./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9 --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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- 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-6b4ec56 [2022-11-20 20:20:29,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:20:29,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:20:29,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:20:29,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:20:29,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:20:29,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:20:29,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:20:29,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:20:29,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:20:29,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:20:29,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:20:29,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:20:29,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:20:29,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:20:29,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:20:29,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:20:29,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:20:29,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:20:29,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:20:29,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:20:29,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:20:29,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:20:29,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:20:29,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:20:29,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:20:29,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:20:29,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:20:29,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:20:29,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:20:29,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:20:29,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:20:29,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:20:29,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:20:29,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:20:29,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:20:29,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:20:29,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:20:29,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:20:29,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:20:29,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:20:29,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 20:20:30,009 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:20:30,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:20:30,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:20:30,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:20:30,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:20:30,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:20:30,012 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:20:30,012 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:20:30,012 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:20:30,013 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:20:30,014 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:20:30,014 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:20:30,014 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:20:30,015 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:20:30,015 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:20:30,015 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:20:30,016 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:20:30,016 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:20:30,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:20:30,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:20:30,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:20:30,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:20:30,018 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:20:30,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:20:30,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:20:30,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:20:30,019 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:20:30,019 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:20:30,019 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:20:30,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:20:30,020 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:20:30,020 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:20:30,021 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:20:30,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:20:30,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:20:30,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:20:30,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:20:30,022 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:20:30,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:20:30,023 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:20:30,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:20:30,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:20:30,023 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_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2022-11-20 20:20:30,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:20:30,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:20:30,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:20:30,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:20:30,329 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:20:30,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-11-20 20:20:33,344 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:20:33,535 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:20:33,535 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-11-20 20:20:33,543 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/data/09e165fcd/330341ec557c4abaafe9ef6b10f69777/FLAGbada03173 [2022-11-20 20:20:33,558 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/data/09e165fcd/330341ec557c4abaafe9ef6b10f69777 [2022-11-20 20:20:33,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:20:33,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:20:33,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:20:33,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:20:33,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:20:33,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:20:33" (1/1) ... [2022-11-20 20:20:33,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699aeb50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:33, skipping insertion in model container [2022-11-20 20:20:33,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:20:33" (1/1) ... [2022-11-20 20:20:33,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:20:33,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:20:33,849 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-11-20 20:20:33,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:20:33,871 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) [2022-11-20 20:20:33,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b471bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:33, skipping insertion in model container [2022-11-20 20:20:33,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:20:33,873 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 20:20:33,875 INFO L158 Benchmark]: Toolchain (without parser) took 311.93ms. Allocated memory is still 127.9MB. Free memory was 87.1MB in the beginning and 97.0MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 20:20:33,876 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 102.8MB. Free memory is still 72.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:20:33,876 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.22ms. Allocated memory is still 127.9MB. Free memory was 87.1MB in the beginning and 97.0MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 20:20:33,878 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 102.8MB. Free memory is still 72.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.22ms. Allocated memory is still 127.9MB. Free memory was 87.1MB in the beginning and 97.0MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9 --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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- 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-6b4ec56 [2022-11-20 20:20:36,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:20:36,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:20:36,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:20:36,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:20:36,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:20:36,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:20:36,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:20:36,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:20:36,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:20:36,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:20:36,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:20:36,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:20:36,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:20:36,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:20:36,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:20:36,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:20:36,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:20:36,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:20:36,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:20:36,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:20:36,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:20:36,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:20:36,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:20:36,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:20:36,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:20:36,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:20:36,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:20:36,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:20:36,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:20:36,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:20:36,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:20:36,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:20:36,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:20:36,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:20:36,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:20:36,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:20:36,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:20:36,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:20:36,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:20:36,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:20:36,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 20:20:36,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:20:36,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:20:36,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:20:36,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:20:36,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:20:36,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:20:36,352 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:20:36,352 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:20:36,353 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:20:36,353 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:20:36,353 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:20:36,353 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:20:36,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:20:36,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:20:36,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:20:36,355 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:20:36,355 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:20:36,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:20:36,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:20:36,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:20:36,356 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:20:36,356 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:20:36,357 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:20:36,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:20:36,357 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:20:36,357 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:20:36,357 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:20:36,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:20:36,358 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:20:36,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:20:36,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:20:36,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:20:36,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:20:36,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:20:36,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:20:36,360 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:20:36,360 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:36,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:20:36,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:20:36,361 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_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2022-11-20 20:20:36,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:20:36,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:20:36,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:20:36,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:20:36,764 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:20:36,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-11-20 20:20:39,905 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:20:40,191 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:20:40,192 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-11-20 20:20:40,199 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/data/368ba4da2/63cb31f7faaa4453ae06e282fadc641a/FLAG34ca1b81c [2022-11-20 20:20:40,217 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/data/368ba4da2/63cb31f7faaa4453ae06e282fadc641a [2022-11-20 20:20:40,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:20:40,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:20:40,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:20:40,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:20:40,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:20:40,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5d8e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40, skipping insertion in model container [2022-11-20 20:20:40,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:20:40,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:20:40,468 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-11-20 20:20:40,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:20:40,498 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 20:20:40,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:20:40,551 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-11-20 20:20:40,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:20:40,567 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:20:40,604 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-11-20 20:20:40,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:20:40,625 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:20:40,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40 WrapperNode [2022-11-20 20:20:40,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:20:40,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:20:40,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:20:40,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:20:40,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,675 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 202 [2022-11-20 20:20:40,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:20:40,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:20:40,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:20:40,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:20:40,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,711 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:20:40,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:20:40,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:20:40,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:20:40,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (1/1) ... [2022-11-20 20:20:40,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:20:40,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:40,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:20:40,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:20:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:20:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:20:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:20:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 20:20:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 20:20:40,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 20:20:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 20:20:40,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 20:20:40,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 20:20:40,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:20:40,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:20:40,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:20:40,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 20:20:40,805 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:20:40,926 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:20:40,928 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:20:41,660 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:20:41,672 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:20:41,672 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 20:20:41,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:41 BoogieIcfgContainer [2022-11-20 20:20:41,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:20:41,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:20:41,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:20:41,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:20:41,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:20:40" (1/3) ... [2022-11-20 20:20:41,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac64c83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:20:41, skipping insertion in model container [2022-11-20 20:20:41,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:40" (2/3) ... [2022-11-20 20:20:41,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac64c83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:20:41, skipping insertion in model container [2022-11-20 20:20:41,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:41" (3/3) ... [2022-11-20 20:20:41,704 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2022-11-20 20:20:41,723 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:20:41,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-20 20:20:41,724 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:20:41,890 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 20:20:41,943 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:20:41,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 284 places, 301 transitions, 618 flow [2022-11-20 20:20:41,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 284 places, 301 transitions, 618 flow [2022-11-20 20:20:41,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 301 transitions, 618 flow [2022-11-20 20:20:42,099 INFO L130 PetriNetUnfolder]: 24/299 cut-off events. [2022-11-20 20:20:42,099 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 20:20:42,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 299 events. 24/299 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 690 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2022-11-20 20:20:42,129 INFO L119 LiptonReduction]: Number of co-enabled transitions 10684 [2022-11-20 20:22:13,285 INFO L134 LiptonReduction]: Checked pairs total: 10134 [2022-11-20 20:22:13,285 INFO L136 LiptonReduction]: Total number of compositions: 365 [2022-11-20 20:22:13,293 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 51 transitions, 118 flow [2022-11-20 20:22:13,346 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 534 states, 314 states have (on average 4.375796178343949) internal successors, (1374), 533 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:13,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:22:13,371 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;@5700b855, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:22:13,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2022-11-20 20:22:13,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 534 states, 314 states have (on average 4.375796178343949) internal successors, (1374), 533 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:22:13,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:13,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:22:13,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash 40301, now seen corresponding path program 1 times [2022-11-20 20:22:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930858965] [2022-11-20 20:22:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:13,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:13,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:13,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:13,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:22:13,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:13,710 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 20:22:13,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:13,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:13,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:13,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930858965] [2022-11-20 20:22:13,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930858965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:13,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:13,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:22:13,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547093353] [2022-11-20 20:22:13,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:13,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:13,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:13,769 INFO L87 Difference]: Start difference. First operand has 534 states, 314 states have (on average 4.375796178343949) internal successors, (1374), 533 states have internal predecessors, (1374), 0 states have call successors, (0), 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) [2022-11-20 20:22:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:14,346 INFO L93 Difference]: Finished difference Result 436 states and 1120 transitions. [2022-11-20 20:22:14,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:14,349 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 [2022-11-20 20:22:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:14,363 INFO L225 Difference]: With dead ends: 436 [2022-11-20 20:22:14,364 INFO L226 Difference]: Without dead ends: 436 [2022-11-20 20:22:14,365 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 [2022-11-20 20:22:14,368 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:14,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:22:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-20 20:22:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-11-20 20:22:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 262 states have (on average 4.2748091603053435) internal successors, (1120), 435 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1120 transitions. [2022-11-20 20:22:14,438 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1120 transitions. Word has length 2 [2022-11-20 20:22:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:14,439 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 1120 transitions. [2022-11-20 20:22:14,439 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) [2022-11-20 20:22:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1120 transitions. [2022-11-20 20:22:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:22:14,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:14,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:22:14,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:14,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:14,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash 40302, now seen corresponding path program 1 times [2022-11-20 20:22:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:14,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288431829] [2022-11-20 20:22:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:14,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:14,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:14,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:22:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:14,891 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:14,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:14,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:14,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:14,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288431829] [2022-11-20 20:22:14,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288431829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:14,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:14,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:22:14,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333634667] [2022-11-20 20:22:14,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:14,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:14,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:14,950 INFO L87 Difference]: Start difference. First operand 436 states and 1120 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) [2022-11-20 20:22:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:15,462 INFO L93 Difference]: Finished difference Result 437 states and 1124 transitions. [2022-11-20 20:22:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:15,463 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 [2022-11-20 20:22:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:15,467 INFO L225 Difference]: With dead ends: 437 [2022-11-20 20:22:15,468 INFO L226 Difference]: Without dead ends: 437 [2022-11-20 20:22:15,468 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 [2022-11-20 20:22:15,469 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:15,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 39 Unchecked, 0.5s Time] [2022-11-20 20:22:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-20 20:22:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-11-20 20:22:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 263 states have (on average 4.273764258555133) internal successors, (1124), 436 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1124 transitions. [2022-11-20 20:22:15,496 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1124 transitions. Word has length 2 [2022-11-20 20:22:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:15,497 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 1124 transitions. [2022-11-20 20:22:15,497 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) [2022-11-20 20:22:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1124 transitions. [2022-11-20 20:22:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:22:15,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:15,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:22:15,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:15,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:15,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash 40496, now seen corresponding path program 1 times [2022-11-20 20:22:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:15,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642868285] [2022-11-20 20:22:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:15,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:15,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:15,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:15,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:22:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:15,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:15,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642868285] [2022-11-20 20:22:15,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642868285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:15,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:15,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:22:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412055616] [2022-11-20 20:22:15,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:15,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:15,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:15,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:15,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:15,841 INFO L87 Difference]: Start difference. First operand 437 states and 1124 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) [2022-11-20 20:22:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:16,588 INFO L93 Difference]: Finished difference Result 437 states and 1121 transitions. [2022-11-20 20:22:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:16,589 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 [2022-11-20 20:22:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:16,593 INFO L225 Difference]: With dead ends: 437 [2022-11-20 20:22:16,593 INFO L226 Difference]: Without dead ends: 437 [2022-11-20 20:22:16,593 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 [2022-11-20 20:22:16,595 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:16,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:22:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-20 20:22:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-11-20 20:22:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 263 states have (on average 4.262357414448669) internal successors, (1121), 436 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1121 transitions. [2022-11-20 20:22:16,625 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1121 transitions. Word has length 2 [2022-11-20 20:22:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:16,626 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 1121 transitions. [2022-11-20 20:22:16,626 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) [2022-11-20 20:22:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1121 transitions. [2022-11-20 20:22:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:22:16,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:16,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:22:16,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:16,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:16,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1255626, now seen corresponding path program 1 times [2022-11-20 20:22:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:16,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174673593] [2022-11-20 20:22:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:16,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:16,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:16,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:22:16,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:17,023 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:17,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:17,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:17,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174673593] [2022-11-20 20:22:17,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174673593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:17,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744705207] [2022-11-20 20:22:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:17,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:17,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:17,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:17,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-20 20:22:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:17,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:22:17,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:17,622 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:17,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:17,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:17,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744705207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:17,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357242490] [2022-11-20 20:22:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:17,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:17,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:17,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:17,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:22:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:22:17,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:17,950 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:17,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:18,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:18,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357242490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:18,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:22:18,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-20 20:22:18,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650389952] [2022-11-20 20:22:18,157 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:18,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:22:18,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:22:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:18,158 INFO L87 Difference]: Start difference. First operand 437 states and 1121 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2022-11-20 20:22:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:20,979 INFO L93 Difference]: Finished difference Result 1306 states and 3361 transitions. [2022-11-20 20:22:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:22:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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 3 [2022-11-20 20:22:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:20,988 INFO L225 Difference]: With dead ends: 1306 [2022-11-20 20:22:20,988 INFO L226 Difference]: Without dead ends: 1306 [2022-11-20 20:22:20,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:22:20,990 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 309 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:20,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 10 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 20:22:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-11-20 20:22:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 440. [2022-11-20 20:22:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 266 states have (on average 4.2593984962406015) internal successors, (1133), 439 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1133 transitions. [2022-11-20 20:22:21,017 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1133 transitions. Word has length 3 [2022-11-20 20:22:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:21,018 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1133 transitions. [2022-11-20 20:22:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2022-11-20 20:22:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1133 transitions. [2022-11-20 20:22:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:22:21,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:21,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:22:21,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:21,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:21,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:21,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:21,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1255820, now seen corresponding path program 1 times [2022-11-20 20:22:21,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:21,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068016698] [2022-11-20 20:22:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:21,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:21,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:21,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 20:22:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:22:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:21,752 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-20 20:22:21,752 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 [2022-11-20 20:22:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:21,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:21,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:21,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068016698] [2022-11-20 20:22:21,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068016698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:21,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:21,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:22:21,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821020146] [2022-11-20 20:22:21,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:21,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:21,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:21,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:21,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:21,781 INFO L87 Difference]: Start difference. First operand 440 states and 1133 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:22,316 INFO L93 Difference]: Finished difference Result 354 states and 874 transitions. [2022-11-20 20:22:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:22:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:22,319 INFO L225 Difference]: With dead ends: 354 [2022-11-20 20:22:22,319 INFO L226 Difference]: Without dead ends: 354 [2022-11-20 20:22:22,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:22,320 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:22,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:22:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-20 20:22:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-20 20:22:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 226 states have (on average 3.8672566371681416) internal successors, (874), 353 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 874 transitions. [2022-11-20 20:22:22,332 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 874 transitions. Word has length 3 [2022-11-20 20:22:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:22,333 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 874 transitions. [2022-11-20 20:22:22,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 874 transitions. [2022-11-20 20:22:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:22:22,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:22,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:22:22,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:22,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:22,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:22,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1255822, now seen corresponding path program 1 times [2022-11-20 20:22:22,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:22,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54906180] [2022-11-20 20:22:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:22,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:22,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:22,549 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:22,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:22:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:22,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:22,716 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-20 20:22:22,717 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 14 treesize of output 26 [2022-11-20 20:22:22,728 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 [2022-11-20 20:22:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:22,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:22,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:22,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54906180] [2022-11-20 20:22:22,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54906180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:22,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:22,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:22:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383882456] [2022-11-20 20:22:22,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:22,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:22,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:22,839 INFO L87 Difference]: Start difference. First operand 354 states and 874 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:23,299 INFO L93 Difference]: Finished difference Result 353 states and 870 transitions. [2022-11-20 20:22:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:23,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:22:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:23,302 INFO L225 Difference]: With dead ends: 353 [2022-11-20 20:22:23,302 INFO L226 Difference]: Without dead ends: 353 [2022-11-20 20:22:23,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:23,303 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:23,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2022-11-20 20:22:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-20 20:22:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-11-20 20:22:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 226 states have (on average 3.849557522123894) internal successors, (870), 352 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 870 transitions. [2022-11-20 20:22:23,316 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 870 transitions. Word has length 3 [2022-11-20 20:22:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:23,316 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 870 transitions. [2022-11-20 20:22:23,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 870 transitions. [2022-11-20 20:22:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:22:23,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:23,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:22:23,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:23,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:23,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1206872428, now seen corresponding path program 1 times [2022-11-20 20:22:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:23,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911943618] [2022-11-20 20:22:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:23,530 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:23,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:23,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:22:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:23,679 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 20:22:23,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:23,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:23,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:23,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911943618] [2022-11-20 20:22:23,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911943618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:23,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:23,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:22:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391740631] [2022-11-20 20:22:23,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:23,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:23,710 INFO L87 Difference]: Start difference. First operand 353 states and 870 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:24,232 INFO L93 Difference]: Finished difference Result 331 states and 826 transitions. [2022-11-20 20:22:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 20:22:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:24,235 INFO L225 Difference]: With dead ends: 331 [2022-11-20 20:22:24,235 INFO L226 Difference]: Without dead ends: 331 [2022-11-20 20:22:24,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:24,236 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:24,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:22:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-20 20:22:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-11-20 20:22:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 222 states have (on average 3.720720720720721) internal successors, (826), 330 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 826 transitions. [2022-11-20 20:22:24,252 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 826 transitions. Word has length 5 [2022-11-20 20:22:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:24,252 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 826 transitions. [2022-11-20 20:22:24,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 826 transitions. [2022-11-20 20:22:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:22:24,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:24,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:22:24,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:24,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:24,465 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1206872427, now seen corresponding path program 1 times [2022-11-20 20:22:24,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:24,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807609401] [2022-11-20 20:22:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:24,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:24,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:24,467 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:24,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:24,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:22:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:24,658 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:24,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 20:22:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:24,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:25,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:25,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807609401] [2022-11-20 20:22:25,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807609401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:25,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1953388977] [2022-11-20 20:22:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:25,160 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:25,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:25,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:25,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-20 20:22:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:25,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:22:25,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:25,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:25,399 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-20 20:22:25,399 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-20 20:22:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:25,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:25,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1953388977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:25,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:22:25,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-20 20:22:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472846109] [2022-11-20 20:22:25,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:25,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:25,492 INFO L87 Difference]: Start difference. First operand 331 states and 826 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:25,998 INFO L93 Difference]: Finished difference Result 331 states and 829 transitions. [2022-11-20 20:22:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 20:22:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:26,000 INFO L225 Difference]: With dead ends: 331 [2022-11-20 20:22:26,000 INFO L226 Difference]: Without dead ends: 331 [2022-11-20 20:22:26,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:26,001 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:26,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-11-20 20:22:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-20 20:22:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-11-20 20:22:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 222 states have (on average 3.734234234234234) internal successors, (829), 330 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 829 transitions. [2022-11-20 20:22:26,012 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 829 transitions. Word has length 5 [2022-11-20 20:22:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:26,013 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 829 transitions. [2022-11-20 20:22:26,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 829 transitions. [2022-11-20 20:22:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:22:26,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:26,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:22:26,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:26,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:26,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:26,428 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1241672750, now seen corresponding path program 1 times [2022-11-20 20:22:26,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:26,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957521466] [2022-11-20 20:22:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:26,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:26,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:26,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:26,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:26,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:22:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:26,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:26,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-20 20:22:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:26,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:26,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957521466] [2022-11-20 20:22:26,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957521466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448639550] [2022-11-20 20:22:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:26,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:26,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:26,889 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:26,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-20 20:22:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:22:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:27,135 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:27,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 20:22:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:27,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:27,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448639550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:27,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685521532] [2022-11-20 20:22:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:27,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:27,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:27,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:27,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 20:22:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:22:27,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:27,939 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:27,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:28,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:28,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685521532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:28,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:22:28,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-20 20:22:28,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961768927] [2022-11-20 20:22:28,257 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:28,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 20:22:28,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:28,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 20:22:28,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:22:28,258 INFO L87 Difference]: Start difference. First operand 331 states and 829 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:30,330 INFO L93 Difference]: Finished difference Result 335 states and 836 transitions. [2022-11-20 20:22:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:22:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:22:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:30,333 INFO L225 Difference]: With dead ends: 335 [2022-11-20 20:22:30,333 INFO L226 Difference]: Without dead ends: 335 [2022-11-20 20:22:30,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:22:30,334 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:30,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 37 Unchecked, 1.7s Time] [2022-11-20 20:22:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-20 20:22:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2022-11-20 20:22:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 222 states have (on average 3.72972972972973) internal successors, (828), 330 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 828 transitions. [2022-11-20 20:22:30,344 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 828 transitions. Word has length 6 [2022-11-20 20:22:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:30,345 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 828 transitions. [2022-11-20 20:22:30,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 828 transitions. [2022-11-20 20:22:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:22:30,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:30,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:22:30,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:30,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:30,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:30,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:30,957 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:30,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:30,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1241672749, now seen corresponding path program 1 times [2022-11-20 20:22:30,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:30,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027414900] [2022-11-20 20:22:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:30,958 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:30,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:30,959 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:30,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 20:22:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:31,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:22:31,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:31,083 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 20:22:31,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:31,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:31,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027414900] [2022-11-20 20:22:31,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027414900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:31,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:31,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:22:31,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936888151] [2022-11-20 20:22:31,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:22:31,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:31,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:22:31,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:22:31,116 INFO L87 Difference]: Start difference. First operand 331 states and 828 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:31,532 INFO L93 Difference]: Finished difference Result 202 states and 495 transitions. [2022-11-20 20:22:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:22:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:22:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:31,534 INFO L225 Difference]: With dead ends: 202 [2022-11-20 20:22:31,535 INFO L226 Difference]: Without dead ends: 202 [2022-11-20 20:22:31,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:22:31,536 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:31,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:22:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-20 20:22:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-11-20 20:22:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 149 states have (on average 3.3221476510067114) internal successors, (495), 201 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 495 transitions. [2022-11-20 20:22:31,542 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 495 transitions. Word has length 6 [2022-11-20 20:22:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:31,543 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 495 transitions. [2022-11-20 20:22:31,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 495 transitions. [2022-11-20 20:22:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:22:31,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:31,544 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 20:22:31,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:31,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:31,756 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:31,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1242131346, now seen corresponding path program 2 times [2022-11-20 20:22:31,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:31,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320517112] [2022-11-20 20:22:31,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:22:31,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:31,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:31,758 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:31,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 20:22:31,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:22:31,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:22:31,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:31,955 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:31,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:32,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:33,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320517112] [2022-11-20 20:22:33,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320517112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [131334405] [2022-11-20 20:22:33,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:22:33,004 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:33,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:33,005 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:33,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-20 20:22:33,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:22:33,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:22:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:33,294 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:33,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:33,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:33,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [131334405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:33,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576602195] [2022-11-20 20:22:33,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:22:33,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:33,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:33,599 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:33,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 20:22:33,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:22:33,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:22:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:33,811 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:33,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:34,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:34,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576602195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:34,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:22:34,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-20 20:22:34,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071416483] [2022-11-20 20:22:34,253 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:34,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 20:22:34,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 20:22:34,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:22:34,255 INFO L87 Difference]: Start difference. First operand 202 states and 495 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:42,405 INFO L93 Difference]: Finished difference Result 1768 states and 4379 transitions. [2022-11-20 20:22:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:22:42,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:22:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:42,413 INFO L225 Difference]: With dead ends: 1768 [2022-11-20 20:22:42,414 INFO L226 Difference]: Without dead ends: 1768 [2022-11-20 20:22:42,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:22:42,415 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 812 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:42,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 66 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-20 20:22:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-11-20 20:22:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 208. [2022-11-20 20:22:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 155 states have (on average 3.270967741935484) internal successors, (507), 207 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) [2022-11-20 20:22:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 507 transitions. [2022-11-20 20:22:42,433 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 507 transitions. Word has length 6 [2022-11-20 20:22:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:42,433 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 507 transitions. [2022-11-20 20:22:42,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 507 transitions. [2022-11-20 20:22:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:22:42,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:42,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:42,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:42,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:42,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:43,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:43,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash 163262752, now seen corresponding path program 1 times [2022-11-20 20:22:43,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:43,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544082982] [2022-11-20 20:22:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:43,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:43,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:43,049 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:43,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:22:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:43,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:43,204 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:43,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544082982] [2022-11-20 20:22:43,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544082982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:43,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:43,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:22:43,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72110845] [2022-11-20 20:22:43,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:43,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:22:43,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:43,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:22:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:22:43,205 INFO L87 Difference]: Start difference. First operand 208 states and 507 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:43,604 INFO L93 Difference]: Finished difference Result 160 states and 363 transitions. [2022-11-20 20:22:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:22:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:43,606 INFO L225 Difference]: With dead ends: 160 [2022-11-20 20:22:43,606 INFO L226 Difference]: Without dead ends: 160 [2022-11-20 20:22:43,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:22:43,607 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:43,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:22:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-20 20:22:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-20 20:22:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 127 states have (on average 2.858267716535433) internal successors, (363), 159 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 363 transitions. [2022-11-20 20:22:43,612 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 363 transitions. Word has length 7 [2022-11-20 20:22:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:43,613 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 363 transitions. [2022-11-20 20:22:43,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 363 transitions. [2022-11-20 20:22:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:22:43,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:43,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:43,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:43,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:43,826 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 163257211, now seen corresponding path program 1 times [2022-11-20 20:22:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:43,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319108235] [2022-11-20 20:22:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:43,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:43,827 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:43,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:22:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:44,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:44,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-20 20:22:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:44,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:44,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319108235] [2022-11-20 20:22:44,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319108235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [547720206] [2022-11-20 20:22:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:44,326 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:44,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:44,327 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:44,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-20 20:22:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:44,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:22:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:44,565 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:44,566 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 [2022-11-20 20:22:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:44,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:45,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [547720206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:45,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922127044] [2022-11-20 20:22:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:45,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:45,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:45,158 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:45,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 20:22:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:22:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:45,335 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:45,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:45,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:45,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922127044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:45,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:22:45,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-20 20:22:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937775017] [2022-11-20 20:22:45,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 20:22:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 20:22:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:22:45,636 INFO L87 Difference]: Start difference. First operand 160 states and 363 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:47,724 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2022-11-20 20:22:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:22:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:22:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:47,726 INFO L225 Difference]: With dead ends: 167 [2022-11-20 20:22:47,726 INFO L226 Difference]: Without dead ends: 167 [2022-11-20 20:22:47,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:22:47,727 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:47,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 240 Invalid, 0 Unknown, 7 Unchecked, 1.8s Time] [2022-11-20 20:22:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-20 20:22:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2022-11-20 20:22:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 128 states have (on average 2.859375) internal successors, (366), 160 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) [2022-11-20 20:22:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 366 transitions. [2022-11-20 20:22:47,736 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 366 transitions. Word has length 7 [2022-11-20 20:22:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:47,736 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 366 transitions. [2022-11-20 20:22:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 366 transitions. [2022-11-20 20:22:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:22:47,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:47,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:47,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:47,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-20 20:22:48,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-20 20:22:48,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:48,349 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:48,350 INFO L85 PathProgramCache]: Analyzing trace with hash 162849255, now seen corresponding path program 1 times [2022-11-20 20:22:48,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:48,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568945292] [2022-11-20 20:22:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:48,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:48,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:48,351 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:48,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:48,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:22:48,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:48,542 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:48,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:48,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:49,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568945292] [2022-11-20 20:22:49,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568945292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:49,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121728582] [2022-11-20 20:22:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:49,027 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:49,031 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:49,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-20 20:22:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:49,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:22:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:49,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:49,262 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-20 20:22:49,262 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-20 20:22:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:49,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:49,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121728582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:49,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:22:49,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-20 20:22:49,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256891984] [2022-11-20 20:22:49,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:49,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:49,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:49,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:49,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:49,412 INFO L87 Difference]: Start difference. First operand 161 states and 366 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:49,784 INFO L93 Difference]: Finished difference Result 162 states and 367 transitions. [2022-11-20 20:22:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:49,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:22:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:49,786 INFO L225 Difference]: With dead ends: 162 [2022-11-20 20:22:49,786 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 20:22:49,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:49,787 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:49,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-20 20:22:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 20:22:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-20 20:22:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 129 states have (on average 2.8449612403100777) internal successors, (367), 161 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) [2022-11-20 20:22:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 367 transitions. [2022-11-20 20:22:49,791 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 367 transitions. Word has length 7 [2022-11-20 20:22:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:49,792 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 367 transitions. [2022-11-20 20:22:49,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 367 transitions. [2022-11-20 20:22:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:22:49,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:49,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:49,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:50,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:50,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:50,197 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash 162852320, now seen corresponding path program 1 times [2022-11-20 20:22:50,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:50,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156904682] [2022-11-20 20:22:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:50,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:50,199 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:50,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:50,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:22:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:50,379 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:50,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:50,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:51,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:51,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156904682] [2022-11-20 20:22:51,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156904682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:51,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1601042164] [2022-11-20 20:22:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:51,514 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:51,515 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:51,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-20 20:22:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:51,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:22:51,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:51,763 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:51,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 20:22:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:51,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:52,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1601042164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:52,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438313554] [2022-11-20 20:22:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:52,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:52,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:52,247 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:52,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 20:22:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:22:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:52,451 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:52,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 20:22:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:52,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:52,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438313554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:52,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:22:52,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 9 [2022-11-20 20:22:52,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537801239] [2022-11-20 20:22:52,944 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:52,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 20:22:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 20:22:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:22:52,946 INFO L87 Difference]: Start difference. First operand 162 states and 367 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:54,462 INFO L93 Difference]: Finished difference Result 244 states and 626 transitions. [2022-11-20 20:22:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:22:54,462 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:22:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:54,464 INFO L225 Difference]: With dead ends: 244 [2022-11-20 20:22:54,464 INFO L226 Difference]: Without dead ends: 244 [2022-11-20 20:22:54,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:22:54,465 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 107 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:54,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 16 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 130 Invalid, 0 Unknown, 153 Unchecked, 0.9s Time] [2022-11-20 20:22:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-20 20:22:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 208. [2022-11-20 20:22:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 175 states have (on average 3.005714285714286) internal successors, (526), 207 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 526 transitions. [2022-11-20 20:22:54,472 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 526 transitions. Word has length 7 [2022-11-20 20:22:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:54,472 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 526 transitions. [2022-11-20 20:22:54,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 526 transitions. [2022-11-20 20:22:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:22:54,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:54,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:54,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:54,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 20:22:54,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:55,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash 162852293, now seen corresponding path program 1 times [2022-11-20 20:22:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:55,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623319352] [2022-11-20 20:22:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:55,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:55,078 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:55,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 20:22:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:22:55,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:55,277 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:55,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:55,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:55,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:55,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623319352] [2022-11-20 20:22:55,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623319352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:55,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2062895154] [2022-11-20 20:22:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:55,781 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:55,782 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:55,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-20 20:22:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:55,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:22:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:55,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:56,033 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-20 20:22:56,033 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-20 20:22:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:56,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:56,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2062895154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:56,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:22:56,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-20 20:22:56,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654384256] [2022-11-20 20:22:56,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:56,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:56,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:56,154 INFO L87 Difference]: Start difference. First operand 208 states and 526 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:56,523 INFO L93 Difference]: Finished difference Result 206 states and 518 transitions. [2022-11-20 20:22:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:56,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:22:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:56,526 INFO L225 Difference]: With dead ends: 206 [2022-11-20 20:22:56,526 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 20:22:56,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:56,527 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:56,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-20 20:22:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 20:22:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-11-20 20:22:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 173 states have (on average 2.994219653179191) internal successors, (518), 205 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 518 transitions. [2022-11-20 20:22:56,533 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 518 transitions. Word has length 7 [2022-11-20 20:22:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:56,534 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 518 transitions. [2022-11-20 20:22:56,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 518 transitions. [2022-11-20 20:22:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:22:56,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:56,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:56,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:56,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-20 20:22:56,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:56,947 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash 753453465, now seen corresponding path program 1 times [2022-11-20 20:22:56,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:56,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634032385] [2022-11-20 20:22:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:56,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:56,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:56,949 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:56,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 20:22:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:57,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:22:57,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:57,182 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:57,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:57,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:22:57,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634032385] [2022-11-20 20:22:57,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634032385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:57,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1857294919] [2022-11-20 20:22:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:57,670 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:57,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:57,671 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:57,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-20 20:22:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:22:57,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:22:57,961 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-20 20:22:57,962 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-20 20:22:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:22:58,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:58,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1857294919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:58,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:22:58,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-20 20:22:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162130065] [2022-11-20 20:22:58,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:58,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:58,096 INFO L87 Difference]: Start difference. First operand 206 states and 518 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 20:22:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:58,435 INFO L93 Difference]: Finished difference Result 205 states and 516 transitions. [2022-11-20 20:22:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-20 20:22:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:58,437 INFO L225 Difference]: With dead ends: 205 [2022-11-20 20:22:58,437 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 20:22:58,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:58,438 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:58,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-11-20 20:22:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 20:22:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2022-11-20 20:22:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 169 states have (on average 3.0059171597633134) internal successors, (508), 200 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 508 transitions. [2022-11-20 20:22:58,445 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 508 transitions. Word has length 8 [2022-11-20 20:22:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:58,445 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 508 transitions. [2022-11-20 20:22:58,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 20:22:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 508 transitions. [2022-11-20 20:22:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:22:58,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:58,446 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:58,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:58,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-20 20:22:58,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:58,858 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:22:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:58,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1562798290, now seen corresponding path program 1 times [2022-11-20 20:22:58,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:58,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707458201] [2022-11-20 20:22:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:58,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:58,860 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:22:58,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:58,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:22:59,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:59,073 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:22:59,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:22:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:22:59,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:00,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707458201] [2022-11-20 20:23:00,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707458201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [213562278] [2022-11-20 20:23:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:00,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:23:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:23:00,574 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:23:00,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-20 20:23:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:23:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:00,930 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:23:00,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:23:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:01,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:02,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [213562278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:02,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803594335] [2022-11-20 20:23:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:02,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:23:02,439 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:23:02,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 20:23:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:23:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:02,665 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:23:02,665 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 [2022-11-20 20:23:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:02,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:03,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803594335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:03,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:23:03,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-20 20:23:03,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831044655] [2022-11-20 20:23:03,712 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:23:03,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 20:23:03,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:03,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 20:23:03,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:23:03,713 INFO L87 Difference]: Start difference. First operand 201 states and 508 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:09,796 INFO L93 Difference]: Finished difference Result 249 states and 666 transitions. [2022-11-20 20:23:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:23:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:23:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:09,799 INFO L225 Difference]: With dead ends: 249 [2022-11-20 20:23:09,799 INFO L226 Difference]: Without dead ends: 249 [2022-11-20 20:23:09,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:23:09,799 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:09,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 50 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 237 Unchecked, 0.8s Time] [2022-11-20 20:23:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-20 20:23:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 217. [2022-11-20 20:23:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 185 states have (on average 3.1621621621621623) internal successors, (585), 216 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 585 transitions. [2022-11-20 20:23:09,806 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 585 transitions. Word has length 9 [2022-11-20 20:23:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:09,806 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 585 transitions. [2022-11-20 20:23:09,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 585 transitions. [2022-11-20 20:23:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:23:09,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:09,808 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:09,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:10,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:23:10,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-20 20:23:10,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:10,411 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:10,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:10,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1123725920, now seen corresponding path program 2 times [2022-11-20 20:23:10,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:10,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401254018] [2022-11-20 20:23:10,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:23:10,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:10,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:10,420 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:10,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:23:10,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:23:10,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:23:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:10,672 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:23:10,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:23:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:23:10,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:23:10,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:10,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401254018] [2022-11-20 20:23:10,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401254018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:23:10,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:23:10,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:23:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812036391] [2022-11-20 20:23:10,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:23:10,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:23:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:23:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:23:10,859 INFO L87 Difference]: Start difference. First operand 217 states and 585 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:11,385 INFO L93 Difference]: Finished difference Result 107 states and 264 transitions. [2022-11-20 20:23:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:23:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:23:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:11,387 INFO L225 Difference]: With dead ends: 107 [2022-11-20 20:23:11,387 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 20:23:11,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:11,388 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:11,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:23:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 20:23:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2022-11-20 20:23:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 101 transitions. [2022-11-20 20:23:11,390 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 101 transitions. Word has length 9 [2022-11-20 20:23:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:11,390 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 101 transitions. [2022-11-20 20:23:11,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 101 transitions. [2022-11-20 20:23:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:23:11,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:11,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:11,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-20 20:23:11,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:11,591 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1775914864, now seen corresponding path program 1 times [2022-11-20 20:23:11,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:11,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720173324] [2022-11-20 20:23:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:11,592 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 [2022-11-20 20:23:11,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:11,593 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:11,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 20:23:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:11,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:23:11,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:11,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:23:11,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:11,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720173324] [2022-11-20 20:23:11,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720173324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:23:11,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:23:11,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:23:11,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647004970] [2022-11-20 20:23:11,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:23:11,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:23:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:11,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:23:11,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:23:11,807 INFO L87 Difference]: Start difference. First operand 49 states and 101 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:11,953 INFO L93 Difference]: Finished difference Result 46 states and 95 transitions. [2022-11-20 20:23:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:23:11,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:23:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:11,954 INFO L225 Difference]: With dead ends: 46 [2022-11-20 20:23:11,954 INFO L226 Difference]: Without dead ends: 46 [2022-11-20 20:23:11,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:23:11,955 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:11,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:23:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-20 20:23:11,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-20 20:23:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2022-11-20 20:23:11,957 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 11 [2022-11-20 20:23:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:11,957 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2022-11-20 20:23:11,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2022-11-20 20:23:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:23:11,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:11,958 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 20:23:11,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-20 20:23:12,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:12,167 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:12,167 INFO L85 PathProgramCache]: Analyzing trace with hash -536414482, now seen corresponding path program 3 times [2022-11-20 20:23:12,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:12,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696537116] [2022-11-20 20:23:12,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:23:12,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:12,169 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:12,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 20:23:12,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:23:12,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:23:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:12,493 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:23:12,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 20:23:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:13,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:16,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:16,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696537116] [2022-11-20 20:23:16,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696537116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:16,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1645616053] [2022-11-20 20:23:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:23:16,776 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:23:16,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:23:16,779 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:23:16,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-20 20:23:17,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:23:17,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:23:17,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:17,598 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:23:17,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:23:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:17,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:22,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1645616053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885658181] [2022-11-20 20:23:22,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:23:22,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:22,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:23:22,595 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:23:22,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 20:23:24,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:23:24,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:23:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:24,910 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 20:23:24,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 20:23:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:26,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:23:26,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885658181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:26,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:23:26,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-11-20 20:23:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320768801] [2022-11-20 20:23:26,621 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:23:26,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 20:23:26,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 20:23:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 20:23:26,623 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:51,501 INFO L93 Difference]: Finished difference Result 718 states and 1559 transitions. [2022-11-20 20:23:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 20:23:51,503 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:23:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:51,507 INFO L225 Difference]: With dead ends: 718 [2022-11-20 20:23:51,507 INFO L226 Difference]: Without dead ends: 718 [2022-11-20 20:23:51,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=941, Invalid=1921, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 20:23:51,509 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2340 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2340 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:51,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2340 Valid, 304 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-11-20 20:23:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-11-20 20:23:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 58. [2022-11-20 20:23:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 2.125) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2022-11-20 20:23:51,515 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 12 [2022-11-20 20:23:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:51,517 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2022-11-20 20:23:51,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2022-11-20 20:23:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:23:51,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:51,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:51,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:51,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-20 20:23:51,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-20 20:23:52,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:52,124 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1527198672, now seen corresponding path program 1 times [2022-11-20 20:23:52,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:52,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679790932] [2022-11-20 20:23:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:52,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:52,127 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:52,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-20 20:23:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:52,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:23:52,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:52,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:23:52,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679790932] [2022-11-20 20:23:52,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679790932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:23:52,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:23:52,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:23:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871459634] [2022-11-20 20:23:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:23:52,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:23:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:23:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:52,426 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:52,742 INFO L93 Difference]: Finished difference Result 78 states and 162 transitions. [2022-11-20 20:23:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:23:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:23:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:52,743 INFO L225 Difference]: With dead ends: 78 [2022-11-20 20:23:52,743 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 20:23:52,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:52,749 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:52,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:23:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 20:23:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-11-20 20:23:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 2.129032258064516) internal successors, (132), 63 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 132 transitions. [2022-11-20 20:23:52,756 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 132 transitions. Word has length 15 [2022-11-20 20:23:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:52,756 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 132 transitions. [2022-11-20 20:23:52,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 132 transitions. [2022-11-20 20:23:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:23:52,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:52,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:52,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:52,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:52,970 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:52,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:52,970 INFO L85 PathProgramCache]: Analyzing trace with hash -441423812, now seen corresponding path program 2 times [2022-11-20 20:23:52,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:52,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103362816] [2022-11-20 20:23:52,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:23:52,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:52,972 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:52,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:23:53,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:23:53,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:23:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:53,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:23:53,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103362816] [2022-11-20 20:23:53,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103362816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:23:53,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:23:53,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:23:53,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903427049] [2022-11-20 20:23:53,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:23:53,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:23:53,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:23:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:53,255 INFO L87 Difference]: Start difference. First operand 64 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:53,614 INFO L93 Difference]: Finished difference Result 76 states and 168 transitions. [2022-11-20 20:23:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:23:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:23:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:53,616 INFO L225 Difference]: With dead ends: 76 [2022-11-20 20:23:53,616 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 20:23:53,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:23:53,616 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:53,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 5 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:23:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 20:23:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-11-20 20:23:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 2.176470588235294) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2022-11-20 20:23:53,618 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2022-11-20 20:23:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:53,618 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2022-11-20 20:23:53,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2022-11-20 20:23:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:23:53,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:53,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:53,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:23:53,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:53,823 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash -719074758, now seen corresponding path program 3 times [2022-11-20 20:23:53,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:53,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840673757] [2022-11-20 20:23:53,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:23:53,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:53,825 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:53,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 20:23:54,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:23:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:23:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:54,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:23:54,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840673757] [2022-11-20 20:23:54,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840673757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:23:54,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:23:54,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:23:54,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991080952] [2022-11-20 20:23:54,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:23:54,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:23:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:23:54,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:54,082 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:54,518 INFO L93 Difference]: Finished difference Result 78 states and 171 transitions. [2022-11-20 20:23:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:23:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:23:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:54,520 INFO L225 Difference]: With dead ends: 78 [2022-11-20 20:23:54,520 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 20:23:54,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:54,521 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:54,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 5 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:23:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 20:23:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-11-20 20:23:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 2.176470588235294) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2022-11-20 20:23:54,523 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2022-11-20 20:23:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:54,524 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2022-11-20 20:23:54,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2022-11-20 20:23:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:23:54,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:54,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:54,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:54,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:54,738 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1216969550, now seen corresponding path program 4 times [2022-11-20 20:23:54,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:54,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638803994] [2022-11-20 20:23:54,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:23:54,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:54,740 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:54,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 20:23:54,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:23:54,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:23:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:54,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:23:54,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638803994] [2022-11-20 20:23:54,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638803994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:23:54,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:23:54,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:23:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160858558] [2022-11-20 20:23:54,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:23:54,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:23:54,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:23:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:54,976 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:55,622 INFO L93 Difference]: Finished difference Result 98 states and 207 transitions. [2022-11-20 20:23:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:23:55,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:23:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:55,624 INFO L225 Difference]: With dead ends: 98 [2022-11-20 20:23:55,624 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 20:23:55,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:23:55,624 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:55,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 8 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:23:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 20:23:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2022-11-20 20:23:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.1794871794871793) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2022-11-20 20:23:55,627 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 15 [2022-11-20 20:23:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:55,628 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2022-11-20 20:23:55,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2022-11-20 20:23:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:23:55,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:55,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:55,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-20 20:23:55,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:55,829 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash 401504178, now seen corresponding path program 5 times [2022-11-20 20:23:55,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:55,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393425945] [2022-11-20 20:23:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:23:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:55,831 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:55,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:23:55,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:23:55,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:55,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:23:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:56,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:23:56,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393425945] [2022-11-20 20:23:56,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393425945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:23:56,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:23:56,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:23:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619856200] [2022-11-20 20:23:56,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:23:56,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:23:56,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:23:56,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:56,068 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:56,796 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2022-11-20 20:23:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:23:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:23:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:56,798 INFO L225 Difference]: With dead ends: 104 [2022-11-20 20:23:56,798 INFO L226 Difference]: Without dead ends: 104 [2022-11-20 20:23:56,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:23:56,798 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:56,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 5 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:23:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-20 20:23:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2022-11-20 20:23:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 2.2375) internal successors, (179), 81 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 179 transitions. [2022-11-20 20:23:56,805 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 179 transitions. Word has length 15 [2022-11-20 20:23:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:56,805 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 179 transitions. [2022-11-20 20:23:56,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:56,805 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 179 transitions. [2022-11-20 20:23:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:23:56,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:56,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:56,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:23:57,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:57,021 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:57,021 INFO L85 PathProgramCache]: Analyzing trace with hash 123853232, now seen corresponding path program 6 times [2022-11-20 20:23:57,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:57,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572082633] [2022-11-20 20:23:57,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:23:57,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:57,022 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:57,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 20:23:57,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 20:23:57,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:23:57,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:23:57,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:57,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:23:57,331 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572082633] [2022-11-20 20:23:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572082633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:23:57,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:23:57,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:23:57,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593231941] [2022-11-20 20:23:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:23:57,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:23:57,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:57,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:23:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:57,333 INFO L87 Difference]: Start difference. First operand 82 states and 179 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:57,966 INFO L93 Difference]: Finished difference Result 102 states and 219 transitions. [2022-11-20 20:23:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:23:57,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:23:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:57,968 INFO L225 Difference]: With dead ends: 102 [2022-11-20 20:23:57,968 INFO L226 Difference]: Without dead ends: 102 [2022-11-20 20:23:57,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:23:57,969 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:57,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:23:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-20 20:23:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2022-11-20 20:23:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.1794871794871793) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2022-11-20 20:23:57,972 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 15 [2022-11-20 20:23:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:57,972 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2022-11-20 20:23:57,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:23:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2022-11-20 20:23:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:23:57,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:57,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:57,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:58,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:58,179 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:23:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2088855224, now seen corresponding path program 1 times [2022-11-20 20:23:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:58,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129237291] [2022-11-20 20:23:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:58,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:23:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:58,181 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:23:58,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 20:23:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:58,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:23:58,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:58,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:58,575 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 64 treesize of output 62 [2022-11-20 20:23:58,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-11-20 20:23:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:58,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:58,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129237291] [2022-11-20 20:23:58,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129237291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:58,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [206751260] [2022-11-20 20:23:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:58,685 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:23:58,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:23:58,686 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:23:58,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-20 20:23:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:23:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:59,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:59,107 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 64 treesize of output 62 [2022-11-20 20:23:59,115 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 62 treesize of output 60 [2022-11-20 20:23:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:59,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [206751260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:59,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748237711] [2022-11-20 20:23:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:59,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:59,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:23:59,191 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:23:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 20:23:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:59,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:23:59,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:59,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:59,540 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 64 treesize of output 62 [2022-11-20 20:23:59,544 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 62 treesize of output 60 [2022-11-20 20:23:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:23:59,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748237711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:59,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:23:59,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:23:59,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131872717] [2022-11-20 20:23:59,582 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:23:59,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:23:59,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:23:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:23:59,583 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:00,874 INFO L93 Difference]: Finished difference Result 148 states and 342 transitions. [2022-11-20 20:24:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:24:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:00,876 INFO L225 Difference]: With dead ends: 148 [2022-11-20 20:24:00,876 INFO L226 Difference]: Without dead ends: 148 [2022-11-20 20:24:00,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:24:00,877 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:00,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 27 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 83 Unchecked, 1.2s Time] [2022-11-20 20:24:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-20 20:24:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 88. [2022-11-20 20:24:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 2.2093023255813953) internal successors, (190), 87 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 190 transitions. [2022-11-20 20:24:00,885 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 190 transitions. Word has length 16 [2022-11-20 20:24:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:00,885 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 190 transitions. [2022-11-20 20:24:00,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 190 transitions. [2022-11-20 20:24:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:00,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:00,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:00,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:01,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-20 20:24:01,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-20 20:24:01,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:01,487 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1120337212, now seen corresponding path program 2 times [2022-11-20 20:24:01,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:01,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133959145] [2022-11-20 20:24:01,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:01,488 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:01,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:01,489 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:01,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 20:24:01,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:01,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:01,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:02,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:02,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133959145] [2022-11-20 20:24:02,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133959145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:02,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1997980113] [2022-11-20 20:24:02,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:02,008 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:02,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:02,011 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:02,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-20 20:24:02,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:02,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:02,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:02,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:02,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:02,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1997980113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723467458] [2022-11-20 20:24:02,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:02,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:02,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:02,695 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:02,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 20:24:02,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:02,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:02,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:03,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:03,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723467458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:03,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:03,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:03,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003798139] [2022-11-20 20:24:03,265 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:03,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:03,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:03,267 INFO L87 Difference]: Start difference. First operand 88 states and 190 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:04,082 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2022-11-20 20:24:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:24:04,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:04,083 INFO L225 Difference]: With dead ends: 131 [2022-11-20 20:24:04,083 INFO L226 Difference]: Without dead ends: 131 [2022-11-20 20:24:04,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:24:04,084 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:04,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 14 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 75 Unchecked, 0.7s Time] [2022-11-20 20:24:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-20 20:24:04,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 97. [2022-11-20 20:24:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 2.294736842105263) internal successors, (218), 96 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 218 transitions. [2022-11-20 20:24:04,088 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 218 transitions. Word has length 16 [2022-11-20 20:24:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:04,088 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 218 transitions. [2022-11-20 20:24:04,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 218 transitions. [2022-11-20 20:24:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:04,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:04,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:04,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:04,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-20 20:24:04,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-20 20:24:04,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:04,698 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:04,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1397988158, now seen corresponding path program 3 times [2022-11-20 20:24:04,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:04,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245990400] [2022-11-20 20:24:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:24:04,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:04,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:04,701 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:04,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-20 20:24:04,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:24:04,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:04,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:05,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:05,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2022-11-20 20:24:05,109 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 62 treesize of output 60 [2022-11-20 20:24:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:05,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:05,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245990400] [2022-11-20 20:24:05,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245990400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:05,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717489678] [2022-11-20 20:24:05,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:24:05,272 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:05,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:05,275 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:05,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-20 20:24:05,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:24:05,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:05,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:05,817 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 64 treesize of output 62 [2022-11-20 20:24:05,823 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 62 treesize of output 60 [2022-11-20 20:24:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:05,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [717489678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:05,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521284127] [2022-11-20 20:24:05,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:24:05,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:05,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:05,891 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:05,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-20 20:24:06,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:24:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:06,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:06,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:06,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:06,273 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 64 treesize of output 62 [2022-11-20 20:24:06,278 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 62 treesize of output 60 [2022-11-20 20:24:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:06,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521284127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:06,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:06,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785615007] [2022-11-20 20:24:06,332 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:06,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:06,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:06,333 INFO L87 Difference]: Start difference. First operand 97 states and 218 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:06,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:06,954 INFO L93 Difference]: Finished difference Result 144 states and 333 transitions. [2022-11-20 20:24:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:24:06,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:06,956 INFO L225 Difference]: With dead ends: 144 [2022-11-20 20:24:06,956 INFO L226 Difference]: Without dead ends: 144 [2022-11-20 20:24:06,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:24:06,957 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 67 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:06,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 11 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 97 Unchecked, 0.6s Time] [2022-11-20 20:24:06,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-20 20:24:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2022-11-20 20:24:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 2.294736842105263) internal successors, (218), 96 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 218 transitions. [2022-11-20 20:24:06,961 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 218 transitions. Word has length 16 [2022-11-20 20:24:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:06,961 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 218 transitions. [2022-11-20 20:24:06,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 218 transitions. [2022-11-20 20:24:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:06,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:06,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:06,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:07,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:07,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-20 20:24:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:07,562 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash -49604486, now seen corresponding path program 4 times [2022-11-20 20:24:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:07,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272632061] [2022-11-20 20:24:07,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:24:07,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:07,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:07,565 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:07,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 20:24:07,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:24:07,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:07,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:08,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:08,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272632061] [2022-11-20 20:24:08,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272632061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1422951929] [2022-11-20 20:24:08,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:24:08,087 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:08,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:08,088 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:08,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-20 20:24:08,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:24:08,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:08,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:08,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1422951929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:08,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813272584] [2022-11-20 20:24:08,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:24:08,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:08,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:08,605 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:08,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-20 20:24:08,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:24:08,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:08,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:08,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813272584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:08,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:08,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806213147] [2022-11-20 20:24:08,951 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:08,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:08,952 INFO L87 Difference]: Start difference. First operand 97 states and 218 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:09,682 INFO L93 Difference]: Finished difference Result 126 states and 286 transitions. [2022-11-20 20:24:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:24:09,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:09,685 INFO L225 Difference]: With dead ends: 126 [2022-11-20 20:24:09,685 INFO L226 Difference]: Without dead ends: 126 [2022-11-20 20:24:09,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:24:09,685 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:09,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 9 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 43 Unchecked, 0.7s Time] [2022-11-20 20:24:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-20 20:24:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2022-11-20 20:24:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 2.295238095238095) internal successors, (241), 106 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 241 transitions. [2022-11-20 20:24:09,689 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 241 transitions. Word has length 16 [2022-11-20 20:24:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:09,689 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 241 transitions. [2022-11-20 20:24:09,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 241 transitions. [2022-11-20 20:24:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:09,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:09,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:09,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-20 20:24:09,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-20 20:24:10,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-20 20:24:10,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:10,295 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash -68633158, now seen corresponding path program 5 times [2022-11-20 20:24:10,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:10,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254081260] [2022-11-20 20:24:10,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:24:10,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:10,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:10,297 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:10,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 20:24:10,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:10,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:10,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:10,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:10,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:10,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254081260] [2022-11-20 20:24:10,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254081260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:10,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2126690401] [2022-11-20 20:24:10,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:24:10,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:10,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:10,905 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:10,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-20 20:24:11,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:11,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:11,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:11,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:11,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:11,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2126690401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999247307] [2022-11-20 20:24:11,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:24:11,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:11,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:11,489 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:11,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-20 20:24:11,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:11,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:11,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:11,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999247307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:11,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:11,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:11,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930028424] [2022-11-20 20:24:11,867 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:11,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:11,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:11,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:11,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:11,868 INFO L87 Difference]: Start difference. First operand 107 states and 241 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:12,609 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2022-11-20 20:24:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:24:12,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:12,612 INFO L225 Difference]: With dead ends: 142 [2022-11-20 20:24:12,612 INFO L226 Difference]: Without dead ends: 142 [2022-11-20 20:24:12,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:24:12,613 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:12,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 7 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 64 Unchecked, 0.6s Time] [2022-11-20 20:24:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-20 20:24:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 112. [2022-11-20 20:24:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 110 states have (on average 2.390909090909091) internal successors, (263), 111 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 263 transitions. [2022-11-20 20:24:12,622 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 263 transitions. Word has length 16 [2022-11-20 20:24:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:12,623 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 263 transitions. [2022-11-20 20:24:12,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 263 transitions. [2022-11-20 20:24:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:12,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:12,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:12,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:12,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-20 20:24:13,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-20 20:24:13,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:13,229 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash -346284104, now seen corresponding path program 6 times [2022-11-20 20:24:13,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:13,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283858492] [2022-11-20 20:24:13,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:24:13,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:13,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:13,231 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:13,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 20:24:13,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 20:24:13,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:13,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:13,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:13,649 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 64 treesize of output 62 [2022-11-20 20:24:13,654 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 62 treesize of output 60 [2022-11-20 20:24:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:13,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283858492] [2022-11-20 20:24:13,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283858492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606204463] [2022-11-20 20:24:13,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:24:13,914 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:13,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:13,915 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:13,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-20 20:24:14,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 20:24:14,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:14,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:14,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:14,472 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 64 treesize of output 62 [2022-11-20 20:24:14,477 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 62 treesize of output 60 [2022-11-20 20:24:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:14,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [606204463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:14,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282571508] [2022-11-20 20:24:14,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:24:14,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:14,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:14,538 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:14,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-20 20:24:14,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 20:24:14,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:14,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:14,888 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 64 treesize of output 62 [2022-11-20 20:24:14,893 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 62 treesize of output 60 [2022-11-20 20:24:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:14,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282571508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:14,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:14,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564986207] [2022-11-20 20:24:14,969 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:14,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:14,970 INFO L87 Difference]: Start difference. First operand 112 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:15,511 INFO L93 Difference]: Finished difference Result 142 states and 331 transitions. [2022-11-20 20:24:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:24:15,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:15,513 INFO L225 Difference]: With dead ends: 142 [2022-11-20 20:24:15,513 INFO L226 Difference]: Without dead ends: 142 [2022-11-20 20:24:15,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:15,513 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:15,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 6 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-11-20 20:24:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-20 20:24:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2022-11-20 20:24:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 2.376146788990826) internal successors, (259), 110 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 259 transitions. [2022-11-20 20:24:15,516 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 259 transitions. Word has length 16 [2022-11-20 20:24:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:15,516 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 259 transitions. [2022-11-20 20:24:15,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 259 transitions. [2022-11-20 20:24:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:15,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:15,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:15,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:15,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2022-11-20 20:24:15,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-20 20:24:16,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:16,118 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 740713468, now seen corresponding path program 1 times [2022-11-20 20:24:16,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:16,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145031900] [2022-11-20 20:24:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:16,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:16,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:16,120 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:16,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 20:24:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:16,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:16,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:16,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145031900] [2022-11-20 20:24:16,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145031900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:16,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [70504678] [2022-11-20 20:24:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:16,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:16,752 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:16,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-20 20:24:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:17,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:17,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [70504678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809318149] [2022-11-20 20:24:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:17,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:17,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:17,263 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:17,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-20 20:24:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:17,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:17,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:17,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809318149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:17,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:17,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:17,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645851514] [2022-11-20 20:24:17,622 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:17,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:17,624 INFO L87 Difference]: Start difference. First operand 111 states and 259 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:18,282 INFO L93 Difference]: Finished difference Result 141 states and 336 transitions. [2022-11-20 20:24:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:24:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:18,284 INFO L225 Difference]: With dead ends: 141 [2022-11-20 20:24:18,284 INFO L226 Difference]: Without dead ends: 141 [2022-11-20 20:24:18,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:24:18,285 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:18,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 46 Unchecked, 0.6s Time] [2022-11-20 20:24:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-20 20:24:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2022-11-20 20:24:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 2.4513274336283186) internal successors, (277), 114 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 277 transitions. [2022-11-20 20:24:18,289 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 277 transitions. Word has length 16 [2022-11-20 20:24:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:18,289 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 277 transitions. [2022-11-20 20:24:18,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 277 transitions. [2022-11-20 20:24:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:18,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:18,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:18,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-20 20:24:18,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-20 20:24:18,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-20 20:24:18,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:18,900 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 463062522, now seen corresponding path program 2 times [2022-11-20 20:24:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:18,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511013378] [2022-11-20 20:24:18,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:18,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:18,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:18,903 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:18,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 20:24:19,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:19,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:19,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:19,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:19,351 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 64 treesize of output 62 [2022-11-20 20:24:19,357 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 62 treesize of output 60 [2022-11-20 20:24:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:19,654 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:19,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511013378] [2022-11-20 20:24:19,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511013378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:19,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1831678362] [2022-11-20 20:24:19,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:19,655 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:19,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:19,656 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:19,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-20 20:24:20,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:20,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:20,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:20,160 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 64 treesize of output 62 [2022-11-20 20:24:20,173 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 62 treesize of output 60 [2022-11-20 20:24:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:20,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1831678362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:20,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826241565] [2022-11-20 20:24:20,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:20,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:20,264 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:20,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-20 20:24:20,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:20,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:20,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:20,581 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 64 treesize of output 62 [2022-11-20 20:24:20,586 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 62 treesize of output 60 [2022-11-20 20:24:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:20,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826241565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:20,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:20,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:20,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480605075] [2022-11-20 20:24:20,646 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:20,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:20,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:20,647 INFO L87 Difference]: Start difference. First operand 115 states and 277 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:21,221 INFO L93 Difference]: Finished difference Result 159 states and 364 transitions. [2022-11-20 20:24:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:24:21,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:21,223 INFO L225 Difference]: With dead ends: 159 [2022-11-20 20:24:21,223 INFO L226 Difference]: Without dead ends: 159 [2022-11-20 20:24:21,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:24:21,223 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:21,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 5 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 91 Unchecked, 0.5s Time] [2022-11-20 20:24:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-20 20:24:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 114. [2022-11-20 20:24:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 112 states have (on average 2.4285714285714284) internal successors, (272), 113 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 272 transitions. [2022-11-20 20:24:21,227 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 272 transitions. Word has length 16 [2022-11-20 20:24:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:21,227 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 272 transitions. [2022-11-20 20:24:21,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 272 transitions. [2022-11-20 20:24:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:21,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:21,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:21,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:21,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-20 20:24:21,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2022-11-20 20:24:21,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:21,835 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1752024124, now seen corresponding path program 7 times [2022-11-20 20:24:21,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:21,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326246370] [2022-11-20 20:24:21,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:24:21,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:21,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:21,837 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:21,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 20:24:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:22,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:22,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:22,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326246370] [2022-11-20 20:24:22,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326246370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:22,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1302598295] [2022-11-20 20:24:22,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:24:22,409 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:22,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:22,410 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:22,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-20 20:24:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:22,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:22,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:22,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1302598295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:22,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26370168] [2022-11-20 20:24:22,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:24:22,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:22,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:22,976 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:22,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-20 20:24:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:23,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:23,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:23,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26370168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:23,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:23,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:23,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988774081] [2022-11-20 20:24:23,380 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:23,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:23,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:23,381 INFO L87 Difference]: Start difference. First operand 114 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:24,089 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2022-11-20 20:24:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:24:24,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:24,091 INFO L225 Difference]: With dead ends: 157 [2022-11-20 20:24:24,091 INFO L226 Difference]: Without dead ends: 157 [2022-11-20 20:24:24,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:24:24,092 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:24,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 7 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 46 Unchecked, 0.7s Time] [2022-11-20 20:24:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-20 20:24:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2022-11-20 20:24:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 2.456140350877193) internal successors, (280), 115 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2022-11-20 20:24:24,096 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 16 [2022-11-20 20:24:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:24,096 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2022-11-20 20:24:24,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2022-11-20 20:24:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:24,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:24,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:24,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-20 20:24:24,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-20 20:24:24,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2022-11-20 20:24:24,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:24,707 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2029675070, now seen corresponding path program 8 times [2022-11-20 20:24:24,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:24,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352331448] [2022-11-20 20:24:24,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:24,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:24,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:24,709 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:24,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 20:24:25,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:25,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:25,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:25,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:25,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2022-11-20 20:24:25,164 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 62 treesize of output 60 [2022-11-20 20:24:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:25,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352331448] [2022-11-20 20:24:25,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352331448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1059963418] [2022-11-20 20:24:25,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:25,422 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:25,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:25,423 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:25,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-20 20:24:25,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:25,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:26,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:26,062 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 64 treesize of output 62 [2022-11-20 20:24:26,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-11-20 20:24:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:26,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1059963418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:26,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568982717] [2022-11-20 20:24:26,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:26,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:24:26,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:26,135 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:24:26,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-20 20:24:26,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:26,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:24:26,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:26,525 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 64 treesize of output 62 [2022-11-20 20:24:26,530 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 62 treesize of output 60 [2022-11-20 20:24:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:24:26,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568982717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:26,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:24:26,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-20 20:24:26,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434792887] [2022-11-20 20:24:26,609 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:24:26,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:24:26,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:26,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:24:26,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:26,610 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:27,195 INFO L93 Difference]: Finished difference Result 168 states and 397 transitions. [2022-11-20 20:24:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:24:27,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:24:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:27,197 INFO L225 Difference]: With dead ends: 168 [2022-11-20 20:24:27,197 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 20:24:27,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:27,198 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:27,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 6 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 94 Unchecked, 0.6s Time] [2022-11-20 20:24:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 20:24:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 113. [2022-11-20 20:24:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 2.4054054054054053) internal successors, (267), 112 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 267 transitions. [2022-11-20 20:24:27,202 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 267 transitions. Word has length 16 [2022-11-20 20:24:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:27,203 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 267 transitions. [2022-11-20 20:24:27,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:24:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 267 transitions. [2022-11-20 20:24:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:24:27,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:27,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:27,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-20 20:24:27,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-20 20:24:27,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2022-11-20 20:24:27,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:27,815 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-20 20:24:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash -942677498, now seen corresponding path program 3 times [2022-11-20 20:24:27,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:27,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886439851] [2022-11-20 20:24:27,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:24:27,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:27,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:27,817 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:27,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f5030e2-e7f2-4ecc-bf32-b370eff22e87/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 20:24:28,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:24:28,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:24:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:28,919 INFO L321 Elim1Store]: treesize reduction 1164, result has 0.1 percent of original size [2022-11-20 20:24:28,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 537 treesize of output 415 [2022-11-20 20:24:28,935 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 406 treesize of output 398 [2022-11-20 20:24:28,952 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 398 treesize of output 390 [2022-11-20 20:24:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:29,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:29,392 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 639 treesize of output 631 [2022-11-20 20:24:29,412 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 631 treesize of output 623 [2022-11-20 20:25:44,411 WARN L233 SmtUtils]: Spent 54.34s on a formula simplification. DAG size of input: 173 DAG size of output: 162 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:25:50,487 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 471 DAG size of output: 135 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-20 20:25:50,488 INFO L321 Elim1Store]: treesize reduction 972, result has 22.7 percent of original size [2022-11-20 20:25:50,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 2235 treesize of output 577