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 20:16:15,045 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 20:16:15,045 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 20:16:15,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:16:15,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 20:16:15,046 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:16:15,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:16:15,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:16:15,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:16:15,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:16:15,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:16:15,047 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:16:15,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:16:15,048 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:16:15,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:16:15,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:16:15,049 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_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-11-16 20:16:15,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:16:15,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:16:15,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:16:15,331 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:16:15,332 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:16:15,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-16 20:16:15,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data/c7d6c2892/b2fc7fe8058949c19a1972d5d12796f4/FLAG46a6df4ff [2022-11-16 20:16:15,807 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:16:15,808 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-16 20:16:15,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data/c7d6c2892/b2fc7fe8058949c19a1972d5d12796f4/FLAG46a6df4ff [2022-11-16 20:16:16,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data/c7d6c2892/b2fc7fe8058949c19a1972d5d12796f4 [2022-11-16 20:16:16,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:16:16,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:16:16,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:16:16,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:16:16,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:16:16,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:16:16" (1/1) ... [2022-11-16 20:16:16,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24aa25c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:16, skipping insertion in model container [2022-11-16 20:16:16,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:16:16" (1/1) ... [2022-11-16 20:16:16,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:16:16,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:16:16,477 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-16 20:16:16,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:16:16,511 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-16 20:16:16,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66a3df0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:16, skipping insertion in model container [2022-11-16 20:16:16,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:16:16,513 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 20:16:16,515 INFO L158 Benchmark]: Toolchain (without parser) took 276.62ms. Allocated memory is still 132.1MB. Free memory was 86.9MB in the beginning and 105.0MB in the end (delta: -18.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 20:16:16,517 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 132.1MB. Free memory is still 103.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:16:16,519 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.88ms. Allocated memory is still 132.1MB. Free memory was 86.7MB in the beginning and 105.5MB in the end (delta: -18.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 20:16:16,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 132.1MB. Free memory is still 103.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.88ms. Allocated memory is still 132.1MB. Free memory was 86.7MB in the beginning and 105.5MB in the end (delta: -18.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 90]: 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_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0 --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 20:16:18,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:16:18,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:16:18,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:16:18,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:16:18,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:16:18,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:16:18,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:16:18,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:16:18,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:16:18,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:16:18,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:16:18,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:16:18,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:16:18,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:16:18,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:16:18,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:16:18,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:16:18,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:16:18,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:16:18,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:16:18,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:16:18,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:16:18,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:16:18,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:16:18,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:16:18,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:16:18,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:16:18,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:16:18,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:16:18,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:16:18,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:16:18,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:16:18,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:16:18,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:16:18,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:16:18,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:16:18,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:16:18,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:16:18,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:16:18,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:16:18,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-16 20:16:18,706 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:16:18,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:16:18,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:16:18,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:16:18,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:16:18,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:16:18,707 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:16:18,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:16:18,708 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:16:18,708 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:16:18,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:16:18,708 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:16:18,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 20:16:18,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 20:16:18,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:16:18,709 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:16:18,710 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 20:16:18,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:16:18,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:16:18,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:16:18,712 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 20:16:18,712 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 20:16:18,713 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 20:16:18,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:16:18,713 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 20:16:18,713 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 20:16:18,714 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 20:16:18,714 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:16:18,714 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:16:18,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:16:18,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 20:16:18,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:16:18,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:16:18,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:16:18,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:16:18,716 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 20:16:18,717 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 20:16:18,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:16:18,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 20:16:18,718 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_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-11-16 20:16:19,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:16:19,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:16:19,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:16:19,153 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:16:19,154 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:16:19,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-16 20:16:19,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data/6d6475bf9/a34f04a1e2bd45f3a0ffb560a87d4e0d/FLAGa8858fe2e [2022-11-16 20:16:19,714 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:16:19,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-16 20:16:19,727 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data/6d6475bf9/a34f04a1e2bd45f3a0ffb560a87d4e0d/FLAGa8858fe2e [2022-11-16 20:16:20,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/data/6d6475bf9/a34f04a1e2bd45f3a0ffb560a87d4e0d [2022-11-16 20:16:20,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:16:20,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:16:20,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:16:20,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:16:20,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:16:20,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f3eb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20, skipping insertion in model container [2022-11-16 20:16:20,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:16:20,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:16:20,288 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-16 20:16:20,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:16:20,357 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 20:16:20,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:16:20,372 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-16 20:16:20,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:16:20,384 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:16:20,403 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-16 20:16:20,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:16:20,424 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:16:20,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20 WrapperNode [2022-11-16 20:16:20,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:16:20,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:16:20,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:16:20,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:16:20,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,495 INFO L138 Inliner]: procedures = 28, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 134 [2022-11-16 20:16:20,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:16:20,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:16:20,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:16:20,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:16:20,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,553 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:16:20,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:16:20,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:16:20,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:16:20,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (1/1) ... [2022-11-16 20:16:20,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:16:20,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:16:20,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:16:20,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:16:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:16:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 20:16:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:16:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 20:16:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 20:16:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 20:16:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 20:16:20,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 20:16:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 20:16:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 20:16:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:16:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:16:20,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:16:20,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:16:20,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 20:16:20,654 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 20:16:20,765 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:16:20,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:16:21,208 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:16:21,455 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:16:21,455 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 20:16:21,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:16:21 BoogieIcfgContainer [2022-11-16 20:16:21,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:16:21,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:16:21,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:16:21,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:16:21,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:16:20" (1/3) ... [2022-11-16 20:16:21,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22eff71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:16:21, skipping insertion in model container [2022-11-16 20:16:21,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:20" (2/3) ... [2022-11-16 20:16:21,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22eff71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:16:21, skipping insertion in model container [2022-11-16 20:16:21,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:16:21" (3/3) ... [2022-11-16 20:16:21,470 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-11-16 20:16:21,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:16:21,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-16 20:16:21,499 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 20:16:21,614 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 20:16:21,646 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 20:16:21,660 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 133 transitions, 282 flow [2022-11-16 20:16:21,663 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 133 transitions, 282 flow [2022-11-16 20:16:21,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 133 transitions, 282 flow [2022-11-16 20:16:21,757 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-11-16 20:16:21,757 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 20:16:21,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 9/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2022-11-16 20:16:21,766 INFO L119 LiptonReduction]: Number of co-enabled transitions 840 [2022-11-16 20:16:39,321 INFO L134 LiptonReduction]: Checked pairs total: 1195 [2022-11-16 20:16:39,321 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-11-16 20:16:39,329 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 86 flow [2022-11-16 20:16:39,354 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:39,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:16:39,377 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;@196b03f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:16:39,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-16 20:16:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:16:39,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:39,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:16:39,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash 20076, now seen corresponding path program 1 times [2022-11-16 20:16:39,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:39,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731697825] [2022-11-16 20:16:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:39,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:39,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:39,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:39,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 20:16:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:16:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:39,787 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:39,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:39,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:39,824 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:39,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731697825] [2022-11-16 20:16:39,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731697825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:39,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:39,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:16:39,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113666339] [2022-11-16 20:16:39,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:39,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:16:39,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:39,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:16:39,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:39,860 INFO L87 Difference]: Start difference. First operand has 150 states, 106 states have (on average 3.452830188679245) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:40,221 INFO L93 Difference]: Finished difference Result 296 states and 728 transitions. [2022-11-16 20:16:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:16:40,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 20:16:40,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:40,242 INFO L225 Difference]: With dead ends: 296 [2022-11-16 20:16:40,243 INFO L226 Difference]: Without dead ends: 296 [2022-11-16 20:16:40,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:40,248 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:40,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 4 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:16:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-16 20:16:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 150. [2022-11-16 20:16:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 107 states have (on average 3.457943925233645) internal successors, (370), 149 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 370 transitions. [2022-11-16 20:16:40,329 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 370 transitions. Word has length 2 [2022-11-16 20:16:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:40,331 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 370 transitions. [2022-11-16 20:16:40,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 370 transitions. [2022-11-16 20:16:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:16:40,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:40,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:16:40,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:40,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:40,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash 20078, now seen corresponding path program 1 times [2022-11-16 20:16:40,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:40,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205040464] [2022-11-16 20:16:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:40,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:40,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 20:16:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:40,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:16:40,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:40,677 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 20:16:40,677 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 20:16:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:40,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:40,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205040464] [2022-11-16 20:16:40,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205040464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:40,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:40,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:16:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812899851] [2022-11-16 20:16:40,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:40,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:16:40,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:40,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:16:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:40,706 INFO L87 Difference]: Start difference. First operand 150 states and 370 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:40,852 INFO L93 Difference]: Finished difference Result 149 states and 368 transitions. [2022-11-16 20:16:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:16:40,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 20:16:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:40,854 INFO L225 Difference]: With dead ends: 149 [2022-11-16 20:16:40,854 INFO L226 Difference]: Without dead ends: 149 [2022-11-16 20:16:40,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:40,856 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:40,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:16:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-16 20:16:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-16 20:16:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 107 states have (on average 3.439252336448598) internal successors, (368), 148 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 368 transitions. [2022-11-16 20:16:40,867 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 368 transitions. Word has length 2 [2022-11-16 20:16:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:40,868 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 368 transitions. [2022-11-16 20:16:40,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 368 transitions. [2022-11-16 20:16:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:16:40,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:40,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:16:40,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:41,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:41,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:41,081 INFO L85 PathProgramCache]: Analyzing trace with hash 20143, now seen corresponding path program 1 times [2022-11-16 20:16:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:41,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946351221] [2022-11-16 20:16:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:41,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:41,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:41,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:41,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 20:16:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:41,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:16:41,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:41,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:41,245 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 20:16:41,245 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-16 20:16:41,273 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 [2022-11-16 20:16:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:41,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:41,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:41,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946351221] [2022-11-16 20:16:41,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946351221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:41,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:41,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:16:41,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628788161] [2022-11-16 20:16:41,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:41,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:16:41,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:16:41,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:41,324 INFO L87 Difference]: Start difference. First operand 149 states and 368 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:41,441 INFO L93 Difference]: Finished difference Result 149 states and 367 transitions. [2022-11-16 20:16:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:16:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 20:16:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:41,444 INFO L225 Difference]: With dead ends: 149 [2022-11-16 20:16:41,444 INFO L226 Difference]: Without dead ends: 149 [2022-11-16 20:16:41,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:41,445 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:41,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-16 20:16:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-16 20:16:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-16 20:16:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 107 states have (on average 3.4299065420560746) internal successors, (367), 148 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2022-11-16 20:16:41,461 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 2 [2022-11-16 20:16:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:41,461 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2022-11-16 20:16:41,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2022-11-16 20:16:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 20:16:41,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:41,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 20:16:41,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:41,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:41,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:41,671 INFO L85 PathProgramCache]: Analyzing trace with hash 20145, now seen corresponding path program 1 times [2022-11-16 20:16:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:41,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350775772] [2022-11-16 20:16:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:41,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:41,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:41,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:41,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 20:16:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:16:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:41,792 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-16 20:16:41,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-16 20:16:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:41,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:41,821 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:41,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350775772] [2022-11-16 20:16:41,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350775772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:41,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:41,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:16:41,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827705459] [2022-11-16 20:16:41,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:41,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:16:41,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:16:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:41,824 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:41,950 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2022-11-16 20:16:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:16:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 20:16:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:41,952 INFO L225 Difference]: With dead ends: 123 [2022-11-16 20:16:41,952 INFO L226 Difference]: Without dead ends: 123 [2022-11-16 20:16:41,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:41,953 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:41,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:16:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-16 20:16:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-16 20:16:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 91 states have (on average 3.1868131868131866) internal successors, (290), 122 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 290 transitions. [2022-11-16 20:16:41,960 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 290 transitions. Word has length 2 [2022-11-16 20:16:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:41,961 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 290 transitions. [2022-11-16 20:16:41,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 290 transitions. [2022-11-16 20:16:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 20:16:41,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:41,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 20:16:41,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:42,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:42,178 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash 624545, now seen corresponding path program 1 times [2022-11-16 20:16:42,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:42,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991876949] [2022-11-16 20:16:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:42,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:42,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:42,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:42,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 20:16:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 20:16:42,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:42,328 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:42,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:42,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:42,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991876949] [2022-11-16 20:16:42,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991876949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1674112860] [2022-11-16 20:16:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:42,623 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:16:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:16:42,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:16:42,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-16 20:16:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:42,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 20:16:42,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:42,842 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:42,842 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:42,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:42,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1674112860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865716282] [2022-11-16 20:16:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:42,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:42,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:16:42,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:16:42,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:16:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:43,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:16:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:43,150 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:43,150 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:43,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:43,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865716282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:43,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:16:43,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-16 20:16:43,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164091614] [2022-11-16 20:16:43,373 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:16:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:16:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:16:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:16:43,374 INFO L87 Difference]: Start difference. First operand 123 states and 290 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:44,699 INFO L93 Difference]: Finished difference Result 482 states and 1148 transitions. [2022-11-16 20:16:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:16:44,700 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 [2022-11-16 20:16:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:44,704 INFO L225 Difference]: With dead ends: 482 [2022-11-16 20:16:44,704 INFO L226 Difference]: Without dead ends: 482 [2022-11-16 20:16:44,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:16:44,705 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 245 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:44,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 12 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 20:16:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-11-16 20:16:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 126. [2022-11-16 20:16:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 3.1808510638297873) internal successors, (299), 125 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 299 transitions. [2022-11-16 20:16:44,718 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 299 transitions. Word has length 3 [2022-11-16 20:16:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:44,718 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 299 transitions. [2022-11-16 20:16:44,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:44,719 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 299 transitions. [2022-11-16 20:16:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 20:16:44,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:44,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 20:16:44,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:44,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:45,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 20:16:45,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:45,331 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:45,331 INFO L85 PathProgramCache]: Analyzing trace with hash 624612, now seen corresponding path program 1 times [2022-11-16 20:16:45,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:45,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632619000] [2022-11-16 20:16:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:45,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:45,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:45,333 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:45,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 20:16:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:45,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:16:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:45,481 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 20:16:45,481 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 12 treesize of output 24 [2022-11-16 20:16:45,504 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 [2022-11-16 20:16:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:45,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:45,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632619000] [2022-11-16 20:16:45,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632619000] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 20:16:45,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:16:45,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-16 20:16:45,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962439895] [2022-11-16 20:16:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:45,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:16:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:16:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:16:45,704 INFO L87 Difference]: Start difference. First operand 126 states and 299 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:45,850 INFO L93 Difference]: Finished difference Result 100 states and 220 transitions. [2022-11-16 20:16:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:16:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 20:16:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:45,852 INFO L225 Difference]: With dead ends: 100 [2022-11-16 20:16:45,852 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 20:16:45,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:16:45,853 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:45,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:16:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 20:16:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-16 20:16:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 2.8205128205128207) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2022-11-16 20:16:45,859 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 3 [2022-11-16 20:16:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:45,859 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2022-11-16 20:16:45,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2022-11-16 20:16:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:16:45,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:45,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:16:45,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:46,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:46,072 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:46,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash 19373237, now seen corresponding path program 1 times [2022-11-16 20:16:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:46,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31581342] [2022-11-16 20:16:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:46,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:46,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:46,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:46,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 20:16:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:16:46,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:46,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:46,234 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 20:16:46,235 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-16 20:16:46,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 20:16:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:46,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:46,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31581342] [2022-11-16 20:16:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31581342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:46,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:46,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:16:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865832287] [2022-11-16 20:16:46,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:16:46,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:16:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:46,271 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:46,379 INFO L93 Difference]: Finished difference Result 90 states and 200 transitions. [2022-11-16 20:16:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:16:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 20:16:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:46,380 INFO L225 Difference]: With dead ends: 90 [2022-11-16 20:16:46,381 INFO L226 Difference]: Without dead ends: 90 [2022-11-16 20:16:46,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:46,381 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:46,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:16:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-16 20:16:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-16 20:16:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 2.7027027027027026) internal successors, (200), 89 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 200 transitions. [2022-11-16 20:16:46,386 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 200 transitions. Word has length 4 [2022-11-16 20:16:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:46,386 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 200 transitions. [2022-11-16 20:16:46,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 200 transitions. [2022-11-16 20:16:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:16:46,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:46,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:16:46,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:46,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:46,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash 19373239, now seen corresponding path program 1 times [2022-11-16 20:16:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:46,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009578570] [2022-11-16 20:16:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:46,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:46,604 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:46,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 20:16:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:46,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:16:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:46,713 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-16 20:16:46,714 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 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-16 20:16:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:46,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:46,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:46,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009578570] [2022-11-16 20:16:46,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009578570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:46,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:46,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:16:46,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001920277] [2022-11-16 20:16:46,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:46,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:16:46,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:46,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:16:46,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:46,738 INFO L87 Difference]: Start difference. First operand 90 states and 200 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:46,830 INFO L93 Difference]: Finished difference Result 80 states and 180 transitions. [2022-11-16 20:16:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:16:46,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 20:16:46,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:46,832 INFO L225 Difference]: With dead ends: 80 [2022-11-16 20:16:46,832 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 20:16:46,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:16:46,833 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:46,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 2 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:16:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 20:16:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-16 20:16:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 2.5714285714285716) internal successors, (180), 79 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 180 transitions. [2022-11-16 20:16:46,837 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 180 transitions. Word has length 4 [2022-11-16 20:16:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:46,837 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 180 transitions. [2022-11-16 20:16:46,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 180 transitions. [2022-11-16 20:16:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 20:16:46,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:46,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 20:16:46,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:47,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:47,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:47,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:47,039 INFO L85 PathProgramCache]: Analyzing trace with hash 600566891, now seen corresponding path program 1 times [2022-11-16 20:16:47,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:47,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791515095] [2022-11-16 20:16:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:47,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:47,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:47,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-16 20:16:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:47,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 20:16:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:47,181 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:47,181 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:47,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:47,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:47,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791515095] [2022-11-16 20:16:47,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791515095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:47,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:47,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:16:47,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379867758] [2022-11-16 20:16:47,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:47,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:16:47,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:47,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:16:47,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:16:47,272 INFO L87 Difference]: Start difference. First operand 80 states and 180 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:47,524 INFO L93 Difference]: Finished difference Result 128 states and 289 transitions. [2022-11-16 20:16:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:16:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 20:16:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:47,526 INFO L225 Difference]: With dead ends: 128 [2022-11-16 20:16:47,526 INFO L226 Difference]: Without dead ends: 128 [2022-11-16 20:16:47,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:16:47,527 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:47,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 4 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:16:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-16 20:16:47,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2022-11-16 20:16:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 2.841463414634146) internal successors, (233), 91 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2022-11-16 20:16:47,532 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 5 [2022-11-16 20:16:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:47,532 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2022-11-16 20:16:47,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2022-11-16 20:16:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 20:16:47,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:47,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 20:16:47,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 20:16:47,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:47,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:47,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash 600566890, now seen corresponding path program 1 times [2022-11-16 20:16:47,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:47,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345913911] [2022-11-16 20:16:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:47,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:47,746 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:47,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-16 20:16:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:16:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:47,861 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 20:16:47,861 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 20:16:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:47,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:47,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:47,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345913911] [2022-11-16 20:16:47,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345913911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:47,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:47,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:16:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369477221] [2022-11-16 20:16:47,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:16:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:16:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:16:47,905 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:48,019 INFO L93 Difference]: Finished difference Result 68 states and 161 transitions. [2022-11-16 20:16:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:16:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 20:16:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:48,020 INFO L225 Difference]: With dead ends: 68 [2022-11-16 20:16:48,020 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 20:16:48,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:16:48,021 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:48,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:16:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 20:16:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-16 20:16:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 2.5555555555555554) internal successors, (161), 67 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 161 transitions. [2022-11-16 20:16:48,025 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 161 transitions. Word has length 5 [2022-11-16 20:16:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:48,026 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 161 transitions. [2022-11-16 20:16:48,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 161 transitions. [2022-11-16 20:16:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 20:16:48,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:48,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 20:16:48,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:48,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:48,238 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:48,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1437706809, now seen corresponding path program 1 times [2022-11-16 20:16:48,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:48,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572235921] [2022-11-16 20:16:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:48,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:48,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:48,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:48,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 20:16:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:16:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:48,392 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:48,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:48,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:48,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572235921] [2022-11-16 20:16:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572235921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:48,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:16:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326080838] [2022-11-16 20:16:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:48,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:16:48,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:16:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:16:48,523 INFO L87 Difference]: Start difference. First operand 68 states and 161 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:48,657 INFO L93 Difference]: Finished difference Result 71 states and 166 transitions. [2022-11-16 20:16:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:16:48,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 20:16:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:48,658 INFO L225 Difference]: With dead ends: 71 [2022-11-16 20:16:48,658 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 20:16:48,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:16:48,659 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:48,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-11-16 20:16:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 20:16:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-16 20:16:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 2.515151515151515) internal successors, (166), 70 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 166 transitions. [2022-11-16 20:16:48,662 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 166 transitions. Word has length 6 [2022-11-16 20:16:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:48,662 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 166 transitions. [2022-11-16 20:16:48,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 166 transitions. [2022-11-16 20:16:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 20:16:48,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:48,663 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 20:16:48,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:48,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:48,871 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1428124588, now seen corresponding path program 2 times [2022-11-16 20:16:48,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:48,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843770222] [2022-11-16 20:16:48,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:16:48,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:48,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:48,873 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:48,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 20:16:48,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:16:48,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:16:48,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:16:48,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:49,041 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:49,041 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:49,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:50,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:50,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843770222] [2022-11-16 20:16:50,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843770222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:50,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1106886067] [2022-11-16 20:16:50,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:16:50,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:16:50,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:16:50,111 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:16:50,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-16 20:16:50,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:16:50,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:16:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:16:50,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:50,381 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:50,381 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:50,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:50,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1106886067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284601552] [2022-11-16 20:16:50,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:16:50,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:50,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:16:50,691 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:16:50,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 20:16:50,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:16:50,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:16:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:16:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:50,882 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:50,882 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:50,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:51,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284601552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:51,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:16:51,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-16 20:16:51,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290475673] [2022-11-16 20:16:51,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:16:51,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:16:51,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:16:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:16:51,188 INFO L87 Difference]: Start difference. First operand 71 states and 166 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:54,582 INFO L93 Difference]: Finished difference Result 621 states and 1508 transitions. [2022-11-16 20:16:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:16:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 20:16:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:54,587 INFO L225 Difference]: With dead ends: 621 [2022-11-16 20:16:54,587 INFO L226 Difference]: Without dead ends: 621 [2022-11-16 20:16:54,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 20:16:54,588 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 493 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:54,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 58 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 20:16:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-16 20:16:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 77. [2022-11-16 20:16:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 2.4722222222222223) internal successors, (178), 76 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 178 transitions. [2022-11-16 20:16:54,597 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 178 transitions. Word has length 6 [2022-11-16 20:16:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:54,597 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 178 transitions. [2022-11-16 20:16:54,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 178 transitions. [2022-11-16 20:16:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:16:54,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:54,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:16:54,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:54,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:55,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:55,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:55,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:55,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1619231842, now seen corresponding path program 1 times [2022-11-16 20:16:55,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:55,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802728794] [2022-11-16 20:16:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:55,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:55,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:55,204 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:55,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 20:16:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:16:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:55,382 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:55,382 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:55,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:55,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:55,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802728794] [2022-11-16 20:16:55,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802728794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:55,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:55,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:16:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672719367] [2022-11-16 20:16:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:55,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:16:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:16:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:16:55,523 INFO L87 Difference]: Start difference. First operand 77 states and 178 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:55,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:55,667 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2022-11-16 20:16:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:16:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 20:16:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:55,668 INFO L225 Difference]: With dead ends: 78 [2022-11-16 20:16:55,669 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 20:16:55,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:16:55,669 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:55,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-16 20:16:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 20:16:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-16 20:16:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 2.4657534246575343) internal successors, (180), 77 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 180 transitions. [2022-11-16 20:16:55,673 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 180 transitions. Word has length 7 [2022-11-16 20:16:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:55,673 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 180 transitions. [2022-11-16 20:16:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 180 transitions. [2022-11-16 20:16:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:16:55,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:55,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:16:55,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:55,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:55,883 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1622950912, now seen corresponding path program 2 times [2022-11-16 20:16:55,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:55,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892516460] [2022-11-16 20:16:55,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:16:55,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:55,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:55,885 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:55,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 20:16:55,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:16:55,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:16:56,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:16:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:56,076 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:56,077 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:56,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:56,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:56,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892516460] [2022-11-16 20:16:56,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892516460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:56,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:56,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:16:56,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584544208] [2022-11-16 20:16:56,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:56,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:16:56,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:16:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:16:56,244 INFO L87 Difference]: Start difference. First operand 78 states and 180 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:56,388 INFO L93 Difference]: Finished difference Result 80 states and 184 transitions. [2022-11-16 20:16:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:16:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 20:16:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:56,389 INFO L225 Difference]: With dead ends: 80 [2022-11-16 20:16:56,389 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 20:16:56,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:16:56,390 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:56,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-11-16 20:16:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 20:16:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-11-16 20:16:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 2.4594594594594597) internal successors, (182), 78 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 182 transitions. [2022-11-16 20:16:56,393 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 182 transitions. Word has length 7 [2022-11-16 20:16:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:56,393 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 182 transitions. [2022-11-16 20:16:56,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 182 transitions. [2022-11-16 20:16:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:16:56,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:56,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:16:56,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:56,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:56,605 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1622971022, now seen corresponding path program 1 times [2022-11-16 20:16:56,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:56,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421480723] [2022-11-16 20:16:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:56,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:56,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:56,607 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:56,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 20:16:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:56,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 20:16:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:56,772 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:56,772 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:56,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:56,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:56,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421480723] [2022-11-16 20:16:56,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421480723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:56,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:56,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:16:56,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488557729] [2022-11-16 20:16:56,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:56,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:16:56,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:56,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:16:56,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:16:56,875 INFO L87 Difference]: Start difference. First operand 79 states and 182 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:57,077 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2022-11-16 20:16:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:16:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 20:16:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:57,078 INFO L225 Difference]: With dead ends: 105 [2022-11-16 20:16:57,079 INFO L226 Difference]: Without dead ends: 105 [2022-11-16 20:16:57,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:16:57,079 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:57,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 4 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:16:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-16 20:16:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2022-11-16 20:16:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 2.616279069767442) internal successors, (225), 90 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 225 transitions. [2022-11-16 20:16:57,084 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 225 transitions. Word has length 7 [2022-11-16 20:16:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:57,084 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 225 transitions. [2022-11-16 20:16:57,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:16:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 225 transitions. [2022-11-16 20:16:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:16:57,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:57,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:16:57,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:57,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:57,291 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:16:57,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:57,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1331773678, now seen corresponding path program 1 times [2022-11-16 20:16:57,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:16:57,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655023610] [2022-11-16 20:16:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:57,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:16:57,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:16:57,293 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:16:57,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 20:16:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:16:57,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:57,478 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:16:57,478 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:16:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:16:57,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:16:58,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:16:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655023610] [2022-11-16 20:16:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655023610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1571962302] [2022-11-16 20:16:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:58,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:16:58,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:16:58,067 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:16:58,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-16 20:16:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:16:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:58,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1571962302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994267656] [2022-11-16 20:16:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:58,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:16:58,675 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:16:58,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 20:16:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:58,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:16:58,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:58,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:58,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994267656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:16:58,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:16:58,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-16 20:16:58,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342738351] [2022-11-16 20:16:58,853 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:16:58,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 20:16:58,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:16:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 20:16:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:16:58,855 INFO L87 Difference]: Start difference. First operand 91 states and 225 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) [2022-11-16 20:17:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:02,420 INFO L93 Difference]: Finished difference Result 308 states and 724 transitions. [2022-11-16 20:17:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 20:17:02,421 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 [2022-11-16 20:17:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:02,423 INFO L225 Difference]: With dead ends: 308 [2022-11-16 20:17:02,423 INFO L226 Difference]: Without dead ends: 308 [2022-11-16 20:17:02,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 20:17:02,424 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 645 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:02,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 50 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 20:17:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-16 20:17:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 190. [2022-11-16 20:17:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 2.7621621621621624) internal successors, (511), 189 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 511 transitions. [2022-11-16 20:17:02,433 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 511 transitions. Word has length 7 [2022-11-16 20:17:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:02,433 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 511 transitions. [2022-11-16 20:17:02,434 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) [2022-11-16 20:17:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 511 transitions. [2022-11-16 20:17:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 20:17:02,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:02,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:02,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:02,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 20:17:02,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-16 20:17:03,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:17:03,041 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:17:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1227503352, now seen corresponding path program 1 times [2022-11-16 20:17:03,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:17:03,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356582331] [2022-11-16 20:17:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:03,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:03,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:17:03,043 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:17:03,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 20:17:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:17:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:03,215 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:03,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:03,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:17:03,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:17:03,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356582331] [2022-11-16 20:17:03,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356582331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:17:03,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:17:03,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:17:03,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261759354] [2022-11-16 20:17:03,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:17:03,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:17:03,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:17:03,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:17:03,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:17:03,356 INFO L87 Difference]: Start difference. First operand 190 states and 511 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:03,500 INFO L93 Difference]: Finished difference Result 190 states and 509 transitions. [2022-11-16 20:17:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:17:03,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 20:17:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:03,502 INFO L225 Difference]: With dead ends: 190 [2022-11-16 20:17:03,502 INFO L226 Difference]: Without dead ends: 190 [2022-11-16 20:17:03,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:17:03,503 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:03,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-16 20:17:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-16 20:17:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-11-16 20:17:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 2.7513513513513512) internal successors, (509), 189 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 509 transitions. [2022-11-16 20:17:03,509 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 509 transitions. Word has length 8 [2022-11-16 20:17:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:03,510 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 509 transitions. [2022-11-16 20:17:03,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 509 transitions. [2022-11-16 20:17:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:17:03,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:03,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:03,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:03,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:03,712 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:17:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash 605144874, now seen corresponding path program 1 times [2022-11-16 20:17:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:17:03,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136250282] [2022-11-16 20:17:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:03,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:17:03,714 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:17:03,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 20:17:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:17:03,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:03,901 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:03,901 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:04,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:17:04,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:17:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136250282] [2022-11-16 20:17:04,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136250282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:17:04,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:17:04,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:17:04,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237578333] [2022-11-16 20:17:04,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:17:04,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:17:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:17:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:17:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:17:04,063 INFO L87 Difference]: Start difference. First operand 190 states and 509 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:04,189 INFO L93 Difference]: Finished difference Result 192 states and 514 transitions. [2022-11-16 20:17:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:17:04,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 20:17:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:04,190 INFO L225 Difference]: With dead ends: 192 [2022-11-16 20:17:04,190 INFO L226 Difference]: Without dead ends: 192 [2022-11-16 20:17:04,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:17:04,191 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:04,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-16 20:17:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-16 20:17:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-16 20:17:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 2.748663101604278) internal successors, (514), 191 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 514 transitions. [2022-11-16 20:17:04,198 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 514 transitions. Word has length 9 [2022-11-16 20:17:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:04,199 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 514 transitions. [2022-11-16 20:17:04,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 514 transitions. [2022-11-16 20:17:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:17:04,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:04,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:04,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 20:17:04,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:04,410 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:17:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash 602088894, now seen corresponding path program 2 times [2022-11-16 20:17:04,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:17:04,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120607821] [2022-11-16 20:17:04,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:17:04,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:04,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:17:04,412 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:17:04,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 20:17:04,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:17:04,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:17:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:17:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:04,593 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:04,594 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:04,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:17:04,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:17:04,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120607821] [2022-11-16 20:17:04,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120607821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:17:04,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:17:04,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:17:04,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713412173] [2022-11-16 20:17:04,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:17:04,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:17:04,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:17:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:17:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:17:04,777 INFO L87 Difference]: Start difference. First operand 192 states and 514 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:04,927 INFO L93 Difference]: Finished difference Result 192 states and 512 transitions. [2022-11-16 20:17:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:17:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 20:17:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:04,929 INFO L225 Difference]: With dead ends: 192 [2022-11-16 20:17:04,929 INFO L226 Difference]: Without dead ends: 192 [2022-11-16 20:17:04,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:17:04,930 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:04,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-16 20:17:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-16 20:17:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2022-11-16 20:17:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 2.7405405405405405) internal successors, (507), 189 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 507 transitions. [2022-11-16 20:17:04,940 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 507 transitions. Word has length 9 [2022-11-16 20:17:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:04,940 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 507 transitions. [2022-11-16 20:17:04,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 507 transitions. [2022-11-16 20:17:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:17:04,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:04,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:04,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:05,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:05,155 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:17:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash 49972861, now seen corresponding path program 1 times [2022-11-16 20:17:05,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:17:05,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340665418] [2022-11-16 20:17:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:05,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:05,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:17:05,157 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:17:05,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 20:17:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:05,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:17:05,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:05,324 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:05,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:05,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:05,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:17:05,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340665418] [2022-11-16 20:17:05,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340665418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [643031019] [2022-11-16 20:17:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:05,965 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:17:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:17:05,966 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:17:05,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-16 20:17:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:06,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:17:06,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:06,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:06,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [643031019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:06,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261981834] [2022-11-16 20:17:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:06,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:17:06,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:17:06,641 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:17:06,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 20:17:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:17:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:06,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:06,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261981834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:06,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:17:06,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-16 20:17:06,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635655543] [2022-11-16 20:17:06,856 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:17:06,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 20:17:06,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:17:06,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 20:17:06,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:17:06,857 INFO L87 Difference]: Start difference. First operand 190 states and 507 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:10,469 INFO L93 Difference]: Finished difference Result 352 states and 864 transitions. [2022-11-16 20:17:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 20:17:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 9 [2022-11-16 20:17:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:10,473 INFO L225 Difference]: With dead ends: 352 [2022-11-16 20:17:10,473 INFO L226 Difference]: Without dead ends: 352 [2022-11-16 20:17:10,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 20:17:10,474 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 452 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:10,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 64 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 20:17:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-16 20:17:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 248. [2022-11-16 20:17:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 2.905349794238683) internal successors, (706), 247 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 706 transitions. [2022-11-16 20:17:10,484 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 706 transitions. Word has length 9 [2022-11-16 20:17:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:10,485 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 706 transitions. [2022-11-16 20:17:10,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:10,485 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 706 transitions. [2022-11-16 20:17:10,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:17:10,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:10,486 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-16 20:17:10,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:10,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-16 20:17:10,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:11,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:11,089 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:17:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1553077579, now seen corresponding path program 2 times [2022-11-16 20:17:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:17:11,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96412842] [2022-11-16 20:17:11,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:17:11,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:17:11,091 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:17:11,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 20:17:11,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:17:11,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:17:11,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:17:11,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:11,302 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:11,302 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:13,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:17:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96412842] [2022-11-16 20:17:13,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96412842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [271607045] [2022-11-16 20:17:13,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:17:13,215 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:17:13,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:17:13,216 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:17:13,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-16 20:17:13,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:17:13,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:17:13,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 20:17:13,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:13,576 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:13,576 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:14,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:15,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [271607045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:15,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59797212] [2022-11-16 20:17:15,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:17:15,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:17:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:17:15,332 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:17:15,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 20:17:15,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:17:15,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:17:15,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:17:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:15,559 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:15,559 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:15,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:16,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59797212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:16,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:17:16,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-11-16 20:17:16,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947655682] [2022-11-16 20:17:16,443 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:17:16,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 20:17:16,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:17:16,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 20:17:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:17:16,444 INFO L87 Difference]: Start difference. First operand 248 states and 706 transitions. Second operand has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:17:29,946 INFO L93 Difference]: Finished difference Result 825 states and 2407 transitions. [2022-11-16 20:17:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 20:17:29,947 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 20:17:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:17:29,954 INFO L225 Difference]: With dead ends: 825 [2022-11-16 20:17:29,954 INFO L226 Difference]: Without dead ends: 825 [2022-11-16 20:17:29,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=481, Invalid=2489, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 20:17:29,956 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 414 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:17:29,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 185 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 998 Invalid, 0 Unknown, 293 Unchecked, 5.9s Time] [2022-11-16 20:17:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-11-16 20:17:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 354. [2022-11-16 20:17:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 349 states have (on average 3.163323782234957) internal successors, (1104), 353 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1104 transitions. [2022-11-16 20:17:29,985 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1104 transitions. Word has length 11 [2022-11-16 20:17:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:17:29,985 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 1104 transitions. [2022-11-16 20:17:29,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:17:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1104 transitions. [2022-11-16 20:17:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:17:29,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:17:29,987 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 20:17:29,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:30,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-16 20:17:30,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-16 20:17:30,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:17:30,591 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:17:30,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:17:30,591 INFO L85 PathProgramCache]: Analyzing trace with hash 643104706, now seen corresponding path program 1 times [2022-11-16 20:17:30,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:17:30,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14472051] [2022-11-16 20:17:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:30,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:17:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:17:30,593 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:17:30,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 20:17:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:17:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:30,799 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:30,799 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:31,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:17:32,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:17:32,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14472051] [2022-11-16 20:17:32,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14472051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:32,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861188754] [2022-11-16 20:17:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:32,799 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:17:32,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:17:32,803 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:17:32,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-16 20:17:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:17:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:33,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:34,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861188754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:34,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242674114] [2022-11-16 20:17:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:17:34,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:17:34,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:17:34,640 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:17:34,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 20:17:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:17:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:17:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:17:34,862 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:17:34,862 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:17:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:35,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:17:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:17:37,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242674114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:17:37,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:17:37,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 45 [2022-11-16 20:17:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382597836] [2022-11-16 20:17:37,268 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:17:37,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 20:17:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:17:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 20:17:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 20:17:37,270 INFO L87 Difference]: Start difference. First operand 354 states and 1104 transitions. Second operand has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:18:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:18:24,900 INFO L93 Difference]: Finished difference Result 1911 states and 5498 transitions. [2022-11-16 20:18:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-16 20:18:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 20:18:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:18:24,912 INFO L225 Difference]: With dead ends: 1911 [2022-11-16 20:18:24,912 INFO L226 Difference]: Without dead ends: 1911 [2022-11-16 20:18:24,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4208 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=1598, Invalid=12208, Unknown=0, NotChecked=0, Total=13806 [2022-11-16 20:18:24,921 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1367 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 3688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:18:24,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 485 Invalid, 3688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3031 Invalid, 0 Unknown, 589 Unchecked, 15.8s Time] [2022-11-16 20:18:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-11-16 20:18:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 673. [2022-11-16 20:18:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 668 states have (on average 3.717065868263473) internal successors, (2483), 672 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:18:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2483 transitions. [2022-11-16 20:18:24,957 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2483 transitions. Word has length 12 [2022-11-16 20:18:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:18:24,958 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 2483 transitions. [2022-11-16 20:18:24,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:18:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2483 transitions. [2022-11-16 20:18:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:18:24,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:18:24,960 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 20:18:24,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-16 20:18:25,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 20:18:25,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 20:18:25,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:18:25,564 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:18:25,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:18:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash -231230620, now seen corresponding path program 2 times [2022-11-16 20:18:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:18:25,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564380677] [2022-11-16 20:18:25,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:18:25,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:18:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:18:25,566 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:18:25,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 20:18:25,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:18:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:18:25,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:18:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:18:25,806 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:18:25,806 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:18:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:18:26,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:18:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:18:27,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:18:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564380677] [2022-11-16 20:18:27,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564380677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:18:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [465357550] [2022-11-16 20:18:27,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:18:27,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:18:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:18:27,756 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:18:27,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-16 20:18:28,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:18:28,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:18:28,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 20:18:28,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:18:28,146 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:18:28,146 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:18:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:18:28,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:18:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:18:29,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [465357550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:18:29,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937614539] [2022-11-16 20:18:29,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:18:29,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:18:29,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:18:29,974 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:18:29,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 20:18:30,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:18:30,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:18:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:18:30,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:18:30,236 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:18:30,236 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:18:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:18:30,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:18:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:18:31,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937614539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:18:31,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:18:31,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-11-16 20:18:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801257634] [2022-11-16 20:18:31,218 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:18:31,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 20:18:31,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:18:31,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 20:18:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:18:31,219 INFO L87 Difference]: Start difference. First operand 673 states and 2483 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:18:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:18:50,121 INFO L93 Difference]: Finished difference Result 1498 states and 4836 transitions. [2022-11-16 20:18:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 20:18:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 20:18:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:18:50,132 INFO L225 Difference]: With dead ends: 1498 [2022-11-16 20:18:50,132 INFO L226 Difference]: Without dead ends: 1498 [2022-11-16 20:18:50,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 20:18:50,133 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 612 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:18:50,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 191 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1281 Invalid, 0 Unknown, 363 Unchecked, 8.8s Time] [2022-11-16 20:18:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-11-16 20:18:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 676. [2022-11-16 20:18:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 671 states have (on average 3.7198211624441133) internal successors, (2496), 675 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:18:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2496 transitions. [2022-11-16 20:18:50,164 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2496 transitions. Word has length 12 [2022-11-16 20:18:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:18:50,164 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 2496 transitions. [2022-11-16 20:18:50,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:18:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2496 transitions. [2022-11-16 20:18:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:18:50,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:18:50,166 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 20:18:50,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 20:18:50,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-16 20:18:50,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-16 20:18:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:18:50,775 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:18:50,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:18:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash -854556788, now seen corresponding path program 3 times [2022-11-16 20:18:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:18:50,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944876681] [2022-11-16 20:18:50,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:18:50,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:18:50,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:18:50,777 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:18:50,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 20:18:51,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 20:18:51,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:18:51,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:18:51,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:18:51,088 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:18:51,088 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:18:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:18:51,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:18:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:18:54,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:18:54,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944876681] [2022-11-16 20:18:54,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944876681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:18:54,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1863139354] [2022-11-16 20:18:54,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:18:54,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:18:54,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:18:54,819 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:18:54,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-16 20:18:55,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 20:18:55,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:18:55,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 20:18:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:18:55,676 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:18:55,677 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:18:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:18:55,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:18:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:18:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1863139354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:18:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844485991] [2022-11-16 20:18:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:18:57,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:18:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:18:57,206 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:18:57,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 20:18:59,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 20:18:59,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:18:59,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:18:59,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:18:59,970 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:18:59,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:19:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:19:00,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:19:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:19:03,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844485991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:19:03,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:19:03,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 34 [2022-11-16 20:19:03,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487054187] [2022-11-16 20:19:03,835 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:19:03,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 20:19:03,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:19:03,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 20:19:03,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 20:19:03,837 INFO L87 Difference]: Start difference. First operand 676 states and 2496 transitions. Second operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:19:25,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:19:25,157 INFO L93 Difference]: Finished difference Result 4186 states and 13350 transitions. [2022-11-16 20:19:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 20:19:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 20:19:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:19:25,178 INFO L225 Difference]: With dead ends: 4186 [2022-11-16 20:19:25,178 INFO L226 Difference]: Without dead ends: 4186 [2022-11-16 20:19:25,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 20:19:25,179 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3523 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3523 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:19:25,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3523 Valid, 290 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-16 20:19:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2022-11-16 20:19:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 688. [2022-11-16 20:19:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 683 states have (on average 3.6896046852122986) internal successors, (2520), 687 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:19:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2520 transitions. [2022-11-16 20:19:25,237 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2520 transitions. Word has length 12 [2022-11-16 20:19:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:19:25,238 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 2520 transitions. [2022-11-16 20:19:25,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:19:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2520 transitions. [2022-11-16 20:19:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:19:25,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:19:25,240 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:19:25,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-16 20:19:25,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-16 20:19:25,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-16 20:19:25,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:19:25,853 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:19:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:19:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1642946095, now seen corresponding path program 1 times [2022-11-16 20:19:25,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:19:25,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499025608] [2022-11-16 20:19:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:19:25,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:19:25,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:19:25,855 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:19:25,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 20:19:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:19:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:19:26,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:19:26,105 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:19:26,106 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:19:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:19:26,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:19:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:19:28,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:19:28,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499025608] [2022-11-16 20:19:28,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499025608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:19:28,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1169302336] [2022-11-16 20:19:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:19:28,155 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:19:28,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:19:28,158 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:19:28,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-16 20:19:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:19:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:19:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:19:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:19:29,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:19:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:19:30,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1169302336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:19:30,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028459334] [2022-11-16 20:19:30,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:19:30,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:19:30,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:19:30,293 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:19:30,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 20:19:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:19:30,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:19:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:19:30,566 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:19:30,566 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:19:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:19:31,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:19:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:19:33,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028459334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:19:33,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:19:33,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 45 [2022-11-16 20:19:33,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064607686] [2022-11-16 20:19:33,299 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:19:33,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 20:19:33,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:19:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 20:19:33,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 20:19:33,300 INFO L87 Difference]: Start difference. First operand 688 states and 2520 transitions. Second operand has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:15,378 INFO L93 Difference]: Finished difference Result 1604 states and 4989 transitions. [2022-11-16 20:20:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 20:20:15,379 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:20:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:15,385 INFO L225 Difference]: With dead ends: 1604 [2022-11-16 20:20:15,385 INFO L226 Difference]: Without dead ends: 1604 [2022-11-16 20:20:15,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=924, Invalid=6558, Unknown=0, NotChecked=0, Total=7482 [2022-11-16 20:20:15,387 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1141 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 2736 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:15,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1141 Valid, 440 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2736 Invalid, 0 Unknown, 416 Unchecked, 17.7s Time] [2022-11-16 20:20:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2022-11-16 20:20:15,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 640. [2022-11-16 20:20:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 635 states have (on average 3.664566929133858) internal successors, (2327), 639 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2327 transitions. [2022-11-16 20:20:15,415 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2327 transitions. Word has length 13 [2022-11-16 20:20:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:15,416 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 2327 transitions. [2022-11-16 20:20:15,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2327 transitions. [2022-11-16 20:20:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:20:15,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:15,418 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:15,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:15,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:15,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:16,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:20:16,028 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:20:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:16,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1813306319, now seen corresponding path program 2 times [2022-11-16 20:20:16,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:20:16,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902450561] [2022-11-16 20:20:16,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:20:16,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:20:16,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:20:16,030 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:20:16,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 20:20:16,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:20:16,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:20:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:16,293 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:20:16,293 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:20:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:20:16,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:20:18,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:20:18,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902450561] [2022-11-16 20:20:18,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902450561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:18,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1342977236] [2022-11-16 20:20:18,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:20:18,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:20:18,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:20:18,495 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:20:18,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-16 20:20:18,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:20:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:18,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 20:20:18,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:18,958 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:20:18,958 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:20:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:19,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:20,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1342977236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:20,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277718096] [2022-11-16 20:20:20,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:20:20,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:20,912 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:20,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 20:20:21,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:20:21,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:20:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:21,213 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:20:21,213 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:20:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:21,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:22,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277718096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:22,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:20:22,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-11-16 20:20:22,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552212254] [2022-11-16 20:20:22,254 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:20:22,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 20:20:22,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:20:22,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 20:20:22,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:20:22,256 INFO L87 Difference]: Start difference. First operand 640 states and 2327 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:47,680 INFO L93 Difference]: Finished difference Result 1466 states and 4679 transitions. [2022-11-16 20:20:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 20:20:47,680 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:20:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:47,689 INFO L225 Difference]: With dead ends: 1466 [2022-11-16 20:20:47,689 INFO L226 Difference]: Without dead ends: 1466 [2022-11-16 20:20:47,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=710, Invalid=3580, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 20:20:47,691 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 698 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:47,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 235 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1288 Invalid, 0 Unknown, 359 Unchecked, 11.4s Time] [2022-11-16 20:20:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-11-16 20:20:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 715. [2022-11-16 20:20:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 710 states have (on average 3.6619718309859155) internal successors, (2600), 714 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2600 transitions. [2022-11-16 20:20:47,719 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2600 transitions. Word has length 13 [2022-11-16 20:20:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:47,719 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 2600 transitions. [2022-11-16 20:20:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2600 transitions. [2022-11-16 20:20:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:20:47,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:47,721 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:47,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:47,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-16 20:20:48,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-16 20:20:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:48,335 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:20:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1418421361, now seen corresponding path program 3 times [2022-11-16 20:20:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:20:48,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871912886] [2022-11-16 20:20:48,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:20:48,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:20:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:20:48,337 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:20:48,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 20:20:48,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:20:48,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 20:20:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:48,665 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:20:48,665 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:20:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:49,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:20:49,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871912886] [2022-11-16 20:20:49,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871912886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:49,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [533981431] [2022-11-16 20:20:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:20:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:20:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:20:49,624 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:20:49,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-16 20:20:50,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:20:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:50,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 20:20:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:50,271 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:20:50,271 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:20:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:50,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:50,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [533981431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:50,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555850634] [2022-11-16 20:20:50,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:20:50,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:50,566 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:50,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-16 20:20:50,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:20:50,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:50,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:20:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:50,925 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:20:50,926 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:20:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:51,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:51,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555850634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:51,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:20:51,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 18 [2022-11-16 20:20:51,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209284755] [2022-11-16 20:20:51,603 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:20:51,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 20:20:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:20:51,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 20:20:51,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:20:51,605 INFO L87 Difference]: Start difference. First operand 715 states and 2600 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:55,487 INFO L93 Difference]: Finished difference Result 789 states and 2567 transitions. [2022-11-16 20:20:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 20:20:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:20:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:55,493 INFO L225 Difference]: With dead ends: 789 [2022-11-16 20:20:55,493 INFO L226 Difference]: Without dead ends: 789 [2022-11-16 20:20:55,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:20:55,494 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 235 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:55,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 79 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 382 Invalid, 0 Unknown, 280 Unchecked, 2.7s Time] [2022-11-16 20:20:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-16 20:20:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 581. [2022-11-16 20:20:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 576 states have (on average 3.5434027777777777) internal successors, (2041), 580 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 2041 transitions. [2022-11-16 20:20:55,531 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 2041 transitions. Word has length 13 [2022-11-16 20:20:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:55,531 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 2041 transitions. [2022-11-16 20:20:55,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:20:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 2041 transitions. [2022-11-16 20:20:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:20:55,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:55,533 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:55,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:55,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-16 20:20:55,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:56,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:56,134 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:20:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1816279549, now seen corresponding path program 4 times [2022-11-16 20:20:56,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:20:56,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972292513] [2022-11-16 20:20:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:20:56,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:20:56,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:20:56,136 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:20:56,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 20:20:56,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:20:56,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:20:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:56,397 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:20:56,397 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:20:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:20:56,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:20:58,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:20:58,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972292513] [2022-11-16 20:20:58,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972292513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:58,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436910243] [2022-11-16 20:20:58,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:20:58,603 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:20:58,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:20:58,604 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:20:58,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-16 20:20:58,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:20:58,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:58,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:20:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:20:59,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:21:00,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436910243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:00,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402370276] [2022-11-16 20:21:00,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:21:00,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:00,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:00,703 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:00,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-16 20:21:00,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:21:00,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:21:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:00,959 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:21:00,959 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:21:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:21:01,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:21:03,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402370276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:03,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:21:03,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 45 [2022-11-16 20:21:03,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926336876] [2022-11-16 20:21:03,514 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:03,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 20:21:03,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:21:03,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 20:21:03,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 20:21:03,515 INFO L87 Difference]: Start difference. First operand 581 states and 2041 transitions. Second operand has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:21:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:38,405 INFO L93 Difference]: Finished difference Result 1358 states and 4196 transitions. [2022-11-16 20:21:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 20:21:38,406 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:21:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:38,410 INFO L225 Difference]: With dead ends: 1358 [2022-11-16 20:21:38,411 INFO L226 Difference]: Without dead ends: 1358 [2022-11-16 20:21:38,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=1060, Invalid=6772, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 20:21:38,413 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1100 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 2658 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:38,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 461 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2658 Invalid, 0 Unknown, 474 Unchecked, 13.7s Time] [2022-11-16 20:21:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-11-16 20:21:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 510. [2022-11-16 20:21:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 3.4237623762376237) internal successors, (1729), 509 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:21:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1729 transitions. [2022-11-16 20:21:38,434 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1729 transitions. Word has length 13 [2022-11-16 20:21:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:38,434 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 1729 transitions. [2022-11-16 20:21:38,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:21:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1729 transitions. [2022-11-16 20:21:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:21:38,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:38,436 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:38,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 20:21:38,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:38,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:39,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:39,049 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:21:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:39,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1476546962, now seen corresponding path program 2 times [2022-11-16 20:21:39,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:21:39,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856990153] [2022-11-16 20:21:39,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:21:39,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:21:39,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:21:39,051 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:21:39,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 20:21:39,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:21:39,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:39,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:21:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:39,305 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:21:39,306 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:21:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:21:39,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:21:41,360 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:21:41,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856990153] [2022-11-16 20:21:41,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856990153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:41,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568255541] [2022-11-16 20:21:41,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:21:41,360 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:21:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:21:41,361 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:21:41,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-16 20:21:41,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:21:41,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:21:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:41,813 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:21:41,813 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:21:42,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:21:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:21:42,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:21:43,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568255541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:43,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284009596] [2022-11-16 20:21:43,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:21:43,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:43,569 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:43,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-16 20:21:43,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:21:43,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:43,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 20:21:43,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:21:44,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:21:44,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284009596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:44,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:21:44,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 36 [2022-11-16 20:21:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091628042] [2022-11-16 20:21:44,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:44,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 20:21:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:21:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 20:21:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 20:21:44,634 INFO L87 Difference]: Start difference. First operand 510 states and 1729 transitions. Second operand has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:22:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:11,901 INFO L93 Difference]: Finished difference Result 999 states and 3008 transitions. [2022-11-16 20:22:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 20:22:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:22:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:11,905 INFO L225 Difference]: With dead ends: 999 [2022-11-16 20:22:11,905 INFO L226 Difference]: Without dead ends: 999 [2022-11-16 20:22:11,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=668, Invalid=3888, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 20:22:11,907 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 592 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:11,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 368 Invalid, 2768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2165 Invalid, 0 Unknown, 575 Unchecked, 11.3s Time] [2022-11-16 20:22:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-11-16 20:22:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 581. [2022-11-16 20:22:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 576 states have (on average 3.451388888888889) internal successors, (1988), 580 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:22:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1988 transitions. [2022-11-16 20:22:11,924 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1988 transitions. Word has length 13 [2022-11-16 20:22:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:11,925 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 1988 transitions. [2022-11-16 20:22:11,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:22:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1988 transitions. [2022-11-16 20:22:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:22:11,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:11,926 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-16 20:22:11,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:12,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-16 20:22:12,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-16 20:22:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:22:12,535 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:22:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1033869390, now seen corresponding path program 3 times [2022-11-16 20:22:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:22:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938612038] [2022-11-16 20:22:12,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:22:12,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:22:12,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:22:12,537 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:22:12,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 20:22:12,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:22:12,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:22:12,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 20:22:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:12,956 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:22:12,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:22:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:13,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:22:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:16,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:22:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938612038] [2022-11-16 20:22:16,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938612038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:22:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [950507250] [2022-11-16 20:22:16,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:22:16,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:22:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:22:16,111 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:22:16,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-16 20:22:17,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:22:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:22:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:22:17,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:17,251 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:22:17,252 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:22:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:22:18,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:22:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:21,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [950507250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:22:21,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496420310] [2022-11-16 20:22:21,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:22:21,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:21,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:21,516 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:21,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-16 20:22:21,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:22:21,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:22:21,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 20:22:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:21,935 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:22:21,935 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:22:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:22:23,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:22:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:22:25,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496420310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:22:25,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:22:25,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 11, 10, 10] total 56 [2022-11-16 20:22:25,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654372683] [2022-11-16 20:22:25,831 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:22:25,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 20:22:25,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:22:25,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 20:22:25,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2752, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 20:22:25,835 INFO L87 Difference]: Start difference. First operand 581 states and 1988 transitions. Second operand has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:03,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:12,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:24:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:38,007 INFO L93 Difference]: Finished difference Result 3227 states and 9346 transitions. [2022-11-16 20:24:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-16 20:24:38,009 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:24:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:38,016 INFO L225 Difference]: With dead ends: 3227 [2022-11-16 20:24:38,016 INFO L226 Difference]: Without dead ends: 3227 [2022-11-16 20:24:38,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5399 ImplicationChecksByTransitivity, 102.5s TimeCoverageRelationStatistics Valid=2409, Invalid=14103, Unknown=0, NotChecked=0, Total=16512 [2022-11-16 20:24:38,018 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2223 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 3611 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2223 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 4977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 39.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:38,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2223 Valid, 533 Invalid, 4977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3611 Invalid, 0 Unknown, 1294 Unchecked, 39.3s Time] [2022-11-16 20:24:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-11-16 20:24:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 899. [2022-11-16 20:24:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 894 states have (on average 3.635346756152125) internal successors, (3250), 898 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:24:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3250 transitions. [2022-11-16 20:24:38,062 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3250 transitions. Word has length 13 [2022-11-16 20:24:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:38,062 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 3250 transitions. [2022-11-16 20:24:38,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:24:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3250 transitions. [2022-11-16 20:24:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:24:38,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:38,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-16 20:24:38,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-16 20:24:38,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-16 20:24:38,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-16 20:24:38,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:24:38,671 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:24:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1274831531, now seen corresponding path program 4 times [2022-11-16 20:24:38,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:24:38,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765530391] [2022-11-16 20:24:38,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:24:38,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:24:38,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:24:38,673 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:24:38,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 20:24:38,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:24:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:24:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:24:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:38,936 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:24:38,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:24:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 20:24:39,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:24:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 20:24:40,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:24:40,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765530391] [2022-11-16 20:24:40,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765530391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:24:40,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [186581187] [2022-11-16 20:24:40,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:24:40,483 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:24:40,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:24:40,488 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:24:40,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-16 20:24:40,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:24:40,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:24:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:24:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:41,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:24:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:42,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [186581187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:24:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653959895] [2022-11-16 20:24:42,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:24:42,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:42,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:42,997 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:43,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-16 20:24:43,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:24:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:24:43,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 20:24:43,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:43,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:24:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:43,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653959895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:24:43,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:24:43,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 41 [2022-11-16 20:24:43,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117310425] [2022-11-16 20:24:43,849 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:24:43,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 20:24:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:24:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 20:24:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 20:24:43,850 INFO L87 Difference]: Start difference. First operand 899 states and 3250 transitions. Second operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:12,557 INFO L93 Difference]: Finished difference Result 2138 states and 6153 transitions. [2022-11-16 20:25:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 20:25:12,559 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:25:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:12,564 INFO L225 Difference]: With dead ends: 2138 [2022-11-16 20:25:12,564 INFO L226 Difference]: Without dead ends: 2120 [2022-11-16 20:25:12,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=1872, Invalid=8634, Unknown=0, NotChecked=0, Total=10506 [2022-11-16 20:25:12,565 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3322 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 4289 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3322 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 4431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 4289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:25:12,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3322 Valid, 571 Invalid, 4431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 4289 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-16 20:25:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2022-11-16 20:25:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 685. [2022-11-16 20:25:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 680 states have (on average 3.1838235294117645) internal successors, (2165), 684 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2165 transitions. [2022-11-16 20:25:12,603 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2165 transitions. Word has length 13 [2022-11-16 20:25:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:12,604 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 2165 transitions. [2022-11-16 20:25:12,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2165 transitions. [2022-11-16 20:25:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 20:25:12,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:12,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:12,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-16 20:25:12,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-16 20:25:13,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-16 20:25:13,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:25:13,220 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:25:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash 495077397, now seen corresponding path program 1 times [2022-11-16 20:25:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:25:13,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144318464] [2022-11-16 20:25:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:13,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:25:13,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:25:13,222 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:25:13,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 20:25:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:13,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:25:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:25:13,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:25:13,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:25:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144318464] [2022-11-16 20:25:13,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144318464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:25:13,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:25:13,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:25:13,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768967115] [2022-11-16 20:25:13,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:25:13,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:25:13,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:25:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:25:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:25:13,386 INFO L87 Difference]: Start difference. First operand 685 states and 2165 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:13,506 INFO L93 Difference]: Finished difference Result 696 states and 2179 transitions. [2022-11-16 20:25:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:25:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 20:25:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:13,510 INFO L225 Difference]: With dead ends: 696 [2022-11-16 20:25:13,510 INFO L226 Difference]: Without dead ends: 677 [2022-11-16 20:25:13,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:25:13,511 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:25:13,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:25:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-11-16 20:25:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-11-16 20:25:13,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 672 states have (on average 3.174107142857143) internal successors, (2133), 676 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2133 transitions. [2022-11-16 20:25:13,528 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2133 transitions. Word has length 14 [2022-11-16 20:25:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:13,528 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 2133 transitions. [2022-11-16 20:25:13,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2133 transitions. [2022-11-16 20:25:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 20:25:13,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:13,530 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:13,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-16 20:25:13,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:25:13,742 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:25:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1860007500, now seen corresponding path program 1 times [2022-11-16 20:25:13,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:25:13,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936112183] [2022-11-16 20:25:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:13,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:25:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:25:13,744 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:25:13,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 20:25:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:13,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:25:13,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:14,004 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:25:14,004 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:25:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:25:14,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:25:16,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:25:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936112183] [2022-11-16 20:25:16,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936112183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1729706293] [2022-11-16 20:25:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:16,121 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:25:16,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:25:16,122 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:25:16,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-16 20:25:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:16,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:25:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:25:17,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:25:18,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1729706293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543502098] [2022-11-16 20:25:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:18,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:18,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:18,210 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:25:18,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-16 20:25:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 20:25:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:25:18,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:25:18,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543502098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:18,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:25:18,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-11-16 20:25:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975411933] [2022-11-16 20:25:18,869 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:25:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 20:25:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:25:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 20:25:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 20:25:18,870 INFO L87 Difference]: Start difference. First operand 677 states and 2133 transitions. Second operand has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:46,062 INFO L93 Difference]: Finished difference Result 1190 states and 3348 transitions. [2022-11-16 20:25:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 20:25:46,062 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 20:25:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:46,066 INFO L225 Difference]: With dead ends: 1190 [2022-11-16 20:25:46,066 INFO L226 Difference]: Without dead ends: 1190 [2022-11-16 20:25:46,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=669, Invalid=4161, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 20:25:46,067 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 588 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:25:46,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 341 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2173 Invalid, 0 Unknown, 384 Unchecked, 10.7s Time] [2022-11-16 20:25:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-16 20:25:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 729. [2022-11-16 20:25:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 724 states have (on average 3.1767955801104972) internal successors, (2300), 728 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2300 transitions. [2022-11-16 20:25:46,089 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2300 transitions. Word has length 14 [2022-11-16 20:25:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:46,090 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 2300 transitions. [2022-11-16 20:25:46,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:25:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2300 transitions. [2022-11-16 20:25:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 20:25:46,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:46,092 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:46,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-16 20:25:46,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-16 20:25:46,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 20:25:46,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:25:46,696 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:25:46,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:46,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1013620536, now seen corresponding path program 2 times [2022-11-16 20:25:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:25:46,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478878194] [2022-11-16 20:25:46,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:25:46,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:25:46,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:25:46,698 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:25:46,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 20:25:46,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:25:46,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:25:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:25:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:46,982 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:25:46,982 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:25:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:25:47,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:25:49,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:25:49,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478878194] [2022-11-16 20:25:49,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478878194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:49,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [834688827] [2022-11-16 20:25:49,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:25:49,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:25:49,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:25:49,067 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:25:49,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-16 20:25:49,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:25:49,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:25:49,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:25:49,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:49,563 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:25:49,563 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:25:49,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:25:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:25:50,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:25:51,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [834688827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:51,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424169515] [2022-11-16 20:25:51,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:25:51,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:51,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:51,372 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:25:51,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-16 20:25:51,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:25:51,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:25:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 20:25:51,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:25:52,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:25:52,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424169515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:52,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:25:52,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 36 [2022-11-16 20:25:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086582420] [2022-11-16 20:25:52,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:25:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 20:25:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:25:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 20:25:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 20:25:52,487 INFO L87 Difference]: Start difference. First operand 729 states and 2300 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:26:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:26:06,771 INFO L93 Difference]: Finished difference Result 926 states and 2699 transitions. [2022-11-16 20:26:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 20:26:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 20:26:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:26:06,774 INFO L225 Difference]: With dead ends: 926 [2022-11-16 20:26:06,775 INFO L226 Difference]: Without dead ends: 926 [2022-11-16 20:26:06,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=701, Invalid=3991, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 20:26:06,776 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 447 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:26:06,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 303 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1621 Invalid, 0 Unknown, 255 Unchecked, 7.2s Time] [2022-11-16 20:26:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-16 20:26:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 735. [2022-11-16 20:26:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 730 states have (on average 3.171232876712329) internal successors, (2315), 734 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:26:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2315 transitions. [2022-11-16 20:26:06,795 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2315 transitions. Word has length 14 [2022-11-16 20:26:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:26:06,795 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 2315 transitions. [2022-11-16 20:26:06,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:26:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2315 transitions. [2022-11-16 20:26:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 20:26:06,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:26:06,797 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:26:06,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-16 20:26:07,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-16 20:26:07,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 20:26:07,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:26:07,410 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:26:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:26:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash 200349192, now seen corresponding path program 1 times [2022-11-16 20:26:07,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:26:07,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088553203] [2022-11-16 20:26:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:26:07,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:26:07,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:26:07,413 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:26:07,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 20:26:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:26:07,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:26:07,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:26:07,694 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:26:07,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:26:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:26:08,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:26:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:26:09,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:26:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088553203] [2022-11-16 20:26:09,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088553203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:26:09,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634271137] [2022-11-16 20:26:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:26:09,842 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:26:09,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:26:09,843 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:26:09,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-16 20:26:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:26:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:26:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:26:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:26:10,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:26:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:26:11,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634271137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:26:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880905746] [2022-11-16 20:26:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:26:11,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:26:11,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:26:11,935 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:26:11,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-16 20:26:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:26:12,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 20:26:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:26:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:26:12,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:26:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:26:12,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880905746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:26:12,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:26:12,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-11-16 20:26:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153781776] [2022-11-16 20:26:12,642 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:26:12,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 20:26:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:26:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 20:26:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 20:26:12,643 INFO L87 Difference]: Start difference. First operand 735 states and 2315 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:26:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:26:21,818 INFO L93 Difference]: Finished difference Result 920 states and 2818 transitions. [2022-11-16 20:26:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 20:26:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 20:26:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:26:21,819 INFO L225 Difference]: With dead ends: 920 [2022-11-16 20:26:21,820 INFO L226 Difference]: Without dead ends: 920 [2022-11-16 20:26:21,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=620, Invalid=3540, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 20:26:21,823 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 425 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:26:21,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 259 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 994 Invalid, 0 Unknown, 261 Unchecked, 3.6s Time] [2022-11-16 20:26:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-16 20:26:21,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 768. [2022-11-16 20:26:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 763 states have (on average 3.166448230668414) internal successors, (2416), 767 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:26:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2416 transitions. [2022-11-16 20:26:21,842 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2416 transitions. Word has length 15 [2022-11-16 20:26:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:26:21,844 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 2416 transitions. [2022-11-16 20:26:21,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:26:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2416 transitions. [2022-11-16 20:26:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 20:26:21,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:26:21,846 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:26:21,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-16 20:26:22,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-16 20:26:22,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-16 20:26:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:26:22,456 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:26:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:26:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash 534002397, now seen corresponding path program 3 times [2022-11-16 20:26:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:26:22,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139382926] [2022-11-16 20:26:22,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:26:22,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:26:22,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:26:22,458 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:26:22,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 20:26:22,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:26:22,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:26:22,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 20:26:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:26:22,907 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:26:22,908 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:26:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:26:23,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:26:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:26:25,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:26:25,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139382926] [2022-11-16 20:26:25,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139382926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:26:25,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1153729204] [2022-11-16 20:26:25,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:26:25,657 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:26:25,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:26:25,660 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:26:25,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-16 20:26:26,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:26:26,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:26:26,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:26:26,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:26:26,758 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:26:26,758 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:26:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:26:26,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:26:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:26:30,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1153729204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:26:30,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687369244] [2022-11-16 20:26:30,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:26:30,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:26:30,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:26:30,449 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:26:30,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-16 20:26:30,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:26:30,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:26:30,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:26:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:26:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:26:32,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:26:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:26:33,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687369244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:26:33,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:26:33,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 11, 10, 10] total 50 [2022-11-16 20:26:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965457991] [2022-11-16 20:26:33,942 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:26:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 20:26:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:26:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 20:26:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 20:26:33,944 INFO L87 Difference]: Start difference. First operand 768 states and 2416 transitions. Second operand has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:27:13,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:27:26,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:28:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:28:04,170 INFO L93 Difference]: Finished difference Result 1327 states and 3659 transitions. [2022-11-16 20:28:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 20:28:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 20:28:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:28:04,174 INFO L225 Difference]: With dead ends: 1327 [2022-11-16 20:28:04,174 INFO L226 Difference]: Without dead ends: 1327 [2022-11-16 20:28:04,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 67.9s TimeCoverageRelationStatistics Valid=1359, Invalid=8741, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 20:28:04,176 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1491 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 4149 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 4501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:28:04,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 589 Invalid, 4501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4149 Invalid, 0 Unknown, 285 Unchecked, 30.5s Time] [2022-11-16 20:28:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-11-16 20:28:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 854. [2022-11-16 20:28:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 849 states have (on average 3.1036513545347466) internal successors, (2635), 853 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2635 transitions. [2022-11-16 20:28:04,207 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2635 transitions. Word has length 15 [2022-11-16 20:28:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:28:04,207 INFO L495 AbstractCegarLoop]: Abstraction has 854 states and 2635 transitions. [2022-11-16 20:28:04,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2635 transitions. [2022-11-16 20:28:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 20:28:04,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:28:04,210 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:28:04,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-16 20:28:04,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-16 20:28:04,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-16 20:28:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:28:04,820 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:28:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:28:04,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1711940558, now seen corresponding path program 4 times [2022-11-16 20:28:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:28:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201811612] [2022-11-16 20:28:04,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:28:04,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:28:04,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:28:04,823 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:28:04,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 20:28:05,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:28:05,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:28:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 20:28:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:05,130 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 20:28:05,130 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 20:28:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 20:28:05,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 20:28:06,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:28:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201811612] [2022-11-16 20:28:06,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201811612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [897385124] [2022-11-16 20:28:06,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:28:06,805 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:28:06,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:28:06,807 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:28:06,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-16 20:28:07,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:28:07,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:28:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:28:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:08,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:09,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [897385124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:09,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259212522] [2022-11-16 20:28:09,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:28:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:28:09,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:28:09,575 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:28:09,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-16 20:28:09,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:28:09,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:28:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 20:28:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:10,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:10,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259212522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:10,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:28:10,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 41 [2022-11-16 20:28:10,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713798986] [2022-11-16 20:28:10,453 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:28:10,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 20:28:10,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:28:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 20:28:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 20:28:10,455 INFO L87 Difference]: Start difference. First operand 854 states and 2635 transitions. Second operand has 43 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:28:39,109 INFO L93 Difference]: Finished difference Result 1546 states and 4199 transitions. [2022-11-16 20:28:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 20:28:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 20:28:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:28:39,114 INFO L225 Difference]: With dead ends: 1546 [2022-11-16 20:28:39,114 INFO L226 Difference]: Without dead ends: 1546 [2022-11-16 20:28:39,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=1787, Invalid=8313, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 20:28:39,115 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2662 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 3985 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2662 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 4124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 3985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:28:39,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2662 Valid, 498 Invalid, 4124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 3985 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-16 20:28:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2022-11-16 20:28:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 932. [2022-11-16 20:28:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 927 states have (on average 3.2006472491909386) internal successors, (2967), 931 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2967 transitions. [2022-11-16 20:28:39,140 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2967 transitions. Word has length 15 [2022-11-16 20:28:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:28:39,140 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 2967 transitions. [2022-11-16 20:28:39,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2967 transitions. [2022-11-16 20:28:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:28:39,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:28:39,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:28:39,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-16 20:28:39,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-16 20:28:39,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-11-16 20:28:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:28:39,744 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:28:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:28:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1538061841, now seen corresponding path program 1 times [2022-11-16 20:28:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:28:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526598584] [2022-11-16 20:28:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:28:39,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:28:39,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:28:39,746 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:28:39,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 20:28:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:28:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 20:28:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:40,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:28:40,012 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:28:40,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526598584] [2022-11-16 20:28:40,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526598584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:28:40,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:28:40,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:28:40,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664992492] [2022-11-16 20:28:40,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:28:40,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:28:40,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:28:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:28:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:28:40,014 INFO L87 Difference]: Start difference. First operand 932 states and 2967 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:28:40,240 INFO L93 Difference]: Finished difference Result 932 states and 2963 transitions. [2022-11-16 20:28:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:28:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 20:28:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:28:40,243 INFO L225 Difference]: With dead ends: 932 [2022-11-16 20:28:40,243 INFO L226 Difference]: Without dead ends: 919 [2022-11-16 20:28:40,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:28:40,243 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:28:40,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 8 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:28:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-16 20:28:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2022-11-16 20:28:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 914 states have (on average 3.219912472647702) internal successors, (2943), 918 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2943 transitions. [2022-11-16 20:28:40,256 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2943 transitions. Word has length 16 [2022-11-16 20:28:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:28:40,256 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 2943 transitions. [2022-11-16 20:28:40,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2943 transitions. [2022-11-16 20:28:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:28:40,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:28:40,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:28:40,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-16 20:28:40,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:28:40,458 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:28:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:28:40,459 INFO L85 PathProgramCache]: Analyzing trace with hash -709787036, now seen corresponding path program 1 times [2022-11-16 20:28:40,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:28:40,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832713709] [2022-11-16 20:28:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:28:40,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:28:40,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:28:40,460 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:28:40,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-16 20:28:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:28:40,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:28:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:40,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:28:40,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 46 [2022-11-16 20:28:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:40,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:41,287 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:28:41,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 187 treesize of output 91 [2022-11-16 20:28:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:43,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:28:43,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832713709] [2022-11-16 20:28:43,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832713709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:43,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1095787179] [2022-11-16 20:28:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:28:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:28:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:28:43,667 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:28:43,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-16 20:28:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:28:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 20:28:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:44,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:28:44,375 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 6 case distinctions, treesize of input 50 treesize of output 18 [2022-11-16 20:28:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:44,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:44,615 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:28:44,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 58 [2022-11-16 20:28:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:45,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1095787179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:45,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132358252] [2022-11-16 20:28:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:28:45,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:28:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:28:45,023 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:28:45,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-16 20:28:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:28:45,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:28:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:45,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:28:45,466 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 6 case distinctions, treesize of input 50 treesize of output 18 [2022-11-16 20:28:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:45,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:45,665 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:28:45,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 58 [2022-11-16 20:28:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:46,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132358252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:46,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:28:46,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 4, 6, 4] total 13 [2022-11-16 20:28:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934813757] [2022-11-16 20:28:46,030 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:28:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:28:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:28:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:28:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:28:46,031 INFO L87 Difference]: Start difference. First operand 919 states and 2943 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:28:47,063 INFO L93 Difference]: Finished difference Result 1071 states and 3283 transitions. [2022-11-16 20:28:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:28:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:28:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:28:47,066 INFO L225 Difference]: With dead ends: 1071 [2022-11-16 20:28:47,066 INFO L226 Difference]: Without dead ends: 1044 [2022-11-16 20:28:47,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:28:47,067 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:28:47,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 22 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 39 Unchecked, 1.0s Time] [2022-11-16 20:28:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-11-16 20:28:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 983. [2022-11-16 20:28:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 978 states have (on average 3.17280163599182) internal successors, (3103), 982 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 3103 transitions. [2022-11-16 20:28:47,085 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 3103 transitions. Word has length 17 [2022-11-16 20:28:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:28:47,086 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 3103 transitions. [2022-11-16 20:28:47,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 3103 transitions. [2022-11-16 20:28:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:28:47,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:28:47,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:28:47,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-16 20:28:47,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-16 20:28:47,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2022-11-16 20:28:47,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:28:47,695 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:28:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:28:47,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1111553198, now seen corresponding path program 2 times [2022-11-16 20:28:47,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:28:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46111553] [2022-11-16 20:28:47,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:28:47,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:28:47,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:28:47,697 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:28:47,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-16 20:28:47,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:28:47,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:28:47,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:28:47,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:48,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:28:48,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 40 [2022-11-16 20:28:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:48,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:48,494 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:28:48,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2022-11-16 20:28:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:51,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:28:51,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46111553] [2022-11-16 20:28:51,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46111553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:51,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [871824719] [2022-11-16 20:28:51,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:28:51,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:28:51,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:28:51,019 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:28:51,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-16 20:28:51,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:28:51,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:28:51,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 20:28:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:51,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:51,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-16 20:28:51,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:28:51,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:28:52,164 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 50 treesize of output 18 [2022-11-16 20:28:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:52,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:52,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [871824719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:52,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543104569] [2022-11-16 20:28:52,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:28:52,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:28:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:28:52,637 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:28:52,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-16 20:28:52,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:28:52,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:28:52,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 20:28:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:53,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:28:53,333 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 6 case distinctions, treesize of input 50 treesize of output 18 [2022-11-16 20:28:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:53,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:53,577 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:28:53,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2022-11-16 20:28:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:54,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543104569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:54,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:28:54,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 8, 5, 6, 4] total 22 [2022-11-16 20:28:54,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817116420] [2022-11-16 20:28:54,108 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:28:54,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 20:28:54,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:28:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 20:28:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=432, Unknown=2, NotChecked=0, Total=552 [2022-11-16 20:28:54,109 INFO L87 Difference]: Start difference. First operand 983 states and 3103 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:28:54,880 INFO L93 Difference]: Finished difference Result 1071 states and 3302 transitions. [2022-11-16 20:28:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 20:28:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:28:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:28:54,883 INFO L225 Difference]: With dead ends: 1071 [2022-11-16 20:28:54,883 INFO L226 Difference]: Without dead ends: 1060 [2022-11-16 20:28:54,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=137, Invalid=563, Unknown=2, NotChecked=0, Total=702 [2022-11-16 20:28:54,883 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:28:54,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 20 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 78 Unchecked, 0.5s Time] [2022-11-16 20:28:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-11-16 20:28:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1001. [2022-11-16 20:28:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 996 states have (on average 3.1546184738955825) internal successors, (3142), 1000 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3142 transitions. [2022-11-16 20:28:54,907 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3142 transitions. Word has length 17 [2022-11-16 20:28:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:28:54,907 INFO L495 AbstractCegarLoop]: Abstraction has 1001 states and 3142 transitions. [2022-11-16 20:28:54,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3142 transitions. [2022-11-16 20:28:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:28:54,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:28:54,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:28:54,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-16 20:28:55,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-16 20:28:55,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-16 20:28:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:28:55,509 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:28:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:28:55,509 INFO L85 PathProgramCache]: Analyzing trace with hash 589545774, now seen corresponding path program 3 times [2022-11-16 20:28:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:28:55,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678022373] [2022-11-16 20:28:55,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:28:55,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:28:55,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:28:55,511 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:28:55,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 20:28:55,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:28:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:28:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 20:28:55,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:56,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:28:56,013 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 6 case distinctions, treesize of input 126 treesize of output 46 [2022-11-16 20:28:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:56,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:56,540 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:28:56,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2022-11-16 20:28:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:28:59,116 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:28:59,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678022373] [2022-11-16 20:28:59,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678022373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:59,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1585563827] [2022-11-16 20:28:59,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:28:59,116 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:28:59,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:28:59,119 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:28:59,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-16 20:28:59,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:28:59,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:28:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 20:28:59,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:59,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:28:59,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-16 20:28:59,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:28:59,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:29:00,269 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 50 treesize of output 18 [2022-11-16 20:29:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:00,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:00,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1585563827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:00,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753457292] [2022-11-16 20:29:00,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:29:00,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:29:00,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:29:00,904 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:29:00,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-16 20:29:01,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:29:01,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:29:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:01,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:01,349 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 6 case distinctions, treesize of input 126 treesize of output 46 [2022-11-16 20:29:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:01,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:01,702 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:29:01,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2022-11-16 20:29:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:03,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753457292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:03,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:29:03,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 8, 5, 6, 4] total 21 [2022-11-16 20:29:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077961] [2022-11-16 20:29:03,534 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:29:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 20:29:03,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:29:03,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 20:29:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=390, Unknown=2, NotChecked=0, Total=506 [2022-11-16 20:29:03,536 INFO L87 Difference]: Start difference. First operand 1001 states and 3142 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2022-11-16 20:29:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:29:03,819 INFO L93 Difference]: Finished difference Result 1059 states and 3289 transitions. [2022-11-16 20:29:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 20:29:03,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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 17 [2022-11-16 20:29:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:29:03,823 INFO L225 Difference]: With dead ends: 1059 [2022-11-16 20:29:03,823 INFO L226 Difference]: Without dead ends: 1050 [2022-11-16 20:29:03,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=114, Invalid=390, Unknown=2, NotChecked=0, Total=506 [2022-11-16 20:29:03,823 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:29:03,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 17 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-16 20:29:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-11-16 20:29:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1005. [2022-11-16 20:29:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1000 states have (on average 3.154) internal successors, (3154), 1004 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3154 transitions. [2022-11-16 20:29:03,844 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3154 transitions. Word has length 17 [2022-11-16 20:29:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:29:03,844 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 3154 transitions. [2022-11-16 20:29:03,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2022-11-16 20:29:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3154 transitions. [2022-11-16 20:29:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:29:03,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:29:03,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:29:03,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-16 20:29:04,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-16 20:29:04,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-16 20:29:04,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:29:04,454 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:29:04,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:29:04,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1958182894, now seen corresponding path program 4 times [2022-11-16 20:29:04,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:29:04,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420124899] [2022-11-16 20:29:04,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:29:04,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:29:04,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:29:04,456 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:29:04,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-16 20:29:04,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:29:04,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:29:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:04,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:04,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 46 [2022-11-16 20:29:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:04,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:05,268 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:29:05,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2022-11-16 20:29:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:07,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:29:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420124899] [2022-11-16 20:29:07,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420124899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982751141] [2022-11-16 20:29:07,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:29:07,798 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:29:07,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:29:07,800 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:29:07,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-16 20:29:08,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:29:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:08,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 20:29:08,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:08,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:08,519 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 6 case distinctions, treesize of input 50 treesize of output 18 [2022-11-16 20:29:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:08,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:08,818 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:29:08,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2022-11-16 20:29:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:09,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1982751141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181052002] [2022-11-16 20:29:09,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:29:09,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:29:09,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:29:09,378 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:29:09,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-16 20:29:09,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:29:09,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:09,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:29:09,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:09,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:09,810 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 6 case distinctions, treesize of input 126 treesize of output 46 [2022-11-16 20:29:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:09,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:10,195 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:29:10,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2022-11-16 20:29:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:11,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181052002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:11,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:29:11,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 4, 6, 4] total 13 [2022-11-16 20:29:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567968584] [2022-11-16 20:29:11,757 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:29:11,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:29:11,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:29:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:29:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:29:11,758 INFO L87 Difference]: Start difference. First operand 1005 states and 3154 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:29:12,670 INFO L93 Difference]: Finished difference Result 1116 states and 3417 transitions. [2022-11-16 20:29:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:29:12,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:29:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:29:12,674 INFO L225 Difference]: With dead ends: 1116 [2022-11-16 20:29:12,674 INFO L226 Difference]: Without dead ends: 1094 [2022-11-16 20:29:12,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:29:12,674 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:29:12,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 9 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 77 Unchecked, 0.8s Time] [2022-11-16 20:29:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-16 20:29:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1015. [2022-11-16 20:29:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1010 states have (on average 3.1475247524752477) internal successors, (3179), 1014 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3179 transitions. [2022-11-16 20:29:12,702 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3179 transitions. Word has length 17 [2022-11-16 20:29:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:29:12,703 INFO L495 AbstractCegarLoop]: Abstraction has 1015 states and 3179 transitions. [2022-11-16 20:29:12,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3179 transitions. [2022-11-16 20:29:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:29:12,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:29:12,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:29:12,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-16 20:29:12,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-16 20:29:13,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-16 20:29:13,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:29:13,318 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:29:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:29:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash -72602906, now seen corresponding path program 5 times [2022-11-16 20:29:13,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:29:13,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744968938] [2022-11-16 20:29:13,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 20:29:13,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:29:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:29:13,320 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:29:13,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-16 20:29:13,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:29:13,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:29:13,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:13,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:13,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 40 [2022-11-16 20:29:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:13,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:14,061 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:29:14,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2022-11-16 20:29:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:16,106 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:29:16,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744968938] [2022-11-16 20:29:16,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744968938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:16,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639395543] [2022-11-16 20:29:16,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 20:29:16,106 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:29:16,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:29:16,111 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:29:16,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-16 20:29:16,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:29:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:16,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 20:29:16,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:16,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:16,879 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 6 case distinctions, treesize of input 50 treesize of output 18 [2022-11-16 20:29:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:16,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:17,145 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:29:17,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2022-11-16 20:29:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:17,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639395543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:17,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768853116] [2022-11-16 20:29:17,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 20:29:17,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:29:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:29:17,709 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:29:17,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-16 20:29:17,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:29:17,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:29:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:18,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:18,241 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 6 case distinctions, treesize of input 104 treesize of output 40 [2022-11-16 20:29:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:18,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:18,550 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:29:18,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2022-11-16 20:29:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:19,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768853116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:19,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:29:19,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 4, 6, 4] total 13 [2022-11-16 20:29:19,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119492255] [2022-11-16 20:29:19,928 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:29:19,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:29:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:29:19,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:29:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:29:19,930 INFO L87 Difference]: Start difference. First operand 1015 states and 3179 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:29:20,963 INFO L93 Difference]: Finished difference Result 1106 states and 3391 transitions. [2022-11-16 20:29:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:29:20,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:29:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:29:20,966 INFO L225 Difference]: With dead ends: 1106 [2022-11-16 20:29:20,966 INFO L226 Difference]: Without dead ends: 1082 [2022-11-16 20:29:20,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:29:20,967 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:29:20,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 35 Unchecked, 0.9s Time] [2022-11-16 20:29:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-11-16 20:29:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1012. [2022-11-16 20:29:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1007 states have (on average 3.1638530287984112) internal successors, (3186), 1011 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3186 transitions. [2022-11-16 20:29:20,986 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3186 transitions. Word has length 17 [2022-11-16 20:29:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:29:20,987 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 3186 transitions. [2022-11-16 20:29:20,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3186 transitions. [2022-11-16 20:29:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:29:20,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:29:20,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:29:21,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-16 20:29:21,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-11-16 20:29:21,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-16 20:29:21,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:29:21,599 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:29:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:29:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1137847500, now seen corresponding path program 6 times [2022-11-16 20:29:21,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:29:21,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673173912] [2022-11-16 20:29:21,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 20:29:21,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:29:21,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:29:21,600 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:29:21,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-16 20:29:21,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 20:29:21,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:21,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 20:29:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:21,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 20:29:22,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 20:29:22,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:22,224 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 6 case distinctions, treesize of input 126 treesize of output 46 [2022-11-16 20:29:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:22,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:22,748 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_2645 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2645) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (bvadd (bvneg .cse0) c_~counter~0) (_ bv0 32)) (not (bvsle c_~counter~0 (bvadd (_ bv2147483647 32) .cse0)))))) (forall ((v_ArrVal_2645 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2645) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (bvadd (bvneg .cse5) c_~counter~0) (_ bv0 32)) (not (bvsge .cse5 (_ bv0 32)))))))) is different from false [2022-11-16 20:29:22,956 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:29:22,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 146 [2022-11-16 20:29:22,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:22,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 54 [2022-11-16 20:29:24,880 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:29:24,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 310 treesize of output 166 [2022-11-16 20:29:24,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:24,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 74 [2022-11-16 20:29:52,513 WARN L233 SmtUtils]: Spent 17.40s on a formula simplification. DAG size of input: 644 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:29:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:29:52,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:29:52,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673173912] [2022-11-16 20:29:52,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673173912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:52,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1821546909] [2022-11-16 20:29:52,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 20:29:52,852 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:29:52,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:29:52,853 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:29:52,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-16 20:29:53,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:29:53,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275151530] [2022-11-16 20:29:53,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 20:29:53,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:29:53,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:29:53,262 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:29:53,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (96)] Forceful destruction successful, exit code 1 [2022-11-16 20:29:53,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-16 20:29:53,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 20:29:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:53,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 20:29:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:53,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 20:29:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:53,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-16 20:29:53,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:29:54,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 20:29:54,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:54,192 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 6 case distinctions, treesize of input 126 treesize of output 46 [2022-11-16 20:29:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:54,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:54,557 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_2703 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2703) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (not (bvsge .cse0 (_ bv0 32))) (= (bvadd c_~counter~0 (bvneg .cse0)) (_ bv0 32))))) (forall ((v_ArrVal_2703 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2703) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 (bvneg .cse5)) (_ bv0 32)) (not (bvsle c_~counter~0 (bvadd (_ bv2147483647 32) .cse5)))))))) is different from false [2022-11-16 20:29:54,646 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse8 (select |c_#memory_int| c_~A~0.base)) (.cse9 (bvmul (_ bv4 32) |c_thread1Thread1of1ForFork1_~i~0#1|))) (concat (concat (concat (select .cse8 (bvadd .cse9 (_ bv3 32) c_~A~0.offset)) (select .cse8 (bvadd .cse9 (_ bv2 32) c_~A~0.offset))) (select .cse8 (bvadd .cse9 c_~A~0.offset (_ bv1 32)))) (select .cse8 (bvadd .cse9 c_~A~0.offset))))) (.cse3 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse5 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_2703 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2703) c_~A~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~A~0.offset))))) (or (not (bvsle (bvadd c_~counter~0 .cse0) (bvadd (_ bv2147483647 32) .cse1))) (= (bvadd c_~counter~0 .cse0 (bvneg .cse1)) (_ bv0 32))))) (forall ((v_ArrVal_2703 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2703) c_~A~0.base))) (concat (concat (concat (select .cse7 .cse3) (select .cse7 .cse4)) (select .cse7 .cse5)) (select .cse7 c_~A~0.offset))))) (or (not (bvsge .cse6 (_ bv0 32))) (= (bvadd c_~counter~0 .cse0 (bvneg .cse6)) (_ bv0 32))))))) is different from false [2022-11-16 20:29:54,717 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse4 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse5 (bvadd c_~A~0.offset (_ bv1 32)))) (let ((.cse1 (let ((.cse8 (select |c_#memory_int| c_~A~0.base))) (concat (concat (concat (select .cse8 .cse3) (select .cse8 .cse4)) (select .cse8 .cse5)) (select .cse8 c_~A~0.offset))))) (and (forall ((v_ArrVal_2703 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2703) c_~A~0.base))) (concat (concat (concat (select .cse2 .cse3) (select .cse2 .cse4)) (select .cse2 .cse5)) (select .cse2 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 (bvneg .cse0) .cse1) (_ bv0 32)) (not (bvsle (bvadd c_~counter~0 .cse1) (bvadd (_ bv2147483647 32) .cse0)))))) (forall ((v_ArrVal_2703 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse6 (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2703) c_~A~0.base))) (concat (concat (concat (select .cse7 .cse3) (select .cse7 .cse4)) (select .cse7 .cse5)) (select .cse7 c_~A~0.offset))))) (or (not (bvsge .cse6 (_ bv0 32))) (= (bvadd c_~counter~0 (bvneg .cse6) .cse1) (_ bv0 32)))))))) is different from false [2022-11-16 20:29:54,852 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32))) (.cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32))) (.cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32)))) (and (forall ((v_ArrVal_2702 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2703 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2702))) (let ((.cse0 (let ((.cse6 (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2703) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (or (not (bvsge .cse0 (_ bv0 32))) (= (bvadd (bvneg .cse0) c_~counter~0 (let ((.cse1 (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (_ bv0 32)))))) (forall ((v_ArrVal_2702 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2703 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2702))) (let ((.cse8 (let ((.cse11 (select (store .cse10 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2703) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse11 .cse2) (select .cse11 .cse3)) (select .cse11 .cse4)) (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (.cse7 (let ((.cse9 (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse9 .cse2) (select .cse9 .cse3)) (select .cse9 .cse4)) (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (or (not (bvsle (bvadd c_~counter~0 .cse7) (bvadd (_ bv2147483647 32) .cse8))) (= (bvadd (bvneg .cse8) c_~counter~0 .cse7) (_ bv0 32)))))))) is different from false [2022-11-16 20:29:54,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:54,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 588 treesize of output 207 [2022-11-16 20:29:54,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:54,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1276 treesize of output 968 [2022-11-16 20:29:54,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:54,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 968 treesize of output 800 [2022-11-16 20:29:54,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:54,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 800 treesize of output 604 [2022-11-16 20:29:55,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:55,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 776 treesize of output 251 [2022-11-16 20:29:55,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:55,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2012 treesize of output 1484 [2022-11-16 20:29:55,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:55,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1484 treesize of output 1260 [2022-11-16 20:29:55,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:55,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1260 treesize of output 924 [2022-11-16 20:30:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 20:30:08,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275151530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:08,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-16 20:30:08,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 8] total 20 [2022-11-16 20:30:08,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255696348] [2022-11-16 20:30:08,247 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-16 20:30:08,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 20:30:08,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 20:30:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=210, Unknown=6, NotChecked=170, Total=462 [2022-11-16 20:30:08,248 INFO L87 Difference]: Start difference. First operand 1012 states and 3186 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:12,245 INFO L93 Difference]: Finished difference Result 1183 states and 3564 transitions. [2022-11-16 20:30:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:30:12,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:30:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:12,249 INFO L225 Difference]: With dead ends: 1183 [2022-11-16 20:30:12,249 INFO L226 Difference]: Without dead ends: 1170 [2022-11-16 20:30:12,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=104, Invalid=290, Unknown=6, NotChecked=200, Total=600 [2022-11-16 20:30:12,250 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:12,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 32 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 332 Unchecked, 1.0s Time] [2022-11-16 20:30:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-16 20:30:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1033. [2022-11-16 20:30:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1028 states have (on average 3.146887159533074) internal successors, (3235), 1032 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3235 transitions. [2022-11-16 20:30:12,278 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3235 transitions. Word has length 17 [2022-11-16 20:30:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:12,278 INFO L495 AbstractCegarLoop]: Abstraction has 1033 states and 3235 transitions. [2022-11-16 20:30:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3235 transitions. [2022-11-16 20:30:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:30:12,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:12,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:12,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-16 20:30:12,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-11-16 20:30:12,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:12,693 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:30:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1780414546, now seen corresponding path program 7 times [2022-11-16 20:30:12,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:12,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169490183] [2022-11-16 20:30:12,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:30:12,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:30:12,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:12,695 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:30:12,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-16 20:30:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:12,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 20:30:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:12,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 20:30:13,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 20:30:13,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:13,397 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 6 case distinctions, treesize of input 126 treesize of output 46 [2022-11-16 20:30:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:30:13,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:14,007 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_2730 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2730) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (bvadd (bvneg .cse0) c_~counter~0) (_ bv0 32)) (not (bvsle c_~counter~0 (bvadd (_ bv2147483647 32) .cse0)))))) (forall ((v_ArrVal_2730 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2730) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (not (bvsge .cse5 (_ bv0 32))) (= (bvadd (bvneg .cse5) c_~counter~0) (_ bv0 32))))))) is different from false [2022-11-16 20:30:14,280 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:30:14,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 146 [2022-11-16 20:30:14,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:14,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 54 [2022-11-16 20:30:18,469 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:30:18,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 310 treesize of output 166 [2022-11-16 20:30:18,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:18,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 74 [2022-11-16 20:30:32,405 WARN L233 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 536 DAG size of output: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:30:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:30:32,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:32,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169490183] [2022-11-16 20:30:32,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169490183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1762816427] [2022-11-16 20:30:32,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:30:32,678 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:32,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:32,683 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:32,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-16 20:30:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 20:30:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:30:33,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 20:30:34,051 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 50 treesize of output 18 [2022-11-16 20:30:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:30:34,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:34,907 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:30:34,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 154 treesize of output 102 [2022-11-16 20:30:34,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:34,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 23 [2022-11-16 20:30:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:30:36,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1762816427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:36,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975309857] [2022-11-16 20:30:36,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:30:36,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:36,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:36,523 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:36,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-16 20:30:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:36,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 20:30:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:36,835 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 42 treesize of output 38 [2022-11-16 20:30:36,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 20:30:37,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:37,026 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 6 case distinctions, treesize of input 126 treesize of output 46 [2022-11-16 20:30:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:30:37,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:37,325 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_2782 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2782) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (_ bv0 32) (bvadd c_~counter~0 (bvneg .cse0))) (not (bvsle c_~counter~0 (bvadd (_ bv2147483647 32) .cse0)))))) (forall ((v_ArrVal_2782 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2782) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (_ bv0 32) (bvadd c_~counter~0 (bvneg .cse5))) (not (bvsge .cse5 (_ bv0 32)))))))) is different from false [2022-11-16 20:30:37,602 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:30:37,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 146 [2022-11-16 20:30:37,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:37,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 54 [2022-11-16 20:30:39,363 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:30:39,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 310 treesize of output 166 [2022-11-16 20:30:39,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:39,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 74 [2022-11-16 20:30:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:30:43,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975309857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:43,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:30:43,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 24 [2022-11-16 20:30:43,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053134023] [2022-11-16 20:30:43,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:30:43,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 20:30:43,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:43,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 20:30:43,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=443, Unknown=3, NotChecked=90, Total=650 [2022-11-16 20:30:43,472 INFO L87 Difference]: Start difference. First operand 1033 states and 3235 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-11-16 20:30:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:44,643 INFO L93 Difference]: Finished difference Result 1080 states and 3353 transitions. [2022-11-16 20:30:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:30:44,645 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 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 17 [2022-11-16 20:30:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:44,646 INFO L225 Difference]: With dead ends: 1080 [2022-11-16 20:30:44,647 INFO L226 Difference]: Without dead ends: 1065 [2022-11-16 20:30:44,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=133, Invalid=522, Unknown=3, NotChecked=98, Total=756 [2022-11-16 20:30:44,647 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:44,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2022-11-16 20:30:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-11-16 20:30:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1030. [2022-11-16 20:30:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1025 states have (on average 3.149268292682927) internal successors, (3228), 1029 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:30:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3228 transitions. [2022-11-16 20:30:44,664 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3228 transitions. Word has length 17 [2022-11-16 20:30:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:44,665 INFO L495 AbstractCegarLoop]: Abstraction has 1030 states and 3228 transitions. [2022-11-16 20:30:44,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-11-16 20:30:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3228 transitions. [2022-11-16 20:30:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:30:44,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:44,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:30:44,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:44,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (99)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:45,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-16 20:30:45,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:30:45,274 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:30:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:45,274 INFO L85 PathProgramCache]: Analyzing trace with hash 594836630, now seen corresponding path program 8 times [2022-11-16 20:30:45,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:45,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585675286] [2022-11-16 20:30:45,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:30:45,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:30:45,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:45,276 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:30:45,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-16 20:30:45,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:30:45,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:30:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 20:30:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:45,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 20:30:45,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 20:30:45,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:45,982 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 6 case distinctions, treesize of input 126 treesize of output 46 [2022-11-16 20:30:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:30:46,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:46,654 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_2811 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2811) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 (bvneg .cse0)) (_ bv0 32)) (not (bvsge .cse0 (_ bv0 32)))))) (forall ((v_ArrVal_2811 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2811) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (not (bvsle c_~counter~0 (bvadd (_ bv2147483647 32) .cse5))) (= (bvadd c_~counter~0 (bvneg .cse5)) (_ bv0 32))))))) is different from false [2022-11-16 20:30:46,932 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:30:46,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 146 [2022-11-16 20:30:46,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:46,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 54 [2022-11-16 20:30:49,261 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:30:49,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 310 treesize of output 166 [2022-11-16 20:30:49,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:30:49,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 74 [2022-11-16 20:31:01,488 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 573 DAG size of output: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:31:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:31:01,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:31:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585675286] [2022-11-16 20:31:01,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585675286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:01,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [296446066] [2022-11-16 20:31:01,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:31:01,730 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:31:01,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:31:01,731 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:31:01,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-16 20:31:02,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:31:02,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269252628] [2022-11-16 20:31:02,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:31:02,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:02,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:31:02,156 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:31:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (102)] Forceful destruction successful, exit code 1 [2022-11-16 20:31:02,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-16 20:31:02,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:31:02,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 20:31:02,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:02,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 20:31:02,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-16 20:31:02,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:31:02,625 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 6 case distinctions, treesize of input 50 treesize of output 18 [2022-11-16 20:31:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:31:02,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:03,382 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 20:31:03,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 154 treesize of output 102 [2022-11-16 20:31:03,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:31:03,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 23 [2022-11-16 20:31:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:31:05,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269252628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:05,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-16 20:31:05,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 17 [2022-11-16 20:31:05,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011148970] [2022-11-16 20:31:05,199 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-16 20:31:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 20:31:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:31:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 20:31:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=233, Unknown=9, NotChecked=32, Total=342 [2022-11-16 20:31:05,200 INFO L87 Difference]: Start difference. First operand 1030 states and 3228 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:31:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:06,927 INFO L93 Difference]: Finished difference Result 1225 states and 3666 transitions. [2022-11-16 20:31:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:31:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17 [2022-11-16 20:31:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:06,931 INFO L225 Difference]: With dead ends: 1225 [2022-11-16 20:31:06,931 INFO L226 Difference]: Without dead ends: 1207 [2022-11-16 20:31:06,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=97, Invalid=318, Unknown=9, NotChecked=38, Total=462 [2022-11-16 20:31:06,931 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:06,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 27 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 248 Invalid, 0 Unknown, 184 Unchecked, 1.4s Time] [2022-11-16 20:31:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-11-16 20:31:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1006. [2022-11-16 20:31:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1001 states have (on average 3.172827172827173) internal successors, (3176), 1005 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:31:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3176 transitions. [2022-11-16 20:31:06,947 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3176 transitions. Word has length 17 [2022-11-16 20:31:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:06,947 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 3176 transitions. [2022-11-16 20:31:06,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:31:06,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3176 transitions. [2022-11-16 20:31:06,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:31:06,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:06,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:31:06,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-16 20:31:07,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-11-16 20:31:07,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:07,363 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 20:31:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash -888076042, now seen corresponding path program 9 times [2022-11-16 20:31:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:31:07,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937823431] [2022-11-16 20:31:07,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:31:07,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:31:07,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:31:07,364 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:31:07,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-16 20:31:07,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:31:07,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:07,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 20:31:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:07,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:31:07,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 40 [2022-11-16 20:31:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:31:08,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:08,435 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:31:08,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2022-11-16 20:31:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:31:10,997 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:31:10,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937823431] [2022-11-16 20:31:10,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937823431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:10,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194131582] [2022-11-16 20:31:10,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:31:10,997 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:31:10,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:31:10,998 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:31:11,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-16 20:31:11,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:31:11,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 20:31:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:31:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:31:11,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:31:11,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-16 20:31:11,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:31:11,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:31:12,482 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 50 treesize of output 18 [2022-11-16 20:31:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:31:12,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:31:12,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194131582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:12,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959474869] [2022-11-16 20:31:12,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:31:12,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:12,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:31:12,906 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:31:12,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2444939f-fed6-4a9e-b540-7cf4931d96b5/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-16 20:31:13,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:31:13,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 20:31:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:13,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:31:13,855 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 6 case distinctions, treesize of input 130 treesize of output 50 [2022-11-16 20:31:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:31:13,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:14,503 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 20:31:14,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 184 treesize of output 92