./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS --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 b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --- 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-8393723 [2022-11-19 08:28:09,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:28:09,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:28:09,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:28:09,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:28:09,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:28:09,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:28:09,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:28:09,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:28:09,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:28:09,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:28:09,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:28:09,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:28:09,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:28:09,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:28:09,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:28:09,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:28:09,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:28:09,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:28:09,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:28:10,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:28:10,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:28:10,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:28:10,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:28:10,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:28:10,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:28:10,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:28:10,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:28:10,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:28:10,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:28:10,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:28:10,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:28:10,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:28:10,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:28:10,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:28:10,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:28:10,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:28:10,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:28:10,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:28:10,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:28:10,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:28:10,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:28:10,080 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:28:10,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:28:10,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:28:10,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:28:10,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:28:10,082 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:28:10,083 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:28:10,083 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:28:10,083 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:28:10,083 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:28:10,085 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:28:10,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:28:10,085 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:28:10,085 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:28:10,085 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:28:10,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:28:10,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:28:10,086 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:28:10,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:28:10,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:28:10,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:28:10,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:28:10,088 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:28:10,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:28:10,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:28:10,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:28:10,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:28:10,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:28:10,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:28:10,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:28:10,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:28:10,092 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:28:10,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:28:10,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:28:10,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:28:10,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:28:10,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:28:10,093 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:28:10,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:28:10,094 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:28:10,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:28:10,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:28:10,094 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_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 [2022-11-19 08:28:10,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:28:10,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:28:10,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:28:10,430 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:28:10,431 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:28:10,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2022-11-19 08:28:10,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data/cad7d2518/bc79296597c242f590de43dcc1fcf279/FLAG5bc4107b9 [2022-11-19 08:28:11,008 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:28:11,009 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2022-11-19 08:28:11,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data/cad7d2518/bc79296597c242f590de43dcc1fcf279/FLAG5bc4107b9 [2022-11-19 08:28:11,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data/cad7d2518/bc79296597c242f590de43dcc1fcf279 [2022-11-19 08:28:11,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:28:11,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:28:11,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:28:11,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:28:11,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:28:11,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:28:11" (1/1) ... [2022-11-19 08:28:11,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3f12a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:11, skipping insertion in model container [2022-11-19 08:28:11,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:28:11" (1/1) ... [2022-11-19 08:28:11,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:28:11,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:28:11,724 WARN L234 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_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2022-11-19 08:28:11,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:28:11,747 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) [2022-11-19 08:28:11,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ee22004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:11, skipping insertion in model container [2022-11-19 08:28:11,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:28:11,748 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 08:28:11,750 INFO L158 Benchmark]: Toolchain (without parser) took 360.78ms. Allocated memory is still 127.9MB. Free memory was 93.2MB in the beginning and 102.5MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:28:11,751 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 88.1MB. Free memory was 40.9MB in the beginning and 40.8MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:28:11,752 INFO L158 Benchmark]: CACSL2BoogieTranslator took 355.68ms. Allocated memory is still 127.9MB. Free memory was 93.2MB in the beginning and 102.5MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:28:11,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 88.1MB. Free memory was 40.9MB in the beginning and 40.8MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 355.68ms. Allocated memory is still 127.9MB. Free memory was 93.2MB in the beginning and 102.5MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS --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 b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --- 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-8393723 [2022-11-19 08:28:14,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:28:14,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:28:14,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:28:14,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:28:14,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:28:14,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:28:14,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:28:14,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:28:14,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:28:14,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:28:14,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:28:14,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:28:14,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:28:14,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:28:14,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:28:14,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:28:14,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:28:14,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:28:14,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:28:14,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:28:14,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:28:14,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:28:14,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:28:14,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:28:14,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:28:14,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:28:14,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:28:14,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:28:14,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:28:14,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:28:14,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:28:14,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:28:14,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:28:14,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:28:14,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:28:14,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:28:14,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:28:14,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:28:14,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:28:14,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:28:14,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 08:28:14,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:28:14,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:28:14,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:28:14,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:28:14,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:28:14,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:28:14,231 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:28:14,231 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:28:14,231 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:28:14,231 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:28:14,233 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:28:14,233 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:28:14,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:28:14,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:28:14,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:28:14,235 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:28:14,236 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:28:14,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:28:14,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:28:14,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:28:14,237 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:28:14,237 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:28:14,237 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:28:14,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:28:14,238 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:28:14,238 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 08:28:14,238 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 08:28:14,238 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:28:14,239 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:28:14,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:28:14,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 08:28:14,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:28:14,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:28:14,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:28:14,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:28:14,241 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 08:28:14,241 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 08:28:14,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:28:14,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 08:28:14,242 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_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 [2022-11-19 08:28:14,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:28:14,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:28:14,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:28:14,668 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:28:14,669 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:28:14,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2022-11-19 08:28:14,751 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data/9b719134a/95d7b0543c034d2296ef1d2581515f88/FLAGe92c21b44 [2022-11-19 08:28:15,270 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:28:15,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2022-11-19 08:28:15,281 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data/9b719134a/95d7b0543c034d2296ef1d2581515f88/FLAGe92c21b44 [2022-11-19 08:28:15,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/data/9b719134a/95d7b0543c034d2296ef1d2581515f88 [2022-11-19 08:28:15,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:28:15,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:28:15,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:28:15,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:28:15,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:28:15,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:28:15" (1/1) ... [2022-11-19 08:28:15,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46eae746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:15, skipping insertion in model container [2022-11-19 08:28:15,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:28:15" (1/1) ... [2022-11-19 08:28:15,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:28:15,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:28:15,970 WARN L234 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_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2022-11-19 08:28:15,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:28:16,009 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 08:28:16,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:28:16,032 WARN L234 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_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2022-11-19 08:28:16,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:28:16,043 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:28:16,080 WARN L234 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_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2022-11-19 08:28:16,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:28:16,106 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:28:16,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16 WrapperNode [2022-11-19 08:28:16,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:28:16,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:28:16,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:28:16,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:28:16,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,164 INFO L138 Inliner]: procedures = 28, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 269 [2022-11-19 08:28:16,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:28:16,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:28:16,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:28:16,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:28:16,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:28:16,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:28:16,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:28:16,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:28:16,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (1/1) ... [2022-11-19 08:28:16,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:28:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:16,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:28:16,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:28:16,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:28:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 08:28:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:28:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 08:28:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 08:28:16,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 08:28:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 08:28:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 08:28:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 08:28:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 08:28:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:28:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:28:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:28:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:28:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 08:28:16,316 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 08:28:16,506 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:28:16,509 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:28:17,453 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:28:17,479 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:28:17,480 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 08:28:17,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:28:17 BoogieIcfgContainer [2022-11-19 08:28:17,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:28:17,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:28:17,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:28:17,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:28:17,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:28:15" (1/3) ... [2022-11-19 08:28:17,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563fac87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:28:17, skipping insertion in model container [2022-11-19 08:28:17,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:16" (2/3) ... [2022-11-19 08:28:17,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563fac87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:28:17, skipping insertion in model container [2022-11-19 08:28:17,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:28:17" (3/3) ... [2022-11-19 08:28:17,491 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2022-11-19 08:28:17,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:28:17,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-19 08:28:17,520 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 08:28:17,792 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 08:28:17,829 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 08:28:17,843 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 373 places, 392 transitions, 808 flow [2022-11-19 08:28:17,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 373 places, 392 transitions, 808 flow [2022-11-19 08:28:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 392 transitions, 808 flow [2022-11-19 08:28:18,076 INFO L130 PetriNetUnfolder]: 29/389 cut-off events. [2022-11-19 08:28:18,076 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-19 08:28:18,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 389 events. 29/389 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 730 event pairs, 0 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 288. Up to 2 conditions per place. [2022-11-19 08:28:18,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 24864 [2022-11-19 08:29:05,076 INFO L134 LiptonReduction]: Checked pairs total: 26706 [2022-11-19 08:29:05,077 INFO L136 LiptonReduction]: Total number of compositions: 469 [2022-11-19 08:29:05,089 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 69 places, 65 transitions, 154 flow [2022-11-19 08:29:05,301 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2348 states, 1844 states have (on average 4.500542299349241) internal successors, (8299), 2347 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:05,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:29:05,338 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;@56170541, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:29:05,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-19 08:29:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 2348 states, 1844 states have (on average 4.500542299349241) internal successors, (8299), 2347 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:29:05,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:05,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:29:05,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:29:05,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash 50231, now seen corresponding path program 1 times [2022-11-19 08:29:05,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:29:05,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489172930] [2022-11-19 08:29:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:05,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:29:05,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:29:05,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:29:05,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:29:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:05,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:29:05,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:05,784 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:29:05,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:29:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:05,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:29:05,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:29:05,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489172930] [2022-11-19 08:29:05,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489172930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:05,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:05,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:29:05,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145419447] [2022-11-19 08:29:05,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:05,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:29:05,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:29:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:29:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:05,865 INFO L87 Difference]: Start difference. First operand has 2348 states, 1844 states have (on average 4.500542299349241) internal successors, (8299), 2347 states have internal predecessors, (8299), 0 states have call successors, (0), 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) [2022-11-19 08:29:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:06,346 INFO L93 Difference]: Finished difference Result 2344 states and 8295 transitions. [2022-11-19 08:29:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:06,361 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 [2022-11-19 08:29:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:06,420 INFO L225 Difference]: With dead ends: 2344 [2022-11-19 08:29:06,420 INFO L226 Difference]: Without dead ends: 2344 [2022-11-19 08:29:06,421 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 [2022-11-19 08:29:06,427 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:06,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:29:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-11-19 08:29:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2022-11-19 08:29:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1844 states have (on average 4.498373101952278) internal successors, (8295), 2343 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8295 transitions. [2022-11-19 08:29:06,674 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8295 transitions. Word has length 2 [2022-11-19 08:29:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:06,675 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 8295 transitions. [2022-11-19 08:29:06,675 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) [2022-11-19 08:29:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8295 transitions. [2022-11-19 08:29:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:29:06,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:06,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:29:06,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-19 08:29:06,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:29:06,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:29:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash 50232, now seen corresponding path program 1 times [2022-11-19 08:29:06,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:29:06,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181022975] [2022-11-19 08:29:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:06,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:29:06,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:29:06,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:29:06,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:29:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:07,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:29:07,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:07,203 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:29:07,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:29:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:07,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:29:07,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:29:07,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181022975] [2022-11-19 08:29:07,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181022975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:07,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:07,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:29:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637641185] [2022-11-19 08:29:07,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:07,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:29:07,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:29:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:29:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:07,256 INFO L87 Difference]: Start difference. First operand 2344 states and 8295 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) [2022-11-19 08:29:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:08,053 INFO L93 Difference]: Finished difference Result 4684 states and 16586 transitions. [2022-11-19 08:29:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:08,054 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 [2022-11-19 08:29:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:08,191 INFO L225 Difference]: With dead ends: 4684 [2022-11-19 08:29:08,192 INFO L226 Difference]: Without dead ends: 4684 [2022-11-19 08:29:08,192 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 [2022-11-19 08:29:08,200 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:08,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:29:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-11-19 08:29:08,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 2347. [2022-11-19 08:29:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 1847 states have (on average 4.495397942609637) internal successors, (8303), 2346 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8303 transitions. [2022-11-19 08:29:08,588 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8303 transitions. Word has length 2 [2022-11-19 08:29:08,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:08,588 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 8303 transitions. [2022-11-19 08:29:08,589 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) [2022-11-19 08:29:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8303 transitions. [2022-11-19 08:29:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:29:08,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:08,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:29:08,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:29:08,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:29:08,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:29:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:08,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1564241, now seen corresponding path program 1 times [2022-11-19 08:29:08,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:29:08,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134413343] [2022-11-19 08:29:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:08,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:29:08,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:29:08,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:29:08,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:29:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:08,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:29:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:09,045 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:29:09,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:29:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:09,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:29:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:09,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:29:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134413343] [2022-11-19 08:29:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134413343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:29:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [136898619] [2022-11-19 08:29:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:09,383 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:29:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:29:09,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:29:09,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-19 08:29:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:09,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:29:09,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:09,691 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:29:09,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:29:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:09,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:29:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:09,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [136898619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:29:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426076651] [2022-11-19 08:29:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:09,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:09,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:09,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:29:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:09,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:29:09,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:10,090 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:29:10,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:29:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:10,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:29:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:10,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426076651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:29:10,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:29:10,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 4 [2022-11-19 08:29:10,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055740577] [2022-11-19 08:29:10,186 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:29:10,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:29:10,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:29:10,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:29:10,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:29:10,188 INFO L87 Difference]: Start difference. First operand 2347 states and 8303 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:12,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:14,979 INFO L93 Difference]: Finished difference Result 11704 states and 41459 transitions. [2022-11-19 08:29:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:29:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:29:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:15,089 INFO L225 Difference]: With dead ends: 11704 [2022-11-19 08:29:15,089 INFO L226 Difference]: Without dead ends: 11704 [2022-11-19 08:29:15,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:29:15,090 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 384 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:15,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 0 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-19 08:29:15,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11704 states. [2022-11-19 08:29:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11704 to 2356. [2022-11-19 08:29:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 1856 states have (on average 4.486530172413793) internal successors, (8327), 2355 states have internal predecessors, (8327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8327 transitions. [2022-11-19 08:29:15,509 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8327 transitions. Word has length 3 [2022-11-19 08:29:15,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:15,510 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 8327 transitions. [2022-11-19 08:29:15,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8327 transitions. [2022-11-19 08:29:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:29:15,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:15,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:29:15,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-19 08:29:15,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:29:15,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:29:16,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:16,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:29:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash 48609611, now seen corresponding path program 1 times [2022-11-19 08:29:16,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:29:16,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536409106] [2022-11-19 08:29:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:16,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:29:16,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:29:16,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:29:16,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-19 08:29:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:16,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:29:16,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:16,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:29:16,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:29:16,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536409106] [2022-11-19 08:29:16,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536409106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:16,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:16,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:29:16,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527396017] [2022-11-19 08:29:16,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:16,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:29:16,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:29:16,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:29:16,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:16,330 INFO L87 Difference]: Start difference. First operand 2356 states and 8327 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:16,768 INFO L93 Difference]: Finished difference Result 2356 states and 8322 transitions. [2022-11-19 08:29:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:29:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:16,786 INFO L225 Difference]: With dead ends: 2356 [2022-11-19 08:29:16,787 INFO L226 Difference]: Without dead ends: 2356 [2022-11-19 08:29:16,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:16,788 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:16,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:29:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-19 08:29:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2356. [2022-11-19 08:29:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 1856 states have (on average 4.483836206896552) internal successors, (8322), 2355 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8322 transitions. [2022-11-19 08:29:16,929 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8322 transitions. Word has length 4 [2022-11-19 08:29:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:16,929 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 8322 transitions. [2022-11-19 08:29:16,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8322 transitions. [2022-11-19 08:29:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:29:16,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:16,930 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 08:29:16,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-19 08:29:17,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:29:17,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:29:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash -637336968, now seen corresponding path program 2 times [2022-11-19 08:29:17,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:29:17,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727302567] [2022-11-19 08:29:17,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:29:17,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:29:17,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:29:17,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:29:17,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:29:17,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:29:17,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:29:17,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:29:17,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:17,393 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:29:17,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:29:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:17,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:29:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:18,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:29:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727302567] [2022-11-19 08:29:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727302567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:29:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350637611] [2022-11-19 08:29:18,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:29:18,392 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:29:18,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:29:18,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:29:18,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 08:29:18,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:29:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:29:18,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:29:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:18,821 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:29:18,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:29:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:19,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:29:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:19,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1350637611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:29:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106723213] [2022-11-19 08:29:19,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:29:19,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:19,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:19,677 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:19,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:29:19,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:29:19,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:29:19,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:29:19,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:19,922 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:29:19,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:29:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:20,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:29:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:20,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106723213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:29:20,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:29:20,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 24 [2022-11-19 08:29:20,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123914686] [2022-11-19 08:29:20,997 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:29:20,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:29:20,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:29:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:29:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:29:20,999 INFO L87 Difference]: Start difference. First operand 2356 states and 8322 transitions. Second operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:29:23,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:25,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:26,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:29,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:31,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:32,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:33,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:35,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:37,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:38,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:39,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:40,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:42,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:43,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:44,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:45,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:47,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:48,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:49,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:51,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:53,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:54,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:56,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:57,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:58,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:00,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:01,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:02,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:04,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:05,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:08,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:09,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:11,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:18,094 INFO L93 Difference]: Finished difference Result 14059 states and 49765 transitions. [2022-11-19 08:30:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:30:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:30:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:18,201 INFO L225 Difference]: With dead ends: 14059 [2022-11-19 08:30:18,202 INFO L226 Difference]: Without dead ends: 14059 [2022-11-19 08:30:18,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:30:18,203 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1245 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:18,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 0 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 55.2s Time] [2022-11-19 08:30:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14059 states. [2022-11-19 08:30:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14059 to 2374. [2022-11-19 08:30:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 1874 states have (on average 4.4557097118463185) internal successors, (8350), 2373 states have internal predecessors, (8350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 8350 transitions. [2022-11-19 08:30:18,500 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 8350 transitions. Word has length 6 [2022-11-19 08:30:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:18,500 INFO L495 AbstractCegarLoop]: Abstraction has 2374 states and 8350 transitions. [2022-11-19 08:30:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 8350 transitions. [2022-11-19 08:30:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:30:18,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:18,502 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 08:30:18,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:18,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:30:18,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:19,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:19,107 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 834290648, now seen corresponding path program 3 times [2022-11-19 08:30:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052572086] [2022-11-19 08:30:19,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:30:19,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:19,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:19,110 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:19,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:19,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:30:19,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:30:19,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:30:19,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:30:19,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:30:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:30:19,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:19,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052572086] [2022-11-19 08:30:19,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052572086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:30:19,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419642620] [2022-11-19 08:30:19,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:30:19,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:30:19,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:30:19,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:30:19,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-19 08:30:20,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:30:20,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:30:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:30:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:30:20,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:30:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:30:20,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [419642620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:30:20,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003467693] [2022-11-19 08:30:20,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:30:20,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:20,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:30:20,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:30:20,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:30:21,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:30:21,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:30:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:30:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:22,097 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:30:22,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:30:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:30:22,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:30:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:30:26,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003467693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:30:26,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:30:26,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 11, 11] total 34 [2022-11-19 08:30:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425563587] [2022-11-19 08:30:26,231 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:30:26,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 08:30:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 08:30:26,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:30:26,233 INFO L87 Difference]: Start difference. First operand 2374 states and 8350 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:28,242 INFO L93 Difference]: Finished difference Result 2356 states and 8304 transitions. [2022-11-19 08:30:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:30:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2022-11-19 08:30:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:28,255 INFO L225 Difference]: With dead ends: 2356 [2022-11-19 08:30:28,255 INFO L226 Difference]: Without dead ends: 2356 [2022-11-19 08:30:28,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 08:30:28,257 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 432 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:28,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 0 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 08:30:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-19 08:30:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2356. [2022-11-19 08:30:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 1859 states have (on average 4.466917697686928) internal successors, (8304), 2355 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8304 transitions. [2022-11-19 08:30:28,331 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8304 transitions. Word has length 12 [2022-11-19 08:30:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:28,332 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 8304 transitions. [2022-11-19 08:30:28,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8304 transitions. [2022-11-19 08:30:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:30:28,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:28,333 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-11-19 08:30:28,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:30:28,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:28,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:28,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:28,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:28,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:28,955 INFO L85 PathProgramCache]: Analyzing trace with hash -694755404, now seen corresponding path program 1 times [2022-11-19 08:30:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:28,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580886159] [2022-11-19 08:30:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:28,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:28,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:28,957 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:28,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 08:30:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:30:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:29,501 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 08:30:29,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 08:30:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:30,114 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:30:30,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-19 08:30:32,956 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-19 08:30:32,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-19 08:30:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:34,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:34,104 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580886159] [2022-11-19 08:30:34,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580886159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:34,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:34,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:30:34,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523876423] [2022-11-19 08:30:34,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:34,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=6, Unknown=1, NotChecked=0, Total=12 [2022-11-19 08:30:34,106 INFO L87 Difference]: Start difference. First operand 2356 states and 8304 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) [2022-11-19 08:30:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:34,397 INFO L93 Difference]: Finished difference Result 2355 states and 8303 transitions. [2022-11-19 08:30:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:30:34,398 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 19 [2022-11-19 08:30:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:34,410 INFO L225 Difference]: With dead ends: 2355 [2022-11-19 08:30:34,410 INFO L226 Difference]: Without dead ends: 2355 [2022-11-19 08:30:34,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5, Invalid=6, Unknown=1, NotChecked=0, Total=12 [2022-11-19 08:30:34,411 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:34,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2022-11-19 08:30:34,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-11-19 08:30:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-11-19 08:30:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 1859 states have (on average 4.466379774072082) internal successors, (8303), 2354 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8303 transitions. [2022-11-19 08:30:34,481 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8303 transitions. Word has length 19 [2022-11-19 08:30:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:34,482 INFO L495 AbstractCegarLoop]: Abstraction has 2355 states and 8303 transitions. [2022-11-19 08:30:34,482 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) [2022-11-19 08:30:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8303 transitions. [2022-11-19 08:30:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:30:34,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:34,483 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-11-19 08:30:34,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:34,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:34,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:34,708 INFO L85 PathProgramCache]: Analyzing trace with hash -694755403, now seen corresponding path program 1 times [2022-11-19 08:30:34,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:34,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819024570] [2022-11-19 08:30:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:34,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:34,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:34,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 08:30:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:35,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:30:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:35,319 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 08:30:35,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-19 08:30:35,376 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 08:30:35,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 08:30:35,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:35,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:30:35,679 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:30:35,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:30:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:35,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:35,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:35,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819024570] [2022-11-19 08:30:35,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819024570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:35,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:35,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:30:35,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705386832] [2022-11-19 08:30:35,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:35,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:30:35,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:30:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:35,850 INFO L87 Difference]: Start difference. First operand 2355 states and 8303 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:36,285 INFO L93 Difference]: Finished difference Result 2354 states and 8302 transitions. [2022-11-19 08:30:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 08:30:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:36,298 INFO L225 Difference]: With dead ends: 2354 [2022-11-19 08:30:36,298 INFO L226 Difference]: Without dead ends: 2354 [2022-11-19 08:30:36,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:30:36,299 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:36,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-11-19 08:30:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2022-11-19 08:30:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2354. [2022-11-19 08:30:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 1859 states have (on average 4.4658418504572355) internal successors, (8302), 2353 states have internal predecessors, (8302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 8302 transitions. [2022-11-19 08:30:36,408 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 8302 transitions. Word has length 19 [2022-11-19 08:30:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:36,409 INFO L495 AbstractCegarLoop]: Abstraction has 2354 states and 8302 transitions. [2022-11-19 08:30:36,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 8302 transitions. [2022-11-19 08:30:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:30:36,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:36,410 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:36,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:36,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:36,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1939975584, now seen corresponding path program 1 times [2022-11-19 08:30:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:36,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323291] [2022-11-19 08:30:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:36,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:36,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:36,630 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:36,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:37,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:30:37,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:37,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:37,221 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:30:37,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:30:37,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 08:30:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:37,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:30:37,519 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:30:37,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:30:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:37,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:37,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323291] [2022-11-19 08:30:37,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:37,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:37,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:30:37,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47856788] [2022-11-19 08:30:37,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:37,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:30:37,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:30:37,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:37,742 INFO L87 Difference]: Start difference. First operand 2354 states and 8302 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:37,993 INFO L93 Difference]: Finished difference Result 2353 states and 8300 transitions. [2022-11-19 08:30:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:30:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-19 08:30:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:38,001 INFO L225 Difference]: With dead ends: 2353 [2022-11-19 08:30:38,001 INFO L226 Difference]: Without dead ends: 2353 [2022-11-19 08:30:38,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:38,002 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:38,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-11-19 08:30:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-11-19 08:30:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2353. [2022-11-19 08:30:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 1858 states have (on average 4.467168998923574) internal successors, (8300), 2352 states have internal predecessors, (8300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 8300 transitions. [2022-11-19 08:30:38,088 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 8300 transitions. Word has length 21 [2022-11-19 08:30:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:38,089 INFO L495 AbstractCegarLoop]: Abstraction has 2353 states and 8300 transitions. [2022-11-19 08:30:38,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 8300 transitions. [2022-11-19 08:30:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:30:38,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:38,091 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:38,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:38,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:38,306 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1939975586, now seen corresponding path program 1 times [2022-11-19 08:30:38,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:38,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786778793] [2022-11-19 08:30:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:38,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:38,308 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:38,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:38,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:30:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:38,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:38,875 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 08:30:38,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-19 08:30:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:39,262 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-19 08:30:39,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-19 08:30:39,637 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-19 08:30:39,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 08:30:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:39,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:39,923 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:39,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786778793] [2022-11-19 08:30:39,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786778793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:39,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:39,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:30:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134576822] [2022-11-19 08:30:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:39,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:39,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:39,927 INFO L87 Difference]: Start difference. First operand 2353 states and 8300 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:40,145 INFO L93 Difference]: Finished difference Result 2352 states and 8298 transitions. [2022-11-19 08:30:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:30:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-19 08:30:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:40,153 INFO L225 Difference]: With dead ends: 2352 [2022-11-19 08:30:40,153 INFO L226 Difference]: Without dead ends: 2352 [2022-11-19 08:30:40,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:40,154 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:40,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-11-19 08:30:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2022-11-19 08:30:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2352. [2022-11-19 08:30:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 1857 states have (on average 4.468497576736672) internal successors, (8298), 2351 states have internal predecessors, (8298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8298 transitions. [2022-11-19 08:30:40,217 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8298 transitions. Word has length 21 [2022-11-19 08:30:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:40,217 INFO L495 AbstractCegarLoop]: Abstraction has 2352 states and 8298 transitions. [2022-11-19 08:30:40,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8298 transitions. [2022-11-19 08:30:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:30:40,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:40,218 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:40,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:40,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:40,433 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash -9696643, now seen corresponding path program 1 times [2022-11-19 08:30:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:40,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617393349] [2022-11-19 08:30:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:40,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:40,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:40,435 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:40,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 08:30:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:30:40,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:40,905 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:30:40,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:30:40,963 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:30:40,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:30:40,996 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:30:40,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:30:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:41,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:41,025 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:41,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617393349] [2022-11-19 08:30:41,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617393349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:41,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:41,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:30:41,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311726610] [2022-11-19 08:30:41,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:41,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:41,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:41,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:41,027 INFO L87 Difference]: Start difference. First operand 2352 states and 8298 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:41,316 INFO L93 Difference]: Finished difference Result 1840 states and 6451 transitions. [2022-11-19 08:30:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:30:41,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:30:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:41,324 INFO L225 Difference]: With dead ends: 1840 [2022-11-19 08:30:41,325 INFO L226 Difference]: Without dead ends: 1840 [2022-11-19 08:30:41,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:41,326 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:41,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:30:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-11-19 08:30:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1840. [2022-11-19 08:30:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1510 states have (on average 4.272185430463576) internal successors, (6451), 1839 states have internal predecessors, (6451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6451 transitions. [2022-11-19 08:30:41,398 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6451 transitions. Word has length 22 [2022-11-19 08:30:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:41,400 INFO L495 AbstractCegarLoop]: Abstraction has 1840 states and 6451 transitions. [2022-11-19 08:30:41,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6451 transitions. [2022-11-19 08:30:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:30:41,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:41,401 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:41,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:41,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:41,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -9696642, now seen corresponding path program 1 times [2022-11-19 08:30:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:41,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219662999] [2022-11-19 08:30:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:41,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:41,610 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:41,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-19 08:30:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:30:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:42,220 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:30:42,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:30:42,343 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:30:42,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:30:42,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:42,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:30:42,458 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:30:42,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:30:42,511 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:30:42,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:30:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:42,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:42,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:42,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219662999] [2022-11-19 08:30:42,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219662999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:42,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:42,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:30:42,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043820783] [2022-11-19 08:30:42,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:42,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:30:42,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:42,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:30:42,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:42,578 INFO L87 Difference]: Start difference. First operand 1840 states and 6451 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:43,187 INFO L93 Difference]: Finished difference Result 3206 states and 11232 transitions. [2022-11-19 08:30:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:43,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:30:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:43,203 INFO L225 Difference]: With dead ends: 3206 [2022-11-19 08:30:43,203 INFO L226 Difference]: Without dead ends: 3206 [2022-11-19 08:30:43,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:30:43,204 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 145 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:43,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:30:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2022-11-19 08:30:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 2068. [2022-11-19 08:30:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 1738 states have (on average 4.5811277330264675) internal successors, (7962), 2067 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 7962 transitions. [2022-11-19 08:30:43,275 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 7962 transitions. Word has length 22 [2022-11-19 08:30:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:43,276 INFO L495 AbstractCegarLoop]: Abstraction has 2068 states and 7962 transitions. [2022-11-19 08:30:43,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:43,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 7962 transitions. [2022-11-19 08:30:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:30:43,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:43,277 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:43,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-19 08:30:43,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:43,492 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:43,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash -9696482, now seen corresponding path program 1 times [2022-11-19 08:30:43,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:43,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030055844] [2022-11-19 08:30:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:43,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:43,500 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:43,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:30:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:44,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:44,092 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-19 08:30:44,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-19 08:30:44,107 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 42 treesize of output 38 [2022-11-19 08:30:44,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:44,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:30:44,389 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:30:44,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:30:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:44,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:44,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:44,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030055844] [2022-11-19 08:30:44,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030055844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:44,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:44,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:30:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685255084] [2022-11-19 08:30:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:30:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:30:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:44,652 INFO L87 Difference]: Start difference. First operand 2068 states and 7962 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:45,002 INFO L93 Difference]: Finished difference Result 2067 states and 7957 transitions. [2022-11-19 08:30:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:45,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:30:45,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:45,009 INFO L225 Difference]: With dead ends: 2067 [2022-11-19 08:30:45,009 INFO L226 Difference]: Without dead ends: 2067 [2022-11-19 08:30:45,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:30:45,010 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:45,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-11-19 08:30:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-11-19 08:30:45,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2067. [2022-11-19 08:30:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1737 states have (on average 4.580886586067933) internal successors, (7957), 2066 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 7957 transitions. [2022-11-19 08:30:45,059 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 7957 transitions. Word has length 22 [2022-11-19 08:30:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:45,059 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 7957 transitions. [2022-11-19 08:30:45,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 7957 transitions. [2022-11-19 08:30:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:30:45,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:45,060 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:45,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:45,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:45,261 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash -9696570, now seen corresponding path program 1 times [2022-11-19 08:30:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649593718] [2022-11-19 08:30:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:45,262 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:45,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:45,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:30:45,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:45,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:30:45,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:30:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:45,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:30:45,787 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:30:45,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:30:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:45,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:45,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:45,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649593718] [2022-11-19 08:30:45,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649593718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:45,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:45,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:30:45,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326672233] [2022-11-19 08:30:45,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:45,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:30:45,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:45,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:30:45,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:45,849 INFO L87 Difference]: Start difference. First operand 2067 states and 7957 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:46,356 INFO L93 Difference]: Finished difference Result 2977 states and 10401 transitions. [2022-11-19 08:30:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:46,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:30:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:46,365 INFO L225 Difference]: With dead ends: 2977 [2022-11-19 08:30:46,365 INFO L226 Difference]: Without dead ends: 2977 [2022-11-19 08:30:46,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:30:46,366 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 158 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:46,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:30:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2022-11-19 08:30:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2067. [2022-11-19 08:30:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1737 states have (on average 4.450201496833621) internal successors, (7730), 2066 states have internal predecessors, (7730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 7730 transitions. [2022-11-19 08:30:46,407 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 7730 transitions. Word has length 22 [2022-11-19 08:30:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:46,407 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 7730 transitions. [2022-11-19 08:30:46,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 7730 transitions. [2022-11-19 08:30:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:30:46,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:46,408 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:46,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:46,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:46,611 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:46,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash -9696568, now seen corresponding path program 1 times [2022-11-19 08:30:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:46,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022579351] [2022-11-19 08:30:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:46,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:46,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:46,617 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:46,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 08:30:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:30:47,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:47,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:30:47,069 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:30:47,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:30:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:47,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:47,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:47,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022579351] [2022-11-19 08:30:47,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022579351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:47,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:47,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:30:47,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018623080] [2022-11-19 08:30:47,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:47,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:47,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:47,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:47,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:47,098 INFO L87 Difference]: Start difference. First operand 2067 states and 7730 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:47,384 INFO L93 Difference]: Finished difference Result 1611 states and 5821 transitions. [2022-11-19 08:30:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:30:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:30:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:47,389 INFO L225 Difference]: With dead ends: 1611 [2022-11-19 08:30:47,389 INFO L226 Difference]: Without dead ends: 1611 [2022-11-19 08:30:47,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:47,390 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:47,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:30:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-11-19 08:30:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2022-11-19 08:30:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1397 states have (on average 4.166785969935576) internal successors, (5821), 1610 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5821 transitions. [2022-11-19 08:30:47,418 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5821 transitions. Word has length 22 [2022-11-19 08:30:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:47,418 INFO L495 AbstractCegarLoop]: Abstraction has 1611 states and 5821 transitions. [2022-11-19 08:30:47,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5821 transitions. [2022-11-19 08:30:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:30:47,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:47,419 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:47,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:47,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:47,623 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash -9696484, now seen corresponding path program 1 times [2022-11-19 08:30:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:47,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915324312] [2022-11-19 08:30:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:47,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:47,626 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:47,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 08:30:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:48,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:30:48,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:48,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:48,142 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 08:30:48,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-19 08:30:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:48,513 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-19 08:30:48,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-19 08:30:48,852 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-19 08:30:48,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 08:30:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:49,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:49,124 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:49,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915324312] [2022-11-19 08:30:49,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915324312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:49,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:49,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:30:49,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769023478] [2022-11-19 08:30:49,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:49,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:49,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:49,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:49,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:49,127 INFO L87 Difference]: Start difference. First operand 1611 states and 5821 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:49,336 INFO L93 Difference]: Finished difference Result 1610 states and 5818 transitions. [2022-11-19 08:30:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:30:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:30:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:49,342 INFO L225 Difference]: With dead ends: 1610 [2022-11-19 08:30:49,342 INFO L226 Difference]: Without dead ends: 1610 [2022-11-19 08:30:49,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:49,343 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:49,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-19 08:30:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-11-19 08:30:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2022-11-19 08:30:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1396 states have (on average 4.167621776504298) internal successors, (5818), 1609 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5818 transitions. [2022-11-19 08:30:49,382 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5818 transitions. Word has length 22 [2022-11-19 08:30:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:49,382 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 5818 transitions. [2022-11-19 08:30:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5818 transitions. [2022-11-19 08:30:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:30:49,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:49,387 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:49,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:49,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:49,602 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash -300695923, now seen corresponding path program 1 times [2022-11-19 08:30:49,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:49,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881825533] [2022-11-19 08:30:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:49,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:49,604 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:49,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:50,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:30:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:50,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:50,118 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-19 08:30:50,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:30:50,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:50,464 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 08:30:50,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-19 08:30:52,043 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 08:30:52,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 08:30:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:53,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:53,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:53,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881825533] [2022-11-19 08:30:53,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881825533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:53,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:53,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:30:53,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275965346] [2022-11-19 08:30:53,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:53,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:53,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:53,127 INFO L87 Difference]: Start difference. First operand 1610 states and 5818 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) [2022-11-19 08:30:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:53,302 INFO L93 Difference]: Finished difference Result 1609 states and 5815 transitions. [2022-11-19 08:30:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:30:53,302 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 23 [2022-11-19 08:30:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:53,307 INFO L225 Difference]: With dead ends: 1609 [2022-11-19 08:30:53,307 INFO L226 Difference]: Without dead ends: 1609 [2022-11-19 08:30:53,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:53,308 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:53,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-19 08:30:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-19 08:30:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-19 08:30:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1395 states have (on average 4.168458781362007) internal successors, (5815), 1608 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5815 transitions. [2022-11-19 08:30:53,343 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5815 transitions. Word has length 23 [2022-11-19 08:30:53,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:53,344 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5815 transitions. [2022-11-19 08:30:53,345 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) [2022-11-19 08:30:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5815 transitions. [2022-11-19 08:30:53,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:30:53,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:53,345 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:53,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:53,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:53,559 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:53,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash -300695922, now seen corresponding path program 1 times [2022-11-19 08:30:53,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:53,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12170017] [2022-11-19 08:30:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:53,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:53,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:53,561 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:53,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-19 08:30:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:54,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:30:54,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:54,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:54,147 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:30:54,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:30:54,166 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 120 treesize of output 116 [2022-11-19 08:30:54,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:54,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:30:54,376 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:30:54,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:30:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:54,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:54,622 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:54,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12170017] [2022-11-19 08:30:54,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12170017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:54,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:54,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:30:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44694585] [2022-11-19 08:30:54,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:54,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:30:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:30:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:54,624 INFO L87 Difference]: Start difference. First operand 1609 states and 5815 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:54,934 INFO L93 Difference]: Finished difference Result 1608 states and 5812 transitions. [2022-11-19 08:30:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:30:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-19 08:30:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:54,938 INFO L225 Difference]: With dead ends: 1608 [2022-11-19 08:30:54,939 INFO L226 Difference]: Without dead ends: 1608 [2022-11-19 08:30:54,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:30:54,940 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:54,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-11-19 08:30:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-11-19 08:30:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1608. [2022-11-19 08:30:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1394 states have (on average 4.169296987087518) internal successors, (5812), 1607 states have internal predecessors, (5812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5812 transitions. [2022-11-19 08:30:55,001 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5812 transitions. Word has length 23 [2022-11-19 08:30:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:55,001 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 5812 transitions. [2022-11-19 08:30:55,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:55,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5812 transitions. [2022-11-19 08:30:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:30:55,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:55,003 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:55,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:55,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:55,218 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:55,219 INFO L85 PathProgramCache]: Analyzing trace with hash -300592230, now seen corresponding path program 1 times [2022-11-19 08:30:55,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:55,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63765044] [2022-11-19 08:30:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:55,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:55,221 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:30:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:55,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:55,806 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-19 08:30:55,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-11-19 08:30:55,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 08:30:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:55,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 08:30:56,138 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:30:56,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-19 08:30:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:56,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:56,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63765044] [2022-11-19 08:30:56,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63765044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:56,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:56,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:30:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782362443] [2022-11-19 08:30:56,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:56,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:30:56,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:56,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:30:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:30:56,692 INFO L87 Difference]: Start difference. First operand 1608 states and 5812 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-19 08:30:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:56,954 INFO L93 Difference]: Finished difference Result 1609 states and 5815 transitions. [2022-11-19 08:30:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:30:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 23 [2022-11-19 08:30:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:56,959 INFO L225 Difference]: With dead ends: 1609 [2022-11-19 08:30:56,959 INFO L226 Difference]: Without dead ends: 1609 [2022-11-19 08:30:56,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:30:56,960 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:56,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-11-19 08:30:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-19 08:30:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-19 08:30:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1395 states have (on average 4.168458781362007) internal successors, (5815), 1608 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5815 transitions. [2022-11-19 08:30:57,000 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5815 transitions. Word has length 23 [2022-11-19 08:30:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:57,000 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5815 transitions. [2022-11-19 08:30:57,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-11-19 08:30:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5815 transitions. [2022-11-19 08:30:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:30:57,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:57,001 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:57,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:30:57,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:57,216 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash -300592232, now seen corresponding path program 1 times [2022-11-19 08:30:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268461899] [2022-11-19 08:30:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:57,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:57,218 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:57,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-19 08:30:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:30:57,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:57,806 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:30:57,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-19 08:30:57,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:57,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-19 08:30:58,013 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:30:58,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:30:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:58,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:58,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:58,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268461899] [2022-11-19 08:30:58,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268461899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:58,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:58,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:30:58,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965084231] [2022-11-19 08:30:58,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:58,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:30:58,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:58,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:30:58,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:30:58,236 INFO L87 Difference]: Start difference. First operand 1609 states and 5815 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:58,501 INFO L93 Difference]: Finished difference Result 1609 states and 5814 transitions. [2022-11-19 08:30:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:30:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-19 08:30:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:58,506 INFO L225 Difference]: With dead ends: 1609 [2022-11-19 08:30:58,506 INFO L226 Difference]: Without dead ends: 1609 [2022-11-19 08:30:58,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:30:58,507 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:58,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-11-19 08:30:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-19 08:30:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-19 08:30:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1395 states have (on average 4.167741935483871) internal successors, (5814), 1608 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5814 transitions. [2022-11-19 08:30:58,535 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5814 transitions. Word has length 23 [2022-11-19 08:30:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:58,535 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5814 transitions. [2022-11-19 08:30:58,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5814 transitions. [2022-11-19 08:30:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:30:58,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:58,536 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:58,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:58,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:58,739 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:30:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash -300590184, now seen corresponding path program 1 times [2022-11-19 08:30:58,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:30:58,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509496054] [2022-11-19 08:30:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:58,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:30:58,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:30:58,740 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:30:58,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 08:30:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:59,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:30:59,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:59,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:59,295 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:30:59,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:30:59,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 08:30:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:30:59,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:30:59,530 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:30:59,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:30:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:30:59,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:59,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:30:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509496054] [2022-11-19 08:30:59,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509496054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:59,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:59,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:30:59,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575679672] [2022-11-19 08:30:59,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:59,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:30:59,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:30:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:30:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:59,755 INFO L87 Difference]: Start difference. First operand 1609 states and 5814 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:59,990 INFO L93 Difference]: Finished difference Result 1610 states and 5816 transitions. [2022-11-19 08:30:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:30:59,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-19 08:30:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:59,995 INFO L225 Difference]: With dead ends: 1610 [2022-11-19 08:30:59,995 INFO L226 Difference]: Without dead ends: 1610 [2022-11-19 08:30:59,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:59,996 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:59,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-19 08:30:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-11-19 08:31:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2022-11-19 08:31:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1396 states have (on average 4.166189111747851) internal successors, (5816), 1609 states have internal predecessors, (5816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5816 transitions. [2022-11-19 08:31:00,036 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5816 transitions. Word has length 23 [2022-11-19 08:31:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:00,036 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 5816 transitions. [2022-11-19 08:31:00,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5816 transitions. [2022-11-19 08:31:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:31:00,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:00,037 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:00,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:00,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:00,252 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:00,253 INFO L85 PathProgramCache]: Analyzing trace with hash -300590186, now seen corresponding path program 1 times [2022-11-19 08:31:00,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:00,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532136285] [2022-11-19 08:31:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:00,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:00,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:00,255 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:00,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:00,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:31:00,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:00,826 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 08:31:00,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-19 08:31:01,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:01,153 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-19 08:31:01,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-19 08:31:01,439 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-19 08:31:01,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 08:31:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:01,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:01,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:01,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532136285] [2022-11-19 08:31:01,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532136285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:01,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:01,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:31:01,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956072769] [2022-11-19 08:31:01,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:01,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:31:01,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:31:01,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:31:01,750 INFO L87 Difference]: Start difference. First operand 1610 states and 5816 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) [2022-11-19 08:31:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:01,942 INFO L93 Difference]: Finished difference Result 1610 states and 5815 transitions. [2022-11-19 08:31:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:31:01,943 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 23 [2022-11-19 08:31:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:01,947 INFO L225 Difference]: With dead ends: 1610 [2022-11-19 08:31:01,947 INFO L226 Difference]: Without dead ends: 1610 [2022-11-19 08:31:01,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:31:01,948 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:01,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-19 08:31:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-11-19 08:31:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2022-11-19 08:31:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1396 states have (on average 4.165472779369628) internal successors, (5815), 1609 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5815 transitions. [2022-11-19 08:31:01,992 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5815 transitions. Word has length 23 [2022-11-19 08:31:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:01,992 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 5815 transitions. [2022-11-19 08:31:01,992 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) [2022-11-19 08:31:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5815 transitions. [2022-11-19 08:31:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:01,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:01,993 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:02,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:02,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:02,209 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -731233773, now seen corresponding path program 1 times [2022-11-19 08:31:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69992148] [2022-11-19 08:31:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:02,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:02,211 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:02,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-19 08:31:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:02,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:31:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:02,778 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-19 08:31:02,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:31:03,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:03,069 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 08:31:03,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-19 08:31:09,698 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 08:31:09,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 08:31:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:12,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:12,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69992148] [2022-11-19 08:31:12,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69992148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:12,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:12,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533061713] [2022-11-19 08:31:12,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-19 08:31:12,159 INFO L87 Difference]: Start difference. First operand 1610 states and 5815 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:12,324 INFO L93 Difference]: Finished difference Result 1609 states and 5811 transitions. [2022-11-19 08:31:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:31:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:12,329 INFO L225 Difference]: With dead ends: 1609 [2022-11-19 08:31:12,329 INFO L226 Difference]: Without dead ends: 1609 [2022-11-19 08:31:12,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-19 08:31:12,330 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:12,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-19 08:31:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-19 08:31:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-19 08:31:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1395 states have (on average 4.165591397849463) internal successors, (5811), 1608 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5811 transitions. [2022-11-19 08:31:12,356 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5811 transitions. Word has length 24 [2022-11-19 08:31:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:12,357 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 5811 transitions. [2022-11-19 08:31:12,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5811 transitions. [2022-11-19 08:31:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:12,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:12,357 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:12,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:12,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:12,559 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -731233772, now seen corresponding path program 1 times [2022-11-19 08:31:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:12,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449675727] [2022-11-19 08:31:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:12,560 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:12,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:13,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:31:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:13,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:13,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:13,139 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:31:13,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:31:13,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:31:13,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:13,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:13,333 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:31:13,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:31:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:13,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:13,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:13,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449675727] [2022-11-19 08:31:13,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449675727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:13,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:13,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:13,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109612096] [2022-11-19 08:31:13,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:13,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:13,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:13,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:13,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:13,601 INFO L87 Difference]: Start difference. First operand 1609 states and 5811 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:13,872 INFO L93 Difference]: Finished difference Result 1608 states and 5807 transitions. [2022-11-19 08:31:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:31:13,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:13,876 INFO L225 Difference]: With dead ends: 1608 [2022-11-19 08:31:13,877 INFO L226 Difference]: Without dead ends: 1608 [2022-11-19 08:31:13,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:31:13,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:13,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-11-19 08:31:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-11-19 08:31:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1608. [2022-11-19 08:31:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1394 states have (on average 4.16571018651363) internal successors, (5807), 1607 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5807 transitions. [2022-11-19 08:31:13,917 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5807 transitions. Word has length 24 [2022-11-19 08:31:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:13,917 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 5807 transitions. [2022-11-19 08:31:13,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5807 transitions. [2022-11-19 08:31:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:13,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:13,918 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:13,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-19 08:31:14,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:14,134 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:14,134 INFO L85 PathProgramCache]: Analyzing trace with hash -731634793, now seen corresponding path program 1 times [2022-11-19 08:31:14,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:14,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833699361] [2022-11-19 08:31:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:14,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:14,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:14,136 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:14,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-19 08:31:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:31:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:14,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:31:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:14,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:14,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:14,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833699361] [2022-11-19 08:31:14,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833699361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:14,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:14,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:31:14,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607477009] [2022-11-19 08:31:14,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:14,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:14,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:14,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:14,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:14,665 INFO L87 Difference]: Start difference. First operand 1608 states and 5807 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2022-11-19 08:31:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:15,243 INFO L93 Difference]: Finished difference Result 2734 states and 9927 transitions. [2022-11-19 08:31:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:31:15,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 24 [2022-11-19 08:31:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:15,254 INFO L225 Difference]: With dead ends: 2734 [2022-11-19 08:31:15,254 INFO L226 Difference]: Without dead ends: 2734 [2022-11-19 08:31:15,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:31:15,255 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:15,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:31:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2022-11-19 08:31:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 1828. [2022-11-19 08:31:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1614 states have (on average 4.511152416356877) internal successors, (7281), 1827 states have internal predecessors, (7281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 7281 transitions. [2022-11-19 08:31:15,310 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 7281 transitions. Word has length 24 [2022-11-19 08:31:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:15,311 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 7281 transitions. [2022-11-19 08:31:15,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2022-11-19 08:31:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 7281 transitions. [2022-11-19 08:31:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:15,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:15,312 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:15,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:15,527 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -731634792, now seen corresponding path program 1 times [2022-11-19 08:31:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:15,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913381730] [2022-11-19 08:31:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:15,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:15,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:15,529 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:15,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:31:15,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:15,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:31:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:15,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:15,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:15,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913381730] [2022-11-19 08:31:15,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913381730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:15,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:15,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:15,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893165695] [2022-11-19 08:31:15,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:15,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:31:15,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:15,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:31:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:31:15,936 INFO L87 Difference]: Start difference. First operand 1828 states and 7281 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:16,200 INFO L93 Difference]: Finished difference Result 1380 states and 5328 transitions. [2022-11-19 08:31:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:31:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:16,206 INFO L225 Difference]: With dead ends: 1380 [2022-11-19 08:31:16,206 INFO L226 Difference]: Without dead ends: 1380 [2022-11-19 08:31:16,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:16,207 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:16,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:31:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-11-19 08:31:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1380. [2022-11-19 08:31:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1251 states have (on average 4.258992805755396) internal successors, (5328), 1379 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5328 transitions. [2022-11-19 08:31:16,241 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5328 transitions. Word has length 24 [2022-11-19 08:31:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:16,241 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 5328 transitions. [2022-11-19 08:31:16,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5328 transitions. [2022-11-19 08:31:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:16,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:16,242 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:16,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:16,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:16,443 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash -731634727, now seen corresponding path program 1 times [2022-11-19 08:31:16,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:16,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445890645] [2022-11-19 08:31:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:16,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:16,445 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:16,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-19 08:31:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:31:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:17,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:17,059 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-19 08:31:17,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:31:17,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:17,356 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 08:31:17,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-19 08:31:20,881 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 08:31:20,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 08:31:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:23,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:23,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445890645] [2022-11-19 08:31:23,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445890645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:23,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:23,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864211959] [2022-11-19 08:31:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-19 08:31:23,366 INFO L87 Difference]: Start difference. First operand 1380 states and 5328 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:23,548 INFO L93 Difference]: Finished difference Result 1379 states and 5323 transitions. [2022-11-19 08:31:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:31:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:23,552 INFO L225 Difference]: With dead ends: 1379 [2022-11-19 08:31:23,552 INFO L226 Difference]: Without dead ends: 1379 [2022-11-19 08:31:23,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-19 08:31:23,553 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:23,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-11-19 08:31:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-19 08:31:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1379. [2022-11-19 08:31:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1250 states have (on average 4.2584) internal successors, (5323), 1378 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 5323 transitions. [2022-11-19 08:31:23,583 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 5323 transitions. Word has length 24 [2022-11-19 08:31:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:23,583 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 5323 transitions. [2022-11-19 08:31:23,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 5323 transitions. [2022-11-19 08:31:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:23,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:23,583 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:23,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:23,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:23,784 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash -731634726, now seen corresponding path program 1 times [2022-11-19 08:31:23,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:23,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816969434] [2022-11-19 08:31:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:23,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:23,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:23,787 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:23,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 08:31:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:31:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:24,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:24,393 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:31:24,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:31:24,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:31:24,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:24,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:24,592 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:31:24,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:31:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:24,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:24,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:24,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816969434] [2022-11-19 08:31:24,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816969434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:24,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:24,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169924208] [2022-11-19 08:31:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:24,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:24,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:24,868 INFO L87 Difference]: Start difference. First operand 1379 states and 5323 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:25,136 INFO L93 Difference]: Finished difference Result 1378 states and 5318 transitions. [2022-11-19 08:31:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:31:25,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:25,140 INFO L225 Difference]: With dead ends: 1378 [2022-11-19 08:31:25,140 INFO L226 Difference]: Without dead ends: 1378 [2022-11-19 08:31:25,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:31:25,141 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:25,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-11-19 08:31:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-11-19 08:31:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1378. [2022-11-19 08:31:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1249 states have (on average 4.257806244995996) internal successors, (5318), 1377 states have internal predecessors, (5318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5318 transitions. [2022-11-19 08:31:25,176 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5318 transitions. Word has length 24 [2022-11-19 08:31:25,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:25,176 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 5318 transitions. [2022-11-19 08:31:25,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5318 transitions. [2022-11-19 08:31:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:25,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:25,177 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:25,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:25,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:25,392 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -731634868, now seen corresponding path program 1 times [2022-11-19 08:31:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256493033] [2022-11-19 08:31:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:25,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:25,395 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:25,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:31:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:26,044 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:31:26,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:31:26,174 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:31:26,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:31:26,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:26,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:26,262 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:31:26,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:31:26,309 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:31:26,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:26,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:26,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:26,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256493033] [2022-11-19 08:31:26,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256493033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:26,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:26,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:26,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008410236] [2022-11-19 08:31:26,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:26,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:26,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:26,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:26,381 INFO L87 Difference]: Start difference. First operand 1378 states and 5318 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:26,895 INFO L93 Difference]: Finished difference Result 1776 states and 6372 transitions. [2022-11-19 08:31:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:31:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:26,900 INFO L225 Difference]: With dead ends: 1776 [2022-11-19 08:31:26,900 INFO L226 Difference]: Without dead ends: 1776 [2022-11-19 08:31:26,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:31:26,903 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 120 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:26,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:31:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-11-19 08:31:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1378. [2022-11-19 08:31:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1249 states have (on average 4.108887109687751) internal successors, (5132), 1377 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5132 transitions. [2022-11-19 08:31:26,929 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5132 transitions. Word has length 24 [2022-11-19 08:31:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:26,929 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 5132 transitions. [2022-11-19 08:31:26,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:26,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5132 transitions. [2022-11-19 08:31:26,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:26,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:26,930 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:26,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:27,130 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -728419197, now seen corresponding path program 1 times [2022-11-19 08:31:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:27,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097520159] [2022-11-19 08:31:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:27,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:27,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:27,133 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:27,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:27,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:31:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:27,789 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:31:27,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:31:27,913 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:31:27,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:31:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:27,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:28,010 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:31:28,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:31:28,060 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:31:28,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:28,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:31,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097520159] [2022-11-19 08:31:31,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097520159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:31,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743704927] [2022-11-19 08:31:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:31,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:31:31,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:31:31,113 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:31:31,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-19 08:31:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:31:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:32,806 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:31:32,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:31:32,924 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:31:32,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:31:32,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:32,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:33,006 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:31:33,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:31:33,048 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:31:33,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:33,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:33,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743704927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:33,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894921802] [2022-11-19 08:31:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:33,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:33,626 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:33,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 08:31:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:31:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:34,139 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:31:34,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:31:34,263 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:31:34,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:31:34,360 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:31:34,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:31:34,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:34,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:34,509 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 08:31:34,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 08:31:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:34,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:38,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894921802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:38,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:31:38,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5, 5, 5] total 12 [2022-11-19 08:31:38,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770723797] [2022-11-19 08:31:38,943 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:31:38,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:31:38,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:38,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:31:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2022-11-19 08:31:38,945 INFO L87 Difference]: Start difference. First operand 1378 states and 5132 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:40,560 INFO L93 Difference]: Finished difference Result 4084 states and 14743 transitions. [2022-11-19 08:31:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:31:40,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:40,578 INFO L225 Difference]: With dead ends: 4084 [2022-11-19 08:31:40,578 INFO L226 Difference]: Without dead ends: 4084 [2022-11-19 08:31:40,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=87, Invalid=218, Unknown=1, NotChecked=0, Total=306 [2022-11-19 08:31:40,579 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 344 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:40,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 0 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 310 Invalid, 0 Unknown, 115 Unchecked, 1.3s Time] [2022-11-19 08:31:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2022-11-19 08:31:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 2407. [2022-11-19 08:31:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2278 states have (on average 4.391571553994733) internal successors, (10004), 2406 states have internal predecessors, (10004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 10004 transitions. [2022-11-19 08:31:40,659 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 10004 transitions. Word has length 24 [2022-11-19 08:31:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:40,660 INFO L495 AbstractCegarLoop]: Abstraction has 2407 states and 10004 transitions. [2022-11-19 08:31:40,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 10004 transitions. [2022-11-19 08:31:40,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:40,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:40,661 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:40,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:40,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:41,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:41,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:31:41,273 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -728419037, now seen corresponding path program 1 times [2022-11-19 08:31:41,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:41,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231441924] [2022-11-19 08:31:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:41,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:41,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:41,275 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:41,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-19 08:31:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:31:41,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:41,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,912 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-19 08:31:41,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-11-19 08:31:41,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 08:31:42,078 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:31:42,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:31:42,260 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:31:42,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 38 [2022-11-19 08:31:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:42,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:42,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:42,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231441924] [2022-11-19 08:31:42,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231441924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:42,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:42,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:42,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920816413] [2022-11-19 08:31:42,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:42,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:42,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:42,496 INFO L87 Difference]: Start difference. First operand 2407 states and 10004 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:42,840 INFO L93 Difference]: Finished difference Result 2362 states and 9868 transitions. [2022-11-19 08:31:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:31:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:42,847 INFO L225 Difference]: With dead ends: 2362 [2022-11-19 08:31:42,848 INFO L226 Difference]: Without dead ends: 2362 [2022-11-19 08:31:42,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:42,848 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:42,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-11-19 08:31:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-11-19 08:31:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2022-11-19 08:31:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2245 states have (on average 4.395545657015591) internal successors, (9868), 2361 states have internal predecessors, (9868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 9868 transitions. [2022-11-19 08:31:42,908 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 9868 transitions. Word has length 24 [2022-11-19 08:31:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:42,908 INFO L495 AbstractCegarLoop]: Abstraction has 2362 states and 9868 transitions. [2022-11-19 08:31:42,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 9868 transitions. [2022-11-19 08:31:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:42,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:42,909 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:42,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-19 08:31:43,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:43,125 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash -728419125, now seen corresponding path program 1 times [2022-11-19 08:31:43,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:43,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413030656] [2022-11-19 08:31:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:43,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:43,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:43,127 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:43,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:43,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:31:43,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:43,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:31:43,731 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:31:43,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:43,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:44,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413030656] [2022-11-19 08:31:44,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413030656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [455003132] [2022-11-19 08:31:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:44,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:31:44,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:31:44,309 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:31:44,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-19 08:31:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:31:45,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:45,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:31:45,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:31:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:46,078 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:31:46,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:31:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:46,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:48,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [455003132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:48,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803112060] [2022-11-19 08:31:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:48,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:48,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:48,631 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:48,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-19 08:31:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:31:49,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:49,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:31:49,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:49,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:49,140 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:31:49,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:31:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:31:49,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:49,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:31:49,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 65 [2022-11-19 08:31:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 5 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:31:51,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803112060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:51,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:31:51,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 12 [2022-11-19 08:31:51,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351222641] [2022-11-19 08:31:51,864 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:31:51,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:31:51,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:51,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:31:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=116, Unknown=1, NotChecked=0, Total=156 [2022-11-19 08:31:51,865 INFO L87 Difference]: Start difference. First operand 2362 states and 9868 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:53,346 INFO L93 Difference]: Finished difference Result 3723 states and 13352 transitions. [2022-11-19 08:31:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:31:53,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:31:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:53,357 INFO L225 Difference]: With dead ends: 3723 [2022-11-19 08:31:53,357 INFO L226 Difference]: Without dead ends: 3723 [2022-11-19 08:31:53,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2022-11-19 08:31:53,358 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 438 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:53,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 0 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 315 Invalid, 0 Unknown, 82 Unchecked, 1.2s Time] [2022-11-19 08:31:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-11-19 08:31:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 2362. [2022-11-19 08:31:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2245 states have (on average 4.167037861915367) internal successors, (9355), 2361 states have internal predecessors, (9355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 9355 transitions. [2022-11-19 08:31:53,425 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 9355 transitions. Word has length 24 [2022-11-19 08:31:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:53,425 INFO L495 AbstractCegarLoop]: Abstraction has 2362 states and 9355 transitions. [2022-11-19 08:31:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 9355 transitions. [2022-11-19 08:31:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:31:53,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:53,426 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:53,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:53,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:53,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:54,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:31:54,041 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:54,041 INFO L85 PathProgramCache]: Analyzing trace with hash -728419039, now seen corresponding path program 1 times [2022-11-19 08:31:54,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:54,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725765717] [2022-11-19 08:31:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:54,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:54,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:54,043 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:54,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:54,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:31:54,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:54,671 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:31:54,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-19 08:31:54,737 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:31:54,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:31:54,819 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:31:54,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-19 08:31:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:55,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:55,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:55,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725765717] [2022-11-19 08:31:55,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725765717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:55,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:55,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:31:55,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946446043] [2022-11-19 08:31:55,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:55,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:31:55,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:31:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:31:55,064 INFO L87 Difference]: Start difference. First operand 2362 states and 9355 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-19 08:31:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:55,559 INFO L93 Difference]: Finished difference Result 2386 states and 9402 transitions. [2022-11-19 08:31:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:31:55,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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 24 [2022-11-19 08:31:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:55,568 INFO L225 Difference]: With dead ends: 2386 [2022-11-19 08:31:55,569 INFO L226 Difference]: Without dead ends: 2386 [2022-11-19 08:31:55,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:31:55,570 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:55,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-11-19 08:31:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2022-11-19 08:31:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2361. [2022-11-19 08:31:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2244 states have (on average 4.1653297682709445) internal successors, (9347), 2360 states have internal predecessors, (9347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 9347 transitions. [2022-11-19 08:31:55,623 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 9347 transitions. Word has length 24 [2022-11-19 08:31:55,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:55,623 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 9347 transitions. [2022-11-19 08:31:55,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-19 08:31:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 9347 transitions. [2022-11-19 08:31:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:31:55,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:55,624 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:55,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:55,839 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1193406189, now seen corresponding path program 1 times [2022-11-19 08:31:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:55,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612314185] [2022-11-19 08:31:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:55,841 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:55,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:56,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:31:56,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:56,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:56,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:56,441 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-19 08:31:56,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:31:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:56,761 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 08:31:56,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-19 08:31:57,423 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 08:31:57,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 08:31:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:58,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:58,047 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:58,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612314185] [2022-11-19 08:31:58,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612314185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:58,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:58,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:31:58,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512456374] [2022-11-19 08:31:58,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:58,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:31:58,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:58,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:31:58,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:31:58,048 INFO L87 Difference]: Start difference. First operand 2361 states and 9347 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:58,212 INFO L93 Difference]: Finished difference Result 2360 states and 9342 transitions. [2022-11-19 08:31:58,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:31:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:31:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:58,218 INFO L225 Difference]: With dead ends: 2360 [2022-11-19 08:31:58,219 INFO L226 Difference]: Without dead ends: 2360 [2022-11-19 08:31:58,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:31:58,219 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:58,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-19 08:31:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2022-11-19 08:31:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2360. [2022-11-19 08:31:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2243 states have (on average 4.164957646009809) internal successors, (9342), 2359 states have internal predecessors, (9342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 9342 transitions. [2022-11-19 08:31:58,257 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 9342 transitions. Word has length 25 [2022-11-19 08:31:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:58,257 INFO L495 AbstractCegarLoop]: Abstraction has 2360 states and 9342 transitions. [2022-11-19 08:31:58,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 9342 transitions. [2022-11-19 08:31:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:31:58,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:58,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:58,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-19 08:31:58,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:58,458 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:31:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1193406188, now seen corresponding path program 1 times [2022-11-19 08:31:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:31:58,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059033808] [2022-11-19 08:31:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:58,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:31:58,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:31:58,460 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:31:58,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:31:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:31:59,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:59,166 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:31:59,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:31:59,188 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 60 treesize of output 58 [2022-11-19 08:31:59,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:59,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:31:59,488 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:31:59,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:31:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:31:59,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:59,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:31:59,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059033808] [2022-11-19 08:31:59,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059033808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:59,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:59,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:59,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303187658] [2022-11-19 08:31:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:59,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:31:59,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:31:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:31:59,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:59,769 INFO L87 Difference]: Start difference. First operand 2360 states and 9342 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:00,019 INFO L93 Difference]: Finished difference Result 2359 states and 9337 transitions. [2022-11-19 08:32:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:00,026 INFO L225 Difference]: With dead ends: 2359 [2022-11-19 08:32:00,026 INFO L226 Difference]: Without dead ends: 2359 [2022-11-19 08:32:00,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:00,027 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:00,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-11-19 08:32:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-11-19 08:32:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2359. [2022-11-19 08:32:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2242 states have (on average 4.164585191793042) internal successors, (9337), 2358 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 9337 transitions. [2022-11-19 08:32:00,066 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 9337 transitions. Word has length 25 [2022-11-19 08:32:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:00,066 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 9337 transitions. [2022-11-19 08:32:00,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 9337 transitions. [2022-11-19 08:32:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:00,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:00,067 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:00,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:00,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:00,268 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1193411831, now seen corresponding path program 1 times [2022-11-19 08:32:00,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:00,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85795402] [2022-11-19 08:32:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:00,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:00,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:00,270 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:00,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:00,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:32:00,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:00,908 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-19 08:32:00,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-19 08:32:01,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:01,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:01,097 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:32:01,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:01,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:01,248 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85795402] [2022-11-19 08:32:01,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85795402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:01,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:01,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:01,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261157094] [2022-11-19 08:32:01,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:01,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:01,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:01,250 INFO L87 Difference]: Start difference. First operand 2359 states and 9337 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:01,485 INFO L93 Difference]: Finished difference Result 2361 states and 9343 transitions. [2022-11-19 08:32:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:01,492 INFO L225 Difference]: With dead ends: 2361 [2022-11-19 08:32:01,492 INFO L226 Difference]: Without dead ends: 2361 [2022-11-19 08:32:01,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:01,493 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:01,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-11-19 08:32:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-11-19 08:32:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2360. [2022-11-19 08:32:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2243 states have (on average 4.164511814534106) internal successors, (9341), 2359 states have internal predecessors, (9341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 9341 transitions. [2022-11-19 08:32:01,551 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 9341 transitions. Word has length 25 [2022-11-19 08:32:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:01,551 INFO L495 AbstractCegarLoop]: Abstraction has 2360 states and 9341 transitions. [2022-11-19 08:32:01,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 9341 transitions. [2022-11-19 08:32:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:01,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:01,552 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:01,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:01,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:01,752 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1193411830, now seen corresponding path program 1 times [2022-11-19 08:32:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:01,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320661912] [2022-11-19 08:32:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:01,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:01,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:01,754 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:01,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-19 08:32:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:02,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:32:02,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:02,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:02,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:02,437 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:32:02,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:32:02,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:32:02,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:02,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:32:02,632 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:32:02,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:32:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:02,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:02,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320661912] [2022-11-19 08:32:02,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320661912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:02,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:02,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:02,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298752842] [2022-11-19 08:32:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:02,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:02,898 INFO L87 Difference]: Start difference. First operand 2360 states and 9341 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:03,146 INFO L93 Difference]: Finished difference Result 2359 states and 9337 transitions. [2022-11-19 08:32:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:03,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:03,153 INFO L225 Difference]: With dead ends: 2359 [2022-11-19 08:32:03,153 INFO L226 Difference]: Without dead ends: 2359 [2022-11-19 08:32:03,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:03,154 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:03,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-11-19 08:32:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-11-19 08:32:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2359. [2022-11-19 08:32:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2242 states have (on average 4.164585191793042) internal successors, (9337), 2358 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 9337 transitions. [2022-11-19 08:32:03,202 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 9337 transitions. Word has length 25 [2022-11-19 08:32:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:03,202 INFO L495 AbstractCegarLoop]: Abstraction has 2359 states and 9337 transitions. [2022-11-19 08:32:03,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 9337 transitions. [2022-11-19 08:32:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:03,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:03,204 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:03,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:03,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:03,419 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1193409785, now seen corresponding path program 1 times [2022-11-19 08:32:03,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:03,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959618992] [2022-11-19 08:32:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:03,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:03,421 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:03,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 08:32:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:32:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:04,122 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-19 08:32:04,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:32:04,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:04,418 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 08:32:04,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-19 08:32:05,078 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 08:32:05,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 08:32:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:05,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:05,763 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:05,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959618992] [2022-11-19 08:32:05,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959618992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:05,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:05,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:05,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935427298] [2022-11-19 08:32:05,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:05,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:32:05,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:05,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:32:05,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:05,765 INFO L87 Difference]: Start difference. First operand 2359 states and 9337 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:05,926 INFO L93 Difference]: Finished difference Result 2361 states and 9341 transitions. [2022-11-19 08:32:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:05,933 INFO L225 Difference]: With dead ends: 2361 [2022-11-19 08:32:05,934 INFO L226 Difference]: Without dead ends: 2361 [2022-11-19 08:32:05,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:05,934 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:05,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-11-19 08:32:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-11-19 08:32:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2022-11-19 08:32:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2244 states have (on average 4.162655971479501) internal successors, (9341), 2360 states have internal predecessors, (9341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 9341 transitions. [2022-11-19 08:32:05,993 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 9341 transitions. Word has length 25 [2022-11-19 08:32:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:05,994 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 9341 transitions. [2022-11-19 08:32:05,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 9341 transitions. [2022-11-19 08:32:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:05,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:05,995 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:06,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:06,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:06,199 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:06,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1193409784, now seen corresponding path program 1 times [2022-11-19 08:32:06,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:06,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343097244] [2022-11-19 08:32:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:06,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:06,201 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:06,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:32:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:06,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,872 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:32:06,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:32:06,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:32:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:32:07,082 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:32:07,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:32:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:07,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:07,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:07,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343097244] [2022-11-19 08:32:07,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343097244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:07,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:07,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185858195] [2022-11-19 08:32:07,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:07,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:07,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:07,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:07,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:07,366 INFO L87 Difference]: Start difference. First operand 2361 states and 9341 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:07,644 INFO L93 Difference]: Finished difference Result 2361 states and 9340 transitions. [2022-11-19 08:32:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:07,651 INFO L225 Difference]: With dead ends: 2361 [2022-11-19 08:32:07,651 INFO L226 Difference]: Without dead ends: 2361 [2022-11-19 08:32:07,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:07,652 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:07,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-11-19 08:32:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-11-19 08:32:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2022-11-19 08:32:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2244 states have (on average 4.162210338680927) internal successors, (9340), 2360 states have internal predecessors, (9340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 9340 transitions. [2022-11-19 08:32:07,691 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 9340 transitions. Word has length 25 [2022-11-19 08:32:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:07,691 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 9340 transitions. [2022-11-19 08:32:07,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 9340 transitions. [2022-11-19 08:32:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:07,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:07,692 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:07,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:07,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:07,893 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:07,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1193183981, now seen corresponding path program 2 times [2022-11-19 08:32:07,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:07,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621116170] [2022-11-19 08:32:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:32:07,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:07,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:07,894 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:07,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-19 08:32:08,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:32:08,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:08,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:32:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:08,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:08,327 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-19 08:32:08,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-19 08:32:08,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:08,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:08,505 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:32:08,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:08,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:08,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:08,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621116170] [2022-11-19 08:32:08,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621116170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:08,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:08,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:08,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898063101] [2022-11-19 08:32:08,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:08,664 INFO L87 Difference]: Start difference. First operand 2361 states and 9340 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:08,936 INFO L93 Difference]: Finished difference Result 2363 states and 9345 transitions. [2022-11-19 08:32:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:08,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:08,943 INFO L225 Difference]: With dead ends: 2363 [2022-11-19 08:32:08,943 INFO L226 Difference]: Without dead ends: 2363 [2022-11-19 08:32:08,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:08,944 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:08,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-11-19 08:32:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2022-11-19 08:32:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2362. [2022-11-19 08:32:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2245 states have (on average 4.161247216035635) internal successors, (9342), 2361 states have internal predecessors, (9342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 9342 transitions. [2022-11-19 08:32:08,982 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 9342 transitions. Word has length 25 [2022-11-19 08:32:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:08,982 INFO L495 AbstractCegarLoop]: Abstraction has 2362 states and 9342 transitions. [2022-11-19 08:32:08,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 9342 transitions. [2022-11-19 08:32:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:08,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:08,983 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:09,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-19 08:32:09,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:09,183 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1205840723, now seen corresponding path program 1 times [2022-11-19 08:32:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:09,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684492777] [2022-11-19 08:32:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:09,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:09,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:09,185 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:09,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-19 08:32:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:32:09,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:09,845 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-19 08:32:09,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-19 08:32:09,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:09,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:10,040 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:32:10,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:10,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:10,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684492777] [2022-11-19 08:32:10,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684492777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:10,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:10,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516739678] [2022-11-19 08:32:10,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:10,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:10,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:10,193 INFO L87 Difference]: Start difference. First operand 2362 states and 9342 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:10,449 INFO L93 Difference]: Finished difference Result 2363 states and 9346 transitions. [2022-11-19 08:32:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:10,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:10,457 INFO L225 Difference]: With dead ends: 2363 [2022-11-19 08:32:10,457 INFO L226 Difference]: Without dead ends: 2363 [2022-11-19 08:32:10,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:10,457 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:10,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-11-19 08:32:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2022-11-19 08:32:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2363. [2022-11-19 08:32:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2246 states have (on average 4.161175422974177) internal successors, (9346), 2362 states have internal predecessors, (9346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 9346 transitions. [2022-11-19 08:32:10,520 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 9346 transitions. Word has length 25 [2022-11-19 08:32:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:10,520 INFO L495 AbstractCegarLoop]: Abstraction has 2363 states and 9346 transitions. [2022-11-19 08:32:10,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 9346 transitions. [2022-11-19 08:32:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:10,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:10,521 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:10,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:10,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:10,721 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1205840722, now seen corresponding path program 1 times [2022-11-19 08:32:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:10,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465023677] [2022-11-19 08:32:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:10,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:10,723 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:10,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:11,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:32:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:11,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:11,444 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:32:11,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:32:11,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:32:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:11,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:32:11,640 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:32:11,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:32:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:11,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:11,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465023677] [2022-11-19 08:32:11,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465023677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:11,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:11,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:11,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622300670] [2022-11-19 08:32:11,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:11,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:11,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:11,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:11,922 INFO L87 Difference]: Start difference. First operand 2363 states and 9346 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:12,171 INFO L93 Difference]: Finished difference Result 2363 states and 9345 transitions. [2022-11-19 08:32:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:12,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:12,178 INFO L225 Difference]: With dead ends: 2363 [2022-11-19 08:32:12,178 INFO L226 Difference]: Without dead ends: 2363 [2022-11-19 08:32:12,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:12,179 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:12,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-19 08:32:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2022-11-19 08:32:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2363. [2022-11-19 08:32:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2246 states have (on average 4.16073018699911) internal successors, (9345), 2362 states have internal predecessors, (9345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 9345 transitions. [2022-11-19 08:32:12,229 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 9345 transitions. Word has length 25 [2022-11-19 08:32:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:12,229 INFO L495 AbstractCegarLoop]: Abstraction has 2363 states and 9345 transitions. [2022-11-19 08:32:12,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 9345 transitions. [2022-11-19 08:32:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:12,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:12,230 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:12,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:12,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:12,430 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:12,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1205839390, now seen corresponding path program 1 times [2022-11-19 08:32:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:12,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775701558] [2022-11-19 08:32:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:12,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:12,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:12,432 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:12,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-19 08:32:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:13,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:32:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:13,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:13,113 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-19 08:32:13,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:32:13,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:13,412 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 08:32:13,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-19 08:32:22,827 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 50 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:23,362 INFO L321 Elim1Store]: treesize reduction 40, result has 60.0 percent of original size [2022-11-19 08:32:23,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 116 [2022-11-19 08:32:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:28,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:28,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:28,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775701558] [2022-11-19 08:32:28,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775701558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:28,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:28,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:28,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326889620] [2022-11-19 08:32:28,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:28,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:28,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:28,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-19 08:32:28,971 INFO L87 Difference]: Start difference. First operand 2363 states and 9345 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:29,159 INFO L93 Difference]: Finished difference Result 2364 states and 9348 transitions. [2022-11-19 08:32:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:32:29,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:29,169 INFO L225 Difference]: With dead ends: 2364 [2022-11-19 08:32:29,169 INFO L226 Difference]: Without dead ends: 2364 [2022-11-19 08:32:29,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-19 08:32:29,170 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:29,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-11-19 08:32:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-11-19 08:32:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2022-11-19 08:32:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2247 states have (on average 4.1602136181575435) internal successors, (9348), 2363 states have internal predecessors, (9348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 9348 transitions. [2022-11-19 08:32:29,235 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 9348 transitions. Word has length 25 [2022-11-19 08:32:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:29,236 INFO L495 AbstractCegarLoop]: Abstraction has 2364 states and 9348 transitions. [2022-11-19 08:32:29,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 9348 transitions. [2022-11-19 08:32:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:29,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:29,237 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:29,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:29,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:29,439 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1205839389, now seen corresponding path program 1 times [2022-11-19 08:32:29,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:29,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925329464] [2022-11-19 08:32:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:29,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:29,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:29,442 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:29,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-19 08:32:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:32:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:30,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:30,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:30,210 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:32:30,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:32:30,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:32:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:30,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:32:30,406 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:32:30,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:32:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:30,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:30,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:30,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925329464] [2022-11-19 08:32:30,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925329464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:30,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:30,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460454383] [2022-11-19 08:32:30,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:30,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:30,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:30,705 INFO L87 Difference]: Start difference. First operand 2364 states and 9348 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:30,982 INFO L93 Difference]: Finished difference Result 2364 states and 9347 transitions. [2022-11-19 08:32:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:30,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:30,990 INFO L225 Difference]: With dead ends: 2364 [2022-11-19 08:32:30,991 INFO L226 Difference]: Without dead ends: 2364 [2022-11-19 08:32:30,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:30,991 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:30,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-11-19 08:32:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2022-11-19 08:32:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2022-11-19 08:32:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2247 states have (on average 4.159768580329328) internal successors, (9347), 2363 states have internal predecessors, (9347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 9347 transitions. [2022-11-19 08:32:31,055 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 9347 transitions. Word has length 25 [2022-11-19 08:32:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:31,055 INFO L495 AbstractCegarLoop]: Abstraction has 2364 states and 9347 transitions. [2022-11-19 08:32:31,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 9347 transitions. [2022-11-19 08:32:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:31,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:31,057 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:31,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:31,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:31,267 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1205939318, now seen corresponding path program 1 times [2022-11-19 08:32:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:31,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850445821] [2022-11-19 08:32:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:31,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:31,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:31,269 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:31,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:31,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:32:31,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:31,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:31,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850445821] [2022-11-19 08:32:31,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850445821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:31,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:31,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:31,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537904324] [2022-11-19 08:32:31,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:31,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:32:31,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:32:31,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:31,858 INFO L87 Difference]: Start difference. First operand 2364 states and 9347 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:32,113 INFO L93 Difference]: Finished difference Result 1909 states and 7322 transitions. [2022-11-19 08:32:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:32,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:32,118 INFO L225 Difference]: With dead ends: 1909 [2022-11-19 08:32:32,119 INFO L226 Difference]: Without dead ends: 1909 [2022-11-19 08:32:32,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:32,119 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:32,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:32:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-11-19 08:32:32,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1909. [2022-11-19 08:32:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1819 states have (on average 4.0252886201209455) internal successors, (7322), 1908 states have internal predecessors, (7322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 7322 transitions. [2022-11-19 08:32:32,152 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 7322 transitions. Word has length 25 [2022-11-19 08:32:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:32,153 INFO L495 AbstractCegarLoop]: Abstraction has 1909 states and 7322 transitions. [2022-11-19 08:32:32,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 7322 transitions. [2022-11-19 08:32:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:32,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:32,153 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:32,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:32,354 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1205939316, now seen corresponding path program 1 times [2022-11-19 08:32:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:32,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616673507] [2022-11-19 08:32:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:32,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:32,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:32,356 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:32,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-19 08:32:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:32:32,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:32,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:32,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:32,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616673507] [2022-11-19 08:32:32,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616673507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:32,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:32,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902267254] [2022-11-19 08:32:32,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:32,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:32,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:32,866 INFO L87 Difference]: Start difference. First operand 1909 states and 7322 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:33,114 INFO L93 Difference]: Finished difference Result 1454 states and 5297 transitions. [2022-11-19 08:32:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:33,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:33,118 INFO L225 Difference]: With dead ends: 1454 [2022-11-19 08:32:33,118 INFO L226 Difference]: Without dead ends: 1454 [2022-11-19 08:32:33,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:33,119 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:33,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:32:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-11-19 08:32:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2022-11-19 08:32:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1391 states have (on average 3.8080517613227896) internal successors, (5297), 1453 states have internal predecessors, (5297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 5297 transitions. [2022-11-19 08:32:33,143 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 5297 transitions. Word has length 25 [2022-11-19 08:32:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:33,143 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 5297 transitions. [2022-11-19 08:32:33,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 5297 transitions. [2022-11-19 08:32:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:33,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:33,144 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:33,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:33,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:33,344 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1106290361, now seen corresponding path program 3 times [2022-11-19 08:32:33,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:33,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870973595] [2022-11-19 08:32:33,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:32:33,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:33,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:33,346 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:33,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-19 08:32:33,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:32:33,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:32:33,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:33,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:33,808 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-19 08:32:33,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-19 08:32:33,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:33,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:34,002 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:32:34,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:34,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:34,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:34,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870973595] [2022-11-19 08:32:34,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870973595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:34,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:34,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416969075] [2022-11-19 08:32:34,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:34,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:34,200 INFO L87 Difference]: Start difference. First operand 1454 states and 5297 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:34,460 INFO L93 Difference]: Finished difference Result 1453 states and 5294 transitions. [2022-11-19 08:32:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:34,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:34,463 INFO L225 Difference]: With dead ends: 1453 [2022-11-19 08:32:34,463 INFO L226 Difference]: Without dead ends: 1453 [2022-11-19 08:32:34,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:34,464 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:34,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-19 08:32:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-11-19 08:32:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1451. [2022-11-19 08:32:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1388 states have (on average 3.8105187319884726) internal successors, (5289), 1450 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 5289 transitions. [2022-11-19 08:32:34,494 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 5289 transitions. Word has length 25 [2022-11-19 08:32:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:34,494 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 5289 transitions. [2022-11-19 08:32:34,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 5289 transitions. [2022-11-19 08:32:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:34,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:34,495 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:34,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:34,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:34,695 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1106154957, now seen corresponding path program 2 times [2022-11-19 08:32:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:34,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506436204] [2022-11-19 08:32:34,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:32:34,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:34,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:34,697 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:34,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:35,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:32:35,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:35,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:32:35,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:35,147 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:32:35,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-19 08:32:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:35,530 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-19 08:32:35,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 54 [2022-11-19 08:32:35,700 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:32:35,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:32:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:32:35,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:35,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506436204] [2022-11-19 08:32:35,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506436204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:35,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:35,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:32:35,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113144196] [2022-11-19 08:32:35,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:35,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:32:35,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:32:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:35,967 INFO L87 Difference]: Start difference. First operand 1451 states and 5289 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:36,115 INFO L93 Difference]: Finished difference Result 1443 states and 5275 transitions. [2022-11-19 08:32:36,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:36,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:36,119 INFO L225 Difference]: With dead ends: 1443 [2022-11-19 08:32:36,120 INFO L226 Difference]: Without dead ends: 1443 [2022-11-19 08:32:36,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:36,120 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:36,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-11-19 08:32:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-11-19 08:32:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1443. [2022-11-19 08:32:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1382 states have (on average 3.816931982633864) internal successors, (5275), 1442 states have internal predecessors, (5275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5275 transitions. [2022-11-19 08:32:36,142 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5275 transitions. Word has length 25 [2022-11-19 08:32:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:36,143 INFO L495 AbstractCegarLoop]: Abstraction has 1443 states and 5275 transitions. [2022-11-19 08:32:36,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5275 transitions. [2022-11-19 08:32:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:32:36,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:36,143 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:36,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:36,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:36,344 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1106152911, now seen corresponding path program 1 times [2022-11-19 08:32:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:36,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031474535] [2022-11-19 08:32:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:36,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:36,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:36,346 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:36,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-19 08:32:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:36,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:32:36,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:37,074 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:32:37,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-19 08:32:37,368 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-19 08:32:37,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-19 08:32:38,013 INFO L321 Elim1Store]: treesize reduction 36, result has 64.0 percent of original size [2022-11-19 08:32:38,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 121 [2022-11-19 08:32:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:39,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:39,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:39,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031474535] [2022-11-19 08:32:39,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031474535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:39,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:39,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:32:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243273042] [2022-11-19 08:32:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:39,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:32:39,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:39,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:32:39,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:32:39,940 INFO L87 Difference]: Start difference. First operand 1443 states and 5275 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:40,081 INFO L93 Difference]: Finished difference Result 1442 states and 5274 transitions. [2022-11-19 08:32:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:32:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 08:32:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:40,085 INFO L225 Difference]: With dead ends: 1442 [2022-11-19 08:32:40,085 INFO L226 Difference]: Without dead ends: 1442 [2022-11-19 08:32:40,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:32:40,086 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:40,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:32:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-11-19 08:32:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1442. [2022-11-19 08:32:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1382 states have (on average 3.816208393632417) internal successors, (5274), 1441 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5274 transitions. [2022-11-19 08:32:40,120 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5274 transitions. Word has length 25 [2022-11-19 08:32:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:40,120 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 5274 transitions. [2022-11-19 08:32:40,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5274 transitions. [2022-11-19 08:32:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:40,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:40,121 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:40,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-19 08:32:40,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:40,339 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1659113139, now seen corresponding path program 1 times [2022-11-19 08:32:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:40,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840614742] [2022-11-19 08:32:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:40,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:40,340 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:40,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-19 08:32:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:40,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:32:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:41,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:41,084 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-19 08:32:41,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-19 08:32:41,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:41,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:41,282 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:32:41,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:41,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:41,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840614742] [2022-11-19 08:32:41,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840614742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:41,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:41,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:41,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470074525] [2022-11-19 08:32:41,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:41,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:41,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:41,463 INFO L87 Difference]: Start difference. First operand 1442 states and 5274 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:41,715 INFO L93 Difference]: Finished difference Result 1443 states and 5279 transitions. [2022-11-19 08:32:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:41,719 INFO L225 Difference]: With dead ends: 1443 [2022-11-19 08:32:41,720 INFO L226 Difference]: Without dead ends: 1443 [2022-11-19 08:32:41,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:41,720 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:41,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-11-19 08:32:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-11-19 08:32:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1443. [2022-11-19 08:32:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1383 states have (on average 3.81706435285611) internal successors, (5279), 1442 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5279 transitions. [2022-11-19 08:32:41,762 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5279 transitions. Word has length 26 [2022-11-19 08:32:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:41,762 INFO L495 AbstractCegarLoop]: Abstraction has 1443 states and 5279 transitions. [2022-11-19 08:32:41,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5279 transitions. [2022-11-19 08:32:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:41,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:41,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:41,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:41,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:41,963 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1659113140, now seen corresponding path program 1 times [2022-11-19 08:32:41,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:41,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044503393] [2022-11-19 08:32:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:41,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:41,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:41,966 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:41,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:32:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:42,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:42,782 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:32:42,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:32:42,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:32:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:42,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:32:42,990 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:32:42,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:32:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:43,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:43,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:43,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044503393] [2022-11-19 08:32:43,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044503393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:43,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:43,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:43,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757580901] [2022-11-19 08:32:43,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:43,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:43,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:43,263 INFO L87 Difference]: Start difference. First operand 1443 states and 5279 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:43,482 INFO L93 Difference]: Finished difference Result 1445 states and 5286 transitions. [2022-11-19 08:32:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:43,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:43,487 INFO L225 Difference]: With dead ends: 1445 [2022-11-19 08:32:43,488 INFO L226 Difference]: Without dead ends: 1445 [2022-11-19 08:32:43,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:43,488 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:43,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-11-19 08:32:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-11-19 08:32:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1444. [2022-11-19 08:32:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1384 states have (on average 3.8171965317919074) internal successors, (5283), 1443 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5283 transitions. [2022-11-19 08:32:43,515 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5283 transitions. Word has length 26 [2022-11-19 08:32:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:43,515 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 5283 transitions. [2022-11-19 08:32:43,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5283 transitions. [2022-11-19 08:32:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:43,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:43,516 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:43,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:43,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:43,716 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:43,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1659112457, now seen corresponding path program 1 times [2022-11-19 08:32:43,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:43,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674002658] [2022-11-19 08:32:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:43,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:43,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:43,718 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:43,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-19 08:32:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:32:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:44,515 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-19 08:32:44,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-19 08:32:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:44,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:44,730 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:32:44,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:44,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:44,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:44,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674002658] [2022-11-19 08:32:44,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674002658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:44,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:44,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:44,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795037420] [2022-11-19 08:32:44,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:44,896 INFO L87 Difference]: Start difference. First operand 1444 states and 5283 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:45,139 INFO L93 Difference]: Finished difference Result 1447 states and 5293 transitions. [2022-11-19 08:32:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:45,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:45,144 INFO L225 Difference]: With dead ends: 1447 [2022-11-19 08:32:45,144 INFO L226 Difference]: Without dead ends: 1447 [2022-11-19 08:32:45,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:45,144 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:45,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-11-19 08:32:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2022-11-19 08:32:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1445. [2022-11-19 08:32:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1385 states have (on average 3.8180505415162456) internal successors, (5288), 1444 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 5288 transitions. [2022-11-19 08:32:45,177 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 5288 transitions. Word has length 26 [2022-11-19 08:32:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:45,178 INFO L495 AbstractCegarLoop]: Abstraction has 1445 states and 5288 transitions. [2022-11-19 08:32:45,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 5288 transitions. [2022-11-19 08:32:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:45,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:45,179 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:45,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:45,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:45,395 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1659112458, now seen corresponding path program 1 times [2022-11-19 08:32:45,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:45,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839369669] [2022-11-19 08:32:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:45,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:45,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:45,398 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:45,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-19 08:32:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:32:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:46,193 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:32:46,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:32:46,213 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 271 treesize of output 265 [2022-11-19 08:32:46,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:46,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:32:46,410 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:32:46,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:32:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:46,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:46,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839369669] [2022-11-19 08:32:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839369669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:46,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:46,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:46,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149810485] [2022-11-19 08:32:46,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:46,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:46,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:46,688 INFO L87 Difference]: Start difference. First operand 1445 states and 5288 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:46,914 INFO L93 Difference]: Finished difference Result 1444 states and 5283 transitions. [2022-11-19 08:32:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:46,918 INFO L225 Difference]: With dead ends: 1444 [2022-11-19 08:32:46,918 INFO L226 Difference]: Without dead ends: 1444 [2022-11-19 08:32:46,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:46,919 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:46,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-11-19 08:32:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-11-19 08:32:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1444. [2022-11-19 08:32:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1384 states have (on average 3.8171965317919074) internal successors, (5283), 1443 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5283 transitions. [2022-11-19 08:32:46,988 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5283 transitions. Word has length 26 [2022-11-19 08:32:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:46,988 INFO L495 AbstractCegarLoop]: Abstraction has 1444 states and 5283 transitions. [2022-11-19 08:32:46,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5283 transitions. [2022-11-19 08:32:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:46,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:46,989 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:47,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:47,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:47,191 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1659114472, now seen corresponding path program 1 times [2022-11-19 08:32:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904321998] [2022-11-19 08:32:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:47,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:47,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:47,193 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:47,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:47,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:32:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:47,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:47,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:47,891 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-19 08:32:47,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:32:48,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:48,189 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 08:32:48,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-19 08:32:48,925 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 08:32:48,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 08:32:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:49,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:49,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:49,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904321998] [2022-11-19 08:32:49,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904321998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:49,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:49,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:49,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378037801] [2022-11-19 08:32:49,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:49,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:32:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:32:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:49,504 INFO L87 Difference]: Start difference. First operand 1444 states and 5283 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:49,643 INFO L93 Difference]: Finished difference Result 1445 states and 5287 transitions. [2022-11-19 08:32:49,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:49,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:49,648 INFO L225 Difference]: With dead ends: 1445 [2022-11-19 08:32:49,648 INFO L226 Difference]: Without dead ends: 1445 [2022-11-19 08:32:49,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:49,648 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:49,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-19 08:32:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-11-19 08:32:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1445. [2022-11-19 08:32:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1385 states have (on average 3.8173285198555957) internal successors, (5287), 1444 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 5287 transitions. [2022-11-19 08:32:49,685 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 5287 transitions. Word has length 26 [2022-11-19 08:32:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:49,685 INFO L495 AbstractCegarLoop]: Abstraction has 1445 states and 5287 transitions. [2022-11-19 08:32:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 5287 transitions. [2022-11-19 08:32:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:49,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:49,686 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:49,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:49,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:49,902 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1659114473, now seen corresponding path program 1 times [2022-11-19 08:32:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:49,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67676065] [2022-11-19 08:32:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:49,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:49,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:49,904 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:49,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-19 08:32:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:32:50,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:50,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:50,667 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:32:50,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:32:50,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:32:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:50,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:32:50,866 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:32:50,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:32:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:51,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:51,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:51,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67676065] [2022-11-19 08:32:51,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67676065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:51,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:51,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:51,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349908286] [2022-11-19 08:32:51,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:51,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:51,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:51,138 INFO L87 Difference]: Start difference. First operand 1445 states and 5287 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:51,409 INFO L93 Difference]: Finished difference Result 1445 states and 5286 transitions. [2022-11-19 08:32:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:51,415 INFO L225 Difference]: With dead ends: 1445 [2022-11-19 08:32:51,415 INFO L226 Difference]: Without dead ends: 1445 [2022-11-19 08:32:51,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:51,415 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:51,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-11-19 08:32:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-11-19 08:32:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1445. [2022-11-19 08:32:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1385 states have (on average 3.816606498194946) internal successors, (5286), 1444 states have internal predecessors, (5286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 5286 transitions. [2022-11-19 08:32:51,442 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 5286 transitions. Word has length 26 [2022-11-19 08:32:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:51,443 INFO L495 AbstractCegarLoop]: Abstraction has 1445 states and 5286 transitions. [2022-11-19 08:32:51,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 5286 transitions. [2022-11-19 08:32:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:51,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:51,443 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:51,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:32:51,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:51,644 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:51,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1659114503, now seen corresponding path program 1 times [2022-11-19 08:32:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:51,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836560582] [2022-11-19 08:32:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:51,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:51,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:51,647 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:51,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-19 08:32:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:52,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:32:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:52,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:52,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:52,369 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-19 08:32:52,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:32:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:52,695 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-19 08:32:52,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-19 08:32:53,466 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 08:32:53,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 08:32:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:54,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:54,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:54,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836560582] [2022-11-19 08:32:54,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836560582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:54,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:54,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:54,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482236264] [2022-11-19 08:32:54,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:54,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:32:54,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:54,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:32:54,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:54,114 INFO L87 Difference]: Start difference. First operand 1445 states and 5286 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:54,254 INFO L93 Difference]: Finished difference Result 1446 states and 5290 transitions. [2022-11-19 08:32:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:32:54,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:54,258 INFO L225 Difference]: With dead ends: 1446 [2022-11-19 08:32:54,258 INFO L226 Difference]: Without dead ends: 1446 [2022-11-19 08:32:54,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:32:54,258 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:54,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:32:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-11-19 08:32:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1446. [2022-11-19 08:32:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1386 states have (on average 3.8167388167388165) internal successors, (5290), 1445 states have internal predecessors, (5290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 5290 transitions. [2022-11-19 08:32:54,284 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 5290 transitions. Word has length 26 [2022-11-19 08:32:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:54,284 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 5290 transitions. [2022-11-19 08:32:54,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 5290 transitions. [2022-11-19 08:32:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:54,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:54,285 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:54,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:54,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:54,485 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:54,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1659114504, now seen corresponding path program 1 times [2022-11-19 08:32:54,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:54,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863632396] [2022-11-19 08:32:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:54,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:54,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:54,487 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:54,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:55,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:32:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:55,322 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:32:55,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:32:55,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 174 [2022-11-19 08:32:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:55,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:32:55,555 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:32:55,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:32:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:55,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:55,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:55,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863632396] [2022-11-19 08:32:55,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863632396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:55,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:55,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177652253] [2022-11-19 08:32:55,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:55,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:55,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:55,848 INFO L87 Difference]: Start difference. First operand 1446 states and 5290 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:56,104 INFO L93 Difference]: Finished difference Result 1446 states and 5289 transitions. [2022-11-19 08:32:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:56,109 INFO L225 Difference]: With dead ends: 1446 [2022-11-19 08:32:56,109 INFO L226 Difference]: Without dead ends: 1446 [2022-11-19 08:32:56,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:56,109 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:56,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-11-19 08:32:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-11-19 08:32:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1446. [2022-11-19 08:32:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1386 states have (on average 3.816017316017316) internal successors, (5289), 1445 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 5289 transitions. [2022-11-19 08:32:56,136 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 5289 transitions. Word has length 26 [2022-11-19 08:32:56,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:56,136 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 5289 transitions. [2022-11-19 08:32:56,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 5289 transitions. [2022-11-19 08:32:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:56,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:56,137 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:56,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:32:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:56,354 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:56,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1658943197, now seen corresponding path program 2 times [2022-11-19 08:32:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:56,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976092299] [2022-11-19 08:32:56,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:32:56,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:56,356 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:56,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-19 08:32:56,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:32:56,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:32:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:56,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:56,874 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-19 08:32:56,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-19 08:32:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:56,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:57,061 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:32:57,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:32:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:57,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:57,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:57,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976092299] [2022-11-19 08:32:57,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976092299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:57,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:57,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:32:57,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534328593] [2022-11-19 08:32:57,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:57,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:57,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:57,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:57,243 INFO L87 Difference]: Start difference. First operand 1446 states and 5289 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:57,489 INFO L93 Difference]: Finished difference Result 1449 states and 5298 transitions. [2022-11-19 08:32:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:57,494 INFO L225 Difference]: With dead ends: 1449 [2022-11-19 08:32:57,494 INFO L226 Difference]: Without dead ends: 1449 [2022-11-19 08:32:57,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:32:57,495 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:57,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-19 08:32:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-11-19 08:32:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1447. [2022-11-19 08:32:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1387 states have (on average 3.8154289834174477) internal successors, (5292), 1446 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 5292 transitions. [2022-11-19 08:32:57,537 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 5292 transitions. Word has length 26 [2022-11-19 08:32:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:57,537 INFO L495 AbstractCegarLoop]: Abstraction has 1447 states and 5292 transitions. [2022-11-19 08:32:57,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 5292 transitions. [2022-11-19 08:32:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:57,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:57,538 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:57,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-19 08:32:57,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:57,739 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1658944344, now seen corresponding path program 1 times [2022-11-19 08:32:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:57,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420541765] [2022-11-19 08:32:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:57,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:57,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:57,741 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:57,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-19 08:32:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:58,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:32:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:58,497 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:32:58,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-19 08:32:58,555 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:32:58,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:32:58,636 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:32:58,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-19 08:32:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:32:58,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:58,952 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:32:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420541765] [2022-11-19 08:32:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420541765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:58,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:58,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:32:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573628303] [2022-11-19 08:32:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:58,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:32:58,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:32:58,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:32:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:32:58,953 INFO L87 Difference]: Start difference. First operand 1447 states and 5292 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:59,220 INFO L93 Difference]: Finished difference Result 1519 states and 5515 transitions. [2022-11-19 08:32:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:32:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:32:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:59,225 INFO L225 Difference]: With dead ends: 1519 [2022-11-19 08:32:59,225 INFO L226 Difference]: Without dead ends: 1519 [2022-11-19 08:32:59,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:32:59,225 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:59,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-11-19 08:32:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-11-19 08:32:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1468. [2022-11-19 08:32:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1408 states have (on average 3.823153409090909) internal successors, (5383), 1467 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 5383 transitions. [2022-11-19 08:32:59,248 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 5383 transitions. Word has length 26 [2022-11-19 08:32:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:59,248 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 5383 transitions. [2022-11-19 08:32:59,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 5383 transitions. [2022-11-19 08:32:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:32:59,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:59,249 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:59,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:59,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:59,451 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:32:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:59,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1658944345, now seen corresponding path program 1 times [2022-11-19 08:32:59,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:32:59,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103601002] [2022-11-19 08:32:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:59,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:32:59,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:32:59,452 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:32:59,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:33:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:00,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:33:00,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:00,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:00,320 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:33:00,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:33:00,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:33:00,398 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:00,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:00,527 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:33:00,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:33:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:00,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:00,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103601002] [2022-11-19 08:33:00,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103601002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:00,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:00,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:00,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816292366] [2022-11-19 08:33:00,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:00,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:00,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:00,792 INFO L87 Difference]: Start difference. First operand 1468 states and 5383 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:00,985 INFO L93 Difference]: Finished difference Result 1461 states and 5345 transitions. [2022-11-19 08:33:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:33:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:33:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:00,989 INFO L225 Difference]: With dead ends: 1461 [2022-11-19 08:33:00,989 INFO L226 Difference]: Without dead ends: 1461 [2022-11-19 08:33:00,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:00,990 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:00,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-19 08:33:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-11-19 08:33:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1461. [2022-11-19 08:33:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1401 states have (on average 3.8151320485367592) internal successors, (5345), 1460 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 5345 transitions. [2022-11-19 08:33:01,012 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 5345 transitions. Word has length 26 [2022-11-19 08:33:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:01,012 INFO L495 AbstractCegarLoop]: Abstraction has 1461 states and 5345 transitions. [2022-11-19 08:33:01,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 5345 transitions. [2022-11-19 08:33:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:33:01,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:01,013 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:01,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:33:01,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:01,215 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:01,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1666006547, now seen corresponding path program 3 times [2022-11-19 08:33:01,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:01,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594814189] [2022-11-19 08:33:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:33:01,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:01,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:01,217 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:01,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-19 08:33:01,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:33:01,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:33:01,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:33:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:01,743 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-19 08:33:01,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-19 08:33:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:01,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:33:01,928 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 08:33:01,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:33:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:02,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:02,106 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594814189] [2022-11-19 08:33:02,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594814189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:02,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:02,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:02,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188140506] [2022-11-19 08:33:02,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:02,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:02,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:02,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:02,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:02,108 INFO L87 Difference]: Start difference. First operand 1461 states and 5345 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:02,368 INFO L93 Difference]: Finished difference Result 1463 states and 5352 transitions. [2022-11-19 08:33:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:02,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:33:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:02,373 INFO L225 Difference]: With dead ends: 1463 [2022-11-19 08:33:02,373 INFO L226 Difference]: Without dead ends: 1463 [2022-11-19 08:33:02,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:02,374 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:02,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-11-19 08:33:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-11-19 08:33:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1462. [2022-11-19 08:33:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1402 states have (on average 3.8145506419400856) internal successors, (5348), 1461 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5348 transitions. [2022-11-19 08:33:02,398 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5348 transitions. Word has length 26 [2022-11-19 08:33:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:02,398 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 5348 transitions. [2022-11-19 08:33:02,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5348 transitions. [2022-11-19 08:33:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:33:02,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:02,399 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:02,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:02,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:02,599 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1666007694, now seen corresponding path program 2 times [2022-11-19 08:33:02,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:02,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421704220] [2022-11-19 08:33:02,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:33:02,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:02,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:02,601 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:02,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-19 08:33:03,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:33:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:33:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:33:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:03,157 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 08:33:03,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-19 08:33:03,215 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:33:03,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 08:33:03,296 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:33:03,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-19 08:33:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:03,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:03,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:03,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421704220] [2022-11-19 08:33:03,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421704220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:03,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:03,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:33:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96472145] [2022-11-19 08:33:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:03,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:33:03,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:33:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:33:03,566 INFO L87 Difference]: Start difference. First operand 1462 states and 5348 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:03,821 INFO L93 Difference]: Finished difference Result 1371 states and 5035 transitions. [2022-11-19 08:33:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:03,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:33:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:03,825 INFO L225 Difference]: With dead ends: 1371 [2022-11-19 08:33:03,826 INFO L226 Difference]: Without dead ends: 1371 [2022-11-19 08:33:03,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:33:03,826 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:03,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:33:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-11-19 08:33:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1346. [2022-11-19 08:33:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1298 states have (on average 3.8120184899845917) internal successors, (4948), 1345 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4948 transitions. [2022-11-19 08:33:03,848 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4948 transitions. Word has length 26 [2022-11-19 08:33:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:03,848 INFO L495 AbstractCegarLoop]: Abstraction has 1346 states and 4948 transitions. [2022-11-19 08:33:03,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4948 transitions. [2022-11-19 08:33:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:33:03,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:03,849 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:03,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:04,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:04,049 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1273648905, now seen corresponding path program 1 times [2022-11-19 08:33:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:04,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638643516] [2022-11-19 08:33:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:04,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:04,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:04,051 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:04,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:33:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:04,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:33:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:04,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:04,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:05,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:05,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638643516] [2022-11-19 08:33:05,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638643516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:05,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [903518822] [2022-11-19 08:33:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:05,159 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:33:05,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:33:05,161 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:33:05,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-19 08:33:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:33:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:06,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:06,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:06,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [903518822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:06,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918541421] [2022-11-19 08:33:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:06,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:06,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:06,489 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:06,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-19 08:33:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:07,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:33:07,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:07,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:07,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:07,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918541421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:07,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:33:07,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2022-11-19 08:33:07,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622474870] [2022-11-19 08:33:07,258 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:07,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:33:07,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:33:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:33:07,259 INFO L87 Difference]: Start difference. First operand 1346 states and 4948 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:08,746 INFO L93 Difference]: Finished difference Result 3982 states and 14234 transitions. [2022-11-19 08:33:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:33:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:33:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:08,757 INFO L225 Difference]: With dead ends: 3982 [2022-11-19 08:33:08,758 INFO L226 Difference]: Without dead ends: 3982 [2022-11-19 08:33:08,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:33:08,758 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 285 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:08,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 0 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:33:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2022-11-19 08:33:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 2446. [2022-11-19 08:33:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 2398 states have (on average 4.191826522101752) internal successors, (10052), 2445 states have internal predecessors, (10052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 10052 transitions. [2022-11-19 08:33:08,809 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 10052 transitions. Word has length 26 [2022-11-19 08:33:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:08,810 INFO L495 AbstractCegarLoop]: Abstraction has 2446 states and 10052 transitions. [2022-11-19 08:33:08,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 10052 transitions. [2022-11-19 08:33:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:33:08,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:08,811 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:08,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:09,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-19 08:33:09,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:33:09,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:09,415 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:09,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1273648972, now seen corresponding path program 1 times [2022-11-19 08:33:09,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:09,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275554533] [2022-11-19 08:33:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:09,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:09,417 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:09,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:33:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:33:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:10,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:10,375 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:33:10,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:33:10,396 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 510 treesize of output 494 [2022-11-19 08:33:10,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:10,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:10,646 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:10,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:10,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:10,937 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:10,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275554533] [2022-11-19 08:33:10,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275554533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:10,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:10,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:10,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17648840] [2022-11-19 08:33:10,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:10,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:10,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:10,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:10,939 INFO L87 Difference]: Start difference. First operand 2446 states and 10052 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:11,169 INFO L93 Difference]: Finished difference Result 2439 states and 10022 transitions. [2022-11-19 08:33:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:11,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:33:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:11,176 INFO L225 Difference]: With dead ends: 2439 [2022-11-19 08:33:11,177 INFO L226 Difference]: Without dead ends: 2439 [2022-11-19 08:33:11,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:11,177 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:11,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-11-19 08:33:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-11-19 08:33:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2439. [2022-11-19 08:33:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2391 states have (on average 4.19155165202844) internal successors, (10022), 2438 states have internal predecessors, (10022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 10022 transitions. [2022-11-19 08:33:11,221 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 10022 transitions. Word has length 26 [2022-11-19 08:33:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:11,221 INFO L495 AbstractCegarLoop]: Abstraction has 2439 states and 10022 transitions. [2022-11-19 08:33:11,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 10022 transitions. [2022-11-19 08:33:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:33:11,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:11,222 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:11,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-19 08:33:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:11,435 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1273648830, now seen corresponding path program 1 times [2022-11-19 08:33:11,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:11,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403308107] [2022-11-19 08:33:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:11,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:11,437 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:11,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-19 08:33:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:33:12,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:12,303 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:33:12,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:33:12,434 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:33:12,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:33:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:12,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:12,567 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:33:12,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:33:12,621 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:33:12,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:12,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:15,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403308107] [2022-11-19 08:33:15,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403308107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2004424309] [2022-11-19 08:33:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:33:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:33:15,512 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:33:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-19 08:33:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:33:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:17,565 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:33:17,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:33:17,688 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:33:17,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:33:17,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:17,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:17,770 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:33:17,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:33:17,811 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:33:17,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:17,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2004424309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338909111] [2022-11-19 08:33:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:19,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:19,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:19,005 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:19,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-19 08:33:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:33:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:19,771 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:33:19,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:33:19,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:19,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:19,871 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:33:19,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:33:19,913 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:33:19,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:33:20,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:20,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:33:20,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 68 [2022-11-19 08:33:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 5 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:33:23,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338909111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:23,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:33:23,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5, 5, 6, 6] total 12 [2022-11-19 08:33:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453254711] [2022-11-19 08:33:23,185 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:23,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:33:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:23,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:33:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2022-11-19 08:33:23,186 INFO L87 Difference]: Start difference. First operand 2439 states and 10022 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:24,683 INFO L93 Difference]: Finished difference Result 3239 states and 11531 transitions. [2022-11-19 08:33:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:33:24,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:33:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:24,692 INFO L225 Difference]: With dead ends: 3239 [2022-11-19 08:33:24,693 INFO L226 Difference]: Without dead ends: 3239 [2022-11-19 08:33:24,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 131 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2022-11-19 08:33:24,693 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 243 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:24,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 0 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 233 Unchecked, 1.2s Time] [2022-11-19 08:33:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2022-11-19 08:33:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2439. [2022-11-19 08:33:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2391 states have (on average 3.96194061062317) internal successors, (9473), 2438 states have internal predecessors, (9473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 9473 transitions. [2022-11-19 08:33:24,783 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 9473 transitions. Word has length 26 [2022-11-19 08:33:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:24,783 INFO L495 AbstractCegarLoop]: Abstraction has 2439 states and 9473 transitions. [2022-11-19 08:33:24,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 9473 transitions. [2022-11-19 08:33:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:33:24,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:24,784 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:24,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-19 08:33:24,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:25,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-19 08:33:25,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:25,385 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:25,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1270595137, now seen corresponding path program 1 times [2022-11-19 08:33:25,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:25,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669587285] [2022-11-19 08:33:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:25,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:25,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:25,388 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:25,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-19 08:33:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:33:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:26,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:26,170 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:33:26,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:26,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:26,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:26,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669587285] [2022-11-19 08:33:26,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669587285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:26,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:26,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:33:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448692225] [2022-11-19 08:33:26,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:26,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:26,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:26,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:26,261 INFO L87 Difference]: Start difference. First operand 2439 states and 9473 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:26,742 INFO L93 Difference]: Finished difference Result 3581 states and 14053 transitions. [2022-11-19 08:33:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:33:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:33:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:26,753 INFO L225 Difference]: With dead ends: 3581 [2022-11-19 08:33:26,754 INFO L226 Difference]: Without dead ends: 3581 [2022-11-19 08:33:26,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:33:26,754 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:26,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:33:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2022-11-19 08:33:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 2819. [2022-11-19 08:33:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2771 states have (on average 4.243594370263443) internal successors, (11759), 2818 states have internal predecessors, (11759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 11759 transitions. [2022-11-19 08:33:26,818 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 11759 transitions. Word has length 26 [2022-11-19 08:33:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:26,818 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 11759 transitions. [2022-11-19 08:33:26,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 11759 transitions. [2022-11-19 08:33:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:33:26,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:26,819 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:26,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-19 08:33:27,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:27,020 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:27,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1270595299, now seen corresponding path program 1 times [2022-11-19 08:33:27,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:27,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336499855] [2022-11-19 08:33:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:27,021 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 [2022-11-19 08:33:27,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:27,022 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:27,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-19 08:33:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:27,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:33:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:27,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:27,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:27,763 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336499855] [2022-11-19 08:33:27,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336499855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:27,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:27,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:33:27,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326030067] [2022-11-19 08:33:27,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:27,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:27,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:27,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:27,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:27,764 INFO L87 Difference]: Start difference. First operand 2819 states and 11759 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:28,245 INFO L93 Difference]: Finished difference Result 3201 states and 12527 transitions. [2022-11-19 08:33:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:33:28,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:33:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:28,255 INFO L225 Difference]: With dead ends: 3201 [2022-11-19 08:33:28,255 INFO L226 Difference]: Without dead ends: 3201 [2022-11-19 08:33:28,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:33:28,255 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:28,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:33:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2022-11-19 08:33:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2819. [2022-11-19 08:33:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2771 states have (on average 4.106459761818838) internal successors, (11379), 2818 states have internal predecessors, (11379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 11379 transitions. [2022-11-19 08:33:28,305 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 11379 transitions. Word has length 26 [2022-11-19 08:33:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:28,305 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 11379 transitions. [2022-11-19 08:33:28,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 11379 transitions. [2022-11-19 08:33:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:28,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:28,307 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:28,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:28,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:28,523 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash -107101590, now seen corresponding path program 1 times [2022-11-19 08:33:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578134284] [2022-11-19 08:33:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:28,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:28,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:28,524 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:28,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-19 08:33:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:33:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:29,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,433 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:33:29,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:33:29,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:33:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:29,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:29,630 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:29,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:29,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:29,937 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:29,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578134284] [2022-11-19 08:33:29,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578134284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:29,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:29,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:29,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466539331] [2022-11-19 08:33:29,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:29,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:29,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:29,938 INFO L87 Difference]: Start difference. First operand 2819 states and 11379 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:30,174 INFO L93 Difference]: Finished difference Result 2818 states and 11376 transitions. [2022-11-19 08:33:30,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:30,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:30,182 INFO L225 Difference]: With dead ends: 2818 [2022-11-19 08:33:30,182 INFO L226 Difference]: Without dead ends: 2818 [2022-11-19 08:33:30,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:30,182 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:30,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-11-19 08:33:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2022-11-19 08:33:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2818. [2022-11-19 08:33:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2770 states have (on average 4.106859205776173) internal successors, (11376), 2817 states have internal predecessors, (11376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 11376 transitions. [2022-11-19 08:33:30,232 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 11376 transitions. Word has length 27 [2022-11-19 08:33:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:30,232 INFO L495 AbstractCegarLoop]: Abstraction has 2818 states and 11376 transitions. [2022-11-19 08:33:30,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 11376 transitions. [2022-11-19 08:33:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:30,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:30,233 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:30,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-19 08:33:30,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:30,433 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:30,434 INFO L85 PathProgramCache]: Analyzing trace with hash -107099544, now seen corresponding path program 1 times [2022-11-19 08:33:30,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:30,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155243070] [2022-11-19 08:33:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:30,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:30,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:30,435 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:30,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-19 08:33:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:31,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:33:31,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:31,326 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:33:31,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:33:31,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:33:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:31,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:31,515 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:31,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:31,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:31,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155243070] [2022-11-19 08:33:31,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155243070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:31,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:31,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:31,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191519900] [2022-11-19 08:33:31,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:31,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:31,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:31,859 INFO L87 Difference]: Start difference. First operand 2818 states and 11376 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:32,105 INFO L93 Difference]: Finished difference Result 2819 states and 11378 transitions. [2022-11-19 08:33:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:32,113 INFO L225 Difference]: With dead ends: 2819 [2022-11-19 08:33:32,114 INFO L226 Difference]: Without dead ends: 2819 [2022-11-19 08:33:32,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:32,114 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:32,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-11-19 08:33:32,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2022-11-19 08:33:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2819. [2022-11-19 08:33:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2771 states have (on average 4.1060988812703) internal successors, (11378), 2818 states have internal predecessors, (11378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 11378 transitions. [2022-11-19 08:33:32,162 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 11378 transitions. Word has length 27 [2022-11-19 08:33:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:32,163 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 11378 transitions. [2022-11-19 08:33:32,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 11378 transitions. [2022-11-19 08:33:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:32,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:32,163 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:32,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:32,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:32,364 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash -107094522, now seen corresponding path program 1 times [2022-11-19 08:33:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:32,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620069965] [2022-11-19 08:33:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:32,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:32,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:32,365 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:32,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-19 08:33:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:33:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:33,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:33,336 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:33:33,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:33:33,356 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 130 treesize of output 126 [2022-11-19 08:33:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:33,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:33,599 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:33,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:33,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:33,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620069965] [2022-11-19 08:33:33,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620069965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:33,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:33,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:33,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308018936] [2022-11-19 08:33:33,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:33,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:33,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:33,932 INFO L87 Difference]: Start difference. First operand 2819 states and 11378 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:34,149 INFO L93 Difference]: Finished difference Result 2812 states and 11344 transitions. [2022-11-19 08:33:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:34,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:34,156 INFO L225 Difference]: With dead ends: 2812 [2022-11-19 08:33:34,157 INFO L226 Difference]: Without dead ends: 2812 [2022-11-19 08:33:34,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:34,157 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:34,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-19 08:33:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2022-11-19 08:33:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 2812. [2022-11-19 08:33:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2764 states have (on average 4.104196816208393) internal successors, (11344), 2811 states have internal predecessors, (11344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 11344 transitions. [2022-11-19 08:33:34,205 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 11344 transitions. Word has length 27 [2022-11-19 08:33:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:34,205 INFO L495 AbstractCegarLoop]: Abstraction has 2812 states and 11344 transitions. [2022-11-19 08:33:34,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 11344 transitions. [2022-11-19 08:33:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:34,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:34,206 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:34,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:34,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:34,423 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:34,423 INFO L85 PathProgramCache]: Analyzing trace with hash -107115943, now seen corresponding path program 1 times [2022-11-19 08:33:34,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:34,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210532522] [2022-11-19 08:33:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:34,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:34,425 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:34,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-19 08:33:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:35,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:33:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:35,357 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:33:35,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:33:35,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:33:35,421 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:35,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:35,568 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:33:35,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:33:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:35,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:35,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210532522] [2022-11-19 08:33:35,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210532522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:35,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:35,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654404868] [2022-11-19 08:33:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:35,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:35,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:35,868 INFO L87 Difference]: Start difference. First operand 2812 states and 11344 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:36,120 INFO L93 Difference]: Finished difference Result 2805 states and 11310 transitions. [2022-11-19 08:33:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:33:36,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:36,129 INFO L225 Difference]: With dead ends: 2805 [2022-11-19 08:33:36,129 INFO L226 Difference]: Without dead ends: 2805 [2022-11-19 08:33:36,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:36,129 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:36,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-19 08:33:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-11-19 08:33:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2805. [2022-11-19 08:33:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2757 states have (on average 4.102285092491839) internal successors, (11310), 2804 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 11310 transitions. [2022-11-19 08:33:36,180 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 11310 transitions. Word has length 27 [2022-11-19 08:33:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:36,180 INFO L495 AbstractCegarLoop]: Abstraction has 2805 states and 11310 transitions. [2022-11-19 08:33:36,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 11310 transitions. [2022-11-19 08:33:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:36,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:36,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:36,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:36,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:36,382 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -107120717, now seen corresponding path program 1 times [2022-11-19 08:33:36,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:36,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798054667] [2022-11-19 08:33:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:36,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:36,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:36,385 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:36,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-19 08:33:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:37,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:33:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:37,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:37,331 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:33:37,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:33:37,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 174 [2022-11-19 08:33:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:37,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:37,583 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:37,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:37,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:37,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:37,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798054667] [2022-11-19 08:33:37,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798054667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:37,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:37,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:37,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652592541] [2022-11-19 08:33:37,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:37,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:37,916 INFO L87 Difference]: Start difference. First operand 2805 states and 11310 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:38,157 INFO L93 Difference]: Finished difference Result 2806 states and 11312 transitions. [2022-11-19 08:33:38,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:38,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:38,165 INFO L225 Difference]: With dead ends: 2806 [2022-11-19 08:33:38,165 INFO L226 Difference]: Without dead ends: 2806 [2022-11-19 08:33:38,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:38,165 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:38,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-11-19 08:33:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2022-11-19 08:33:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2806. [2022-11-19 08:33:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2758 states have (on average 4.101522842639594) internal successors, (11312), 2805 states have internal predecessors, (11312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 11312 transitions. [2022-11-19 08:33:38,214 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 11312 transitions. Word has length 27 [2022-11-19 08:33:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:38,214 INFO L495 AbstractCegarLoop]: Abstraction has 2806 states and 11312 transitions. [2022-11-19 08:33:38,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 11312 transitions. [2022-11-19 08:33:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:38,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:38,215 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:38,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:38,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:38,415 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:38,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash -107058221, now seen corresponding path program 1 times [2022-11-19 08:33:38,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:38,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654647836] [2022-11-19 08:33:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:38,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:38,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:38,418 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:38,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-19 08:33:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:39,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:33:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:39,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,315 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:33:39,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:33:39,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:33:39,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:39,515 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:39,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:39,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:39,850 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:39,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654647836] [2022-11-19 08:33:39,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654647836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:39,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:39,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:39,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618734117] [2022-11-19 08:33:39,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:39,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:39,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:39,851 INFO L87 Difference]: Start difference. First operand 2806 states and 11312 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:40,131 INFO L93 Difference]: Finished difference Result 2807 states and 11313 transitions. [2022-11-19 08:33:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:33:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:40,139 INFO L225 Difference]: With dead ends: 2807 [2022-11-19 08:33:40,140 INFO L226 Difference]: Without dead ends: 2807 [2022-11-19 08:33:40,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:33:40,140 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:40,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-11-19 08:33:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2022-11-19 08:33:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2807. [2022-11-19 08:33:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2759 states have (on average 4.100398695179413) internal successors, (11313), 2806 states have internal predecessors, (11313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 11313 transitions. [2022-11-19 08:33:40,190 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 11313 transitions. Word has length 27 [2022-11-19 08:33:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:40,191 INFO L495 AbstractCegarLoop]: Abstraction has 2807 states and 11313 transitions. [2022-11-19 08:33:40,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 11313 transitions. [2022-11-19 08:33:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:40,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:40,191 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:40,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:40,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:40,392 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:40,392 INFO L85 PathProgramCache]: Analyzing trace with hash -112332189, now seen corresponding path program 1 times [2022-11-19 08:33:40,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:40,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215223902] [2022-11-19 08:33:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:40,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:40,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:40,394 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:40,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-19 08:33:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:33:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:41,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,345 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:33:41,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:33:41,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:33:41,404 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:41,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:41,545 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:33:41,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:33:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:33:41,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:41,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215223902] [2022-11-19 08:33:41,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215223902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:41,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:41,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:41,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414013213] [2022-11-19 08:33:41,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:41,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:41,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:41,820 INFO L87 Difference]: Start difference. First operand 2807 states and 11313 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:42,024 INFO L93 Difference]: Finished difference Result 2806 states and 11311 transitions. [2022-11-19 08:33:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:33:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:42,032 INFO L225 Difference]: With dead ends: 2806 [2022-11-19 08:33:42,032 INFO L226 Difference]: Without dead ends: 2806 [2022-11-19 08:33:42,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:42,032 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:42,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-19 08:33:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2022-11-19 08:33:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2806. [2022-11-19 08:33:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2758 states have (on average 4.101160261058738) internal successors, (11311), 2805 states have internal predecessors, (11311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 11311 transitions. [2022-11-19 08:33:42,081 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 11311 transitions. Word has length 27 [2022-11-19 08:33:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:42,081 INFO L495 AbstractCegarLoop]: Abstraction has 2806 states and 11311 transitions. [2022-11-19 08:33:42,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 11311 transitions. [2022-11-19 08:33:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:42,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:42,082 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:42,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:42,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:42,283 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash 828413105, now seen corresponding path program 1 times [2022-11-19 08:33:42,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:42,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575214247] [2022-11-19 08:33:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:42,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:42,284 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:42,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-19 08:33:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:33:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:43,277 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:33:43,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:33:43,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:43,304 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 98 treesize of output 94 [2022-11-19 08:33:43,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:43,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:43,545 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:33:43,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:33:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:33:43,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:43,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:43,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575214247] [2022-11-19 08:33:43,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575214247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:43,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:43,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:33:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375965380] [2022-11-19 08:33:43,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:43,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:33:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:43,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:33:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:43,874 INFO L87 Difference]: Start difference. First operand 2806 states and 11311 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:44,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:44,052 INFO L93 Difference]: Finished difference Result 2805 states and 11309 transitions. [2022-11-19 08:33:44,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:33:44,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:44,060 INFO L225 Difference]: With dead ends: 2805 [2022-11-19 08:33:44,061 INFO L226 Difference]: Without dead ends: 2805 [2022-11-19 08:33:44,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:33:44,061 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:44,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-11-19 08:33:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-11-19 08:33:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2805. [2022-11-19 08:33:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2757 states have (on average 4.101922379397896) internal successors, (11309), 2804 states have internal predecessors, (11309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 11309 transitions. [2022-11-19 08:33:44,116 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 11309 transitions. Word has length 27 [2022-11-19 08:33:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:44,116 INFO L495 AbstractCegarLoop]: Abstraction has 2805 states and 11309 transitions. [2022-11-19 08:33:44,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 11309 transitions. [2022-11-19 08:33:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:44,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:44,118 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:44,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-19 08:33:44,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:44,329 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash 733755696, now seen corresponding path program 1 times [2022-11-19 08:33:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643282066] [2022-11-19 08:33:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:44,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:44,331 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:44,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-19 08:33:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:33:45,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:45,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:33:45,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:45,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:45,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:45,242 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:33:45,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:33:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:45,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:47,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643282066] [2022-11-19 08:33:47,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643282066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [32936207] [2022-11-19 08:33:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:33:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:33:47,928 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:33:47,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-19 08:33:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:33:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:49,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:49,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:33:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:50,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:50,064 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:33:50,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:33:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:50,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:50,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [32936207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:50,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942126929] [2022-11-19 08:33:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:50,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:50,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:50,546 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:50,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-19 08:33:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:51,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:33:51,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:51,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:51,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:51,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:33:51,366 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:33:51,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:33:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:33:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:51,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:33:51,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 65 [2022-11-19 08:33:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 5 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:33:54,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942126929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:54,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:33:54,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 11 [2022-11-19 08:33:54,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259466558] [2022-11-19 08:33:54,032 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:54,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:33:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:33:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:33:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2022-11-19 08:33:54,033 INFO L87 Difference]: Start difference. First operand 2805 states and 11309 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:55,458 INFO L93 Difference]: Finished difference Result 6233 states and 25051 transitions. [2022-11-19 08:33:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:33:55,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 08:33:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:55,479 INFO L225 Difference]: With dead ends: 6233 [2022-11-19 08:33:55,479 INFO L226 Difference]: Without dead ends: 6233 [2022-11-19 08:33:55,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=92, Invalid=179, Unknown=1, NotChecked=0, Total=272 [2022-11-19 08:33:55,479 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 336 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:55,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 0 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:33:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2022-11-19 08:33:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 3945. [2022-11-19 08:33:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3897 states have (on average 4.661791121375417) internal successors, (18167), 3944 states have internal predecessors, (18167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 18167 transitions. [2022-11-19 08:33:55,617 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 18167 transitions. Word has length 27 [2022-11-19 08:33:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:55,617 INFO L495 AbstractCegarLoop]: Abstraction has 3945 states and 18167 transitions. [2022-11-19 08:33:55,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:33:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 18167 transitions. [2022-11-19 08:33:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:33:55,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:55,618 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:55,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2022-11-19 08:33:55,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:56,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-19 08:33:56,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:56,237 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:33:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash 733755858, now seen corresponding path program 1 times [2022-11-19 08:33:56,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:33:56,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107115725] [2022-11-19 08:33:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:56,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:33:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:33:56,239 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:33:56,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-19 08:33:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:33:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:56,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:57,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:57,463 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:33:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107115725] [2022-11-19 08:33:57,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107115725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [203949707] [2022-11-19 08:33:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:57,463 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:33:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:33:57,464 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:33:57,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-19 08:33:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:58,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:33:58,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:58,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:58,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:59,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [203949707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:59,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220518126] [2022-11-19 08:33:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:59,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:59,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:59,096 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:59,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-19 08:33:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:59,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:33:59,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:59,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:33:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:33:59,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:00,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220518126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:00,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:34:00,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2022-11-19 08:34:00,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809050354] [2022-11-19 08:34:00,023 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:00,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:34:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:34:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:34:00,024 INFO L87 Difference]: Start difference. First operand 3945 states and 18167 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 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) [2022-11-19 08:34:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:01,512 INFO L93 Difference]: Finished difference Result 5473 states and 21619 transitions. [2022-11-19 08:34:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:34:01,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 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 27 [2022-11-19 08:34:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:01,529 INFO L225 Difference]: With dead ends: 5473 [2022-11-19 08:34:01,529 INFO L226 Difference]: Without dead ends: 5473 [2022-11-19 08:34:01,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:34:01,530 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 238 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:01,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:34:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2022-11-19 08:34:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 3945. [2022-11-19 08:34:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3897 states have (on average 4.369258403900436) internal successors, (17027), 3944 states have internal predecessors, (17027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 17027 transitions. [2022-11-19 08:34:01,643 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 17027 transitions. Word has length 27 [2022-11-19 08:34:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:01,644 INFO L495 AbstractCegarLoop]: Abstraction has 3945 states and 17027 transitions. [2022-11-19 08:34:01,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 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) [2022-11-19 08:34:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 17027 transitions. [2022-11-19 08:34:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:34:01,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:01,644 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:01,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:01,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-19 08:34:02,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2022-11-19 08:34:02,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:02,245 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash 974823417, now seen corresponding path program 1 times [2022-11-19 08:34:02,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:02,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863938892] [2022-11-19 08:34:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:02,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:02,247 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:02,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-19 08:34:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:34:03,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:03,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:03,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:03,221 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:03,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:03,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:03,285 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:03,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:03,427 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:34:03,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:34:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:03,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:03,762 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:03,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863938892] [2022-11-19 08:34:03,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863938892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:03,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:03,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:03,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013119322] [2022-11-19 08:34:03,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:03,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:03,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:03,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:03,764 INFO L87 Difference]: Start difference. First operand 3945 states and 17027 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:04,021 INFO L93 Difference]: Finished difference Result 3938 states and 17000 transitions. [2022-11-19 08:34:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:04,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 08:34:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:04,037 INFO L225 Difference]: With dead ends: 3938 [2022-11-19 08:34:04,037 INFO L226 Difference]: Without dead ends: 3938 [2022-11-19 08:34:04,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:04,038 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:04,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-19 08:34:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2022-11-19 08:34:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3938. [2022-11-19 08:34:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3890 states have (on average 4.370179948586118) internal successors, (17000), 3937 states have internal predecessors, (17000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 17000 transitions. [2022-11-19 08:34:04,132 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 17000 transitions. Word has length 28 [2022-11-19 08:34:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:04,133 INFO L495 AbstractCegarLoop]: Abstraction has 3938 states and 17000 transitions. [2022-11-19 08:34:04,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 17000 transitions. [2022-11-19 08:34:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:34:04,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:04,133 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:04,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:04,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:04,334 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:04,334 INFO L85 PathProgramCache]: Analyzing trace with hash 974823696, now seen corresponding path program 1 times [2022-11-19 08:34:04,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:04,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664620811] [2022-11-19 08:34:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:04,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:04,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:04,336 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:04,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-19 08:34:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:34:05,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:05,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:05,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:05,355 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:05,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:05,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:05,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:05,597 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:05,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:05,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:05,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664620811] [2022-11-19 08:34:05,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664620811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:05,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:05,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:05,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683266967] [2022-11-19 08:34:05,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:05,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:05,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:05,951 INFO L87 Difference]: Start difference. First operand 3938 states and 17000 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:06,159 INFO L93 Difference]: Finished difference Result 3931 states and 16973 transitions. [2022-11-19 08:34:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 08:34:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:06,172 INFO L225 Difference]: With dead ends: 3931 [2022-11-19 08:34:06,172 INFO L226 Difference]: Without dead ends: 3931 [2022-11-19 08:34:06,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:06,173 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:06,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-19 08:34:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2022-11-19 08:34:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3931. [2022-11-19 08:34:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3883 states have (on average 4.371104815864022) internal successors, (16973), 3930 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16973 transitions. [2022-11-19 08:34:06,248 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16973 transitions. Word has length 28 [2022-11-19 08:34:06,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:06,249 INFO L495 AbstractCegarLoop]: Abstraction has 3931 states and 16973 transitions. [2022-11-19 08:34:06,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16973 transitions. [2022-11-19 08:34:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:34:06,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:06,249 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:06,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:06,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:06,450 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash 974887122, now seen corresponding path program 1 times [2022-11-19 08:34:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:06,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946621022] [2022-11-19 08:34:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:06,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:06,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:06,452 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:06,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-19 08:34:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:34:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:07,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:07,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:07,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:07,503 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:07,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:07,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:07,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:07,705 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:07,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:08,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:08,063 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:08,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946621022] [2022-11-19 08:34:08,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946621022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:08,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:08,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:08,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238153306] [2022-11-19 08:34:08,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:08,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:08,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:08,064 INFO L87 Difference]: Start difference. First operand 3931 states and 16973 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:08,308 INFO L93 Difference]: Finished difference Result 3938 states and 16993 transitions. [2022-11-19 08:34:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 08:34:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:08,321 INFO L225 Difference]: With dead ends: 3938 [2022-11-19 08:34:08,321 INFO L226 Difference]: Without dead ends: 3938 [2022-11-19 08:34:08,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:08,321 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:08,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-19 08:34:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2022-11-19 08:34:08,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3938. [2022-11-19 08:34:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3890 states have (on average 4.368380462724936) internal successors, (16993), 3937 states have internal predecessors, (16993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 16993 transitions. [2022-11-19 08:34:08,432 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 16993 transitions. Word has length 28 [2022-11-19 08:34:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:08,432 INFO L495 AbstractCegarLoop]: Abstraction has 3938 states and 16993 transitions. [2022-11-19 08:34:08,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 16993 transitions. [2022-11-19 08:34:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:34:08,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:08,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:08,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:08,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:08,635 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash 975037751, now seen corresponding path program 1 times [2022-11-19 08:34:08,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:08,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758876257] [2022-11-19 08:34:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:08,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:08,637 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:08,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-19 08:34:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:34:09,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:09,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,714 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:09,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:09,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:09,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:09,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:09,972 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:09,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:34:10,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:10,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:10,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758876257] [2022-11-19 08:34:10,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758876257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:10,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:10,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:10,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082273572] [2022-11-19 08:34:10,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:10,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:10,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:10,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:10,363 INFO L87 Difference]: Start difference. First operand 3938 states and 16993 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:10,630 INFO L93 Difference]: Finished difference Result 3937 states and 16990 transitions. [2022-11-19 08:34:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:10,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 08:34:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:10,642 INFO L225 Difference]: With dead ends: 3937 [2022-11-19 08:34:10,642 INFO L226 Difference]: Without dead ends: 3937 [2022-11-19 08:34:10,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:10,643 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:10,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-19 08:34:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2022-11-19 08:34:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3937. [2022-11-19 08:34:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 3889 states have (on average 4.368732321933659) internal successors, (16990), 3936 states have internal predecessors, (16990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 16990 transitions. [2022-11-19 08:34:10,736 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 16990 transitions. Word has length 28 [2022-11-19 08:34:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:10,736 INFO L495 AbstractCegarLoop]: Abstraction has 3937 states and 16990 transitions. [2022-11-19 08:34:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 16990 transitions. [2022-11-19 08:34:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:34:10,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:10,737 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:10,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-19 08:34:10,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:10,938 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash 974373700, now seen corresponding path program 1 times [2022-11-19 08:34:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:10,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541226778] [2022-11-19 08:34:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:10,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:10,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:10,940 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:10,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-19 08:34:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:34:11,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:11,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:11,949 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:11,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:11,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:12,016 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:12,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:12,163 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:34:12,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:34:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:12,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:12,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:12,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541226778] [2022-11-19 08:34:12,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541226778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:12,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:12,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913111199] [2022-11-19 08:34:12,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:12,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:12,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:12,498 INFO L87 Difference]: Start difference. First operand 3937 states and 16990 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:12,763 INFO L93 Difference]: Finished difference Result 3944 states and 17010 transitions. [2022-11-19 08:34:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:12,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 08:34:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:12,774 INFO L225 Difference]: With dead ends: 3944 [2022-11-19 08:34:12,775 INFO L226 Difference]: Without dead ends: 3944 [2022-11-19 08:34:12,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:12,775 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:12,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-19 08:34:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2022-11-19 08:34:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 3944. [2022-11-19 08:34:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 3896 states have (on average 4.366016427104722) internal successors, (17010), 3943 states have internal predecessors, (17010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 17010 transitions. [2022-11-19 08:34:12,847 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 17010 transitions. Word has length 28 [2022-11-19 08:34:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:12,847 INFO L495 AbstractCegarLoop]: Abstraction has 3944 states and 17010 transitions. [2022-11-19 08:34:12,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:12,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 17010 transitions. [2022-11-19 08:34:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:34:12,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:12,848 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:12,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-19 08:34:13,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:13,050 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:13,050 INFO L85 PathProgramCache]: Analyzing trace with hash 974373731, now seen corresponding path program 1 times [2022-11-19 08:34:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:13,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028209174] [2022-11-19 08:34:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:13,052 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:13,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-19 08:34:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:34:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:13,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,070 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:14,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:14,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:14,139 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:14,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:14,319 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:34:14,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:34:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:34:14,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:14,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:14,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028209174] [2022-11-19 08:34:14,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028209174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:14,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:14,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:14,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55058883] [2022-11-19 08:34:14,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:14,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:14,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:14,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:14,626 INFO L87 Difference]: Start difference. First operand 3944 states and 17010 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:14,914 INFO L93 Difference]: Finished difference Result 3943 states and 17007 transitions. [2022-11-19 08:34:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 08:34:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:14,929 INFO L225 Difference]: With dead ends: 3943 [2022-11-19 08:34:14,930 INFO L226 Difference]: Without dead ends: 3943 [2022-11-19 08:34:14,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:14,930 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:14,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-19 08:34:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2022-11-19 08:34:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3943. [2022-11-19 08:34:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3895 states have (on average 4.366367137355584) internal successors, (17007), 3942 states have internal predecessors, (17007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 17007 transitions. [2022-11-19 08:34:15,024 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 17007 transitions. Word has length 28 [2022-11-19 08:34:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:15,025 INFO L495 AbstractCegarLoop]: Abstraction has 3943 states and 17007 transitions. [2022-11-19 08:34:15,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 17007 transitions. [2022-11-19 08:34:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:15,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:15,026 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:15,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-19 08:34:15,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:15,239 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash 154755523, now seen corresponding path program 1 times [2022-11-19 08:34:15,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:15,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868746843] [2022-11-19 08:34:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:15,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:15,240 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:15,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-19 08:34:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:34:16,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:16,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,328 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:34:16,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:34:16,345 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 250 treesize of output 242 [2022-11-19 08:34:16,453 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:16,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:16,632 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:34:16,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:34:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:34:17,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:17,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:17,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868746843] [2022-11-19 08:34:17,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868746843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:17,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:17,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:17,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532248558] [2022-11-19 08:34:17,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:17,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:17,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:17,036 INFO L87 Difference]: Start difference. First operand 3943 states and 17007 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:17,230 INFO L93 Difference]: Finished difference Result 3942 states and 17005 transitions. [2022-11-19 08:34:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:17,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 08:34:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:17,242 INFO L225 Difference]: With dead ends: 3942 [2022-11-19 08:34:17,242 INFO L226 Difference]: Without dead ends: 3942 [2022-11-19 08:34:17,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:17,242 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:17,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-19 08:34:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2022-11-19 08:34:17,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3942. [2022-11-19 08:34:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3894 states have (on average 4.366974833076528) internal successors, (17005), 3941 states have internal predecessors, (17005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 17005 transitions. [2022-11-19 08:34:17,316 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 17005 transitions. Word has length 29 [2022-11-19 08:34:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:17,316 INFO L495 AbstractCegarLoop]: Abstraction has 3942 states and 17005 transitions. [2022-11-19 08:34:17,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 17005 transitions. [2022-11-19 08:34:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:17,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:17,317 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:17,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:17,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:17,527 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:17,527 INFO L85 PathProgramCache]: Analyzing trace with hash 154760545, now seen corresponding path program 1 times [2022-11-19 08:34:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127604425] [2022-11-19 08:34:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:17,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:17,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:17,529 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:17,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-19 08:34:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:34:18,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:18,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:18,623 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:34:18,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:34:18,643 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 436 treesize of output 420 [2022-11-19 08:34:18,731 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:18,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:18,870 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:34:18,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:34:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:19,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:19,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127604425] [2022-11-19 08:34:19,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127604425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:19,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:19,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:19,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658008941] [2022-11-19 08:34:19,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:19,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:19,184 INFO L87 Difference]: Start difference. First operand 3942 states and 17005 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:19,390 INFO L93 Difference]: Finished difference Result 3893 states and 16774 transitions. [2022-11-19 08:34:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 08:34:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:19,402 INFO L225 Difference]: With dead ends: 3893 [2022-11-19 08:34:19,402 INFO L226 Difference]: Without dead ends: 3893 [2022-11-19 08:34:19,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:19,402 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:19,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:34:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2022-11-19 08:34:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3893. [2022-11-19 08:34:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3845 states have (on average 4.362548764629389) internal successors, (16774), 3892 states have internal predecessors, (16774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 16774 transitions. [2022-11-19 08:34:19,480 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 16774 transitions. Word has length 29 [2022-11-19 08:34:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:19,480 INFO L495 AbstractCegarLoop]: Abstraction has 3893 states and 16774 transitions. [2022-11-19 08:34:19,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 16774 transitions. [2022-11-19 08:34:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:19,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:19,482 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:19,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-19 08:34:19,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:19,683 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash 154764141, now seen corresponding path program 1 times [2022-11-19 08:34:19,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:19,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510977784] [2022-11-19 08:34:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:19,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:19,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:19,685 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:19,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-19 08:34:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:34:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:20,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:20,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:20,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:20,761 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:20,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:20,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:20,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 08:34:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:20,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:21,018 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:21,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:34:21,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:21,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:21,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510977784] [2022-11-19 08:34:21,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510977784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:21,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:21,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:21,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001333625] [2022-11-19 08:34:21,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:21,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:21,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:21,378 INFO L87 Difference]: Start difference. First operand 3893 states and 16774 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:21,547 INFO L93 Difference]: Finished difference Result 3892 states and 16772 transitions. [2022-11-19 08:34:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 08:34:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:21,559 INFO L225 Difference]: With dead ends: 3892 [2022-11-19 08:34:21,559 INFO L226 Difference]: Without dead ends: 3892 [2022-11-19 08:34:21,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:21,560 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:21,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-11-19 08:34:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2022-11-19 08:34:21,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3892. [2022-11-19 08:34:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3844 states have (on average 4.363163371488033) internal successors, (16772), 3891 states have internal predecessors, (16772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 16772 transitions. [2022-11-19 08:34:21,673 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 16772 transitions. Word has length 29 [2022-11-19 08:34:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:21,673 INFO L495 AbstractCegarLoop]: Abstraction has 3892 states and 16772 transitions. [2022-11-19 08:34:21,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 16772 transitions. [2022-11-19 08:34:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:21,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:21,675 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:21,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-19 08:34:21,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:21,875 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 156730347, now seen corresponding path program 1 times [2022-11-19 08:34:21,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:21,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977714250] [2022-11-19 08:34:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:21,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:21,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:21,877 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:21,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-19 08:34:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:34:22,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:22,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:22,961 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:34:22,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:34:22,984 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 130 treesize of output 126 [2022-11-19 08:34:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:23,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:23,191 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:23,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:34:23,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:23,552 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977714250] [2022-11-19 08:34:23,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977714250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:23,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:23,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:23,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830706066] [2022-11-19 08:34:23,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:23,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:23,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:23,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:23,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:23,553 INFO L87 Difference]: Start difference. First operand 3892 states and 16772 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:23,779 INFO L93 Difference]: Finished difference Result 3893 states and 16773 transitions. [2022-11-19 08:34:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 08:34:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:23,792 INFO L225 Difference]: With dead ends: 3893 [2022-11-19 08:34:23,792 INFO L226 Difference]: Without dead ends: 3893 [2022-11-19 08:34:23,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:23,792 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:23,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-19 08:34:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2022-11-19 08:34:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3892. [2022-11-19 08:34:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3844 states have (on average 4.363163371488033) internal successors, (16772), 3891 states have internal predecessors, (16772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 16772 transitions. [2022-11-19 08:34:23,928 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 16772 transitions. Word has length 29 [2022-11-19 08:34:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:23,928 INFO L495 AbstractCegarLoop]: Abstraction has 3892 states and 16772 transitions. [2022-11-19 08:34:23,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 16772 transitions. [2022-11-19 08:34:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:23,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:23,930 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:23,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-19 08:34:24,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:24,143 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash 140814296, now seen corresponding path program 1 times [2022-11-19 08:34:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274443001] [2022-11-19 08:34:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:24,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:24,145 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:24,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-19 08:34:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:25,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:34:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:25,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:25,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:25,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:25,219 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:25,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:25,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:25,292 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:25,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:25,448 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:34:25,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:34:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:34:25,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:25,792 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274443001] [2022-11-19 08:34:25,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274443001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:25,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:25,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:25,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800924253] [2022-11-19 08:34:25,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:25,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:25,794 INFO L87 Difference]: Start difference. First operand 3892 states and 16772 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:26,000 INFO L93 Difference]: Finished difference Result 3894 states and 16774 transitions. [2022-11-19 08:34:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:26,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 08:34:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:26,012 INFO L225 Difference]: With dead ends: 3894 [2022-11-19 08:34:26,012 INFO L226 Difference]: Without dead ends: 3894 [2022-11-19 08:34:26,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:26,012 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:26,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-19 08:34:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2022-11-19 08:34:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3892. [2022-11-19 08:34:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3844 states have (on average 4.363163371488033) internal successors, (16772), 3891 states have internal predecessors, (16772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 16772 transitions. [2022-11-19 08:34:26,086 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 16772 transitions. Word has length 29 [2022-11-19 08:34:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:26,086 INFO L495 AbstractCegarLoop]: Abstraction has 3892 states and 16772 transitions. [2022-11-19 08:34:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 16772 transitions. [2022-11-19 08:34:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:26,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:26,087 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:26,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:26,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:26,288 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1515003700, now seen corresponding path program 1 times [2022-11-19 08:34:26,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:26,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724293983] [2022-11-19 08:34:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:26,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:26,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:26,290 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:26,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-19 08:34:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:27,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:34:27,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:27,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:27,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724293983] [2022-11-19 08:34:27,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724293983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:27,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:27,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:27,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828472327] [2022-11-19 08:34:27,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:27,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:27,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:27,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:27,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:27,055 INFO L87 Difference]: Start difference. First operand 3892 states and 16772 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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) [2022-11-19 08:34:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:27,317 INFO L93 Difference]: Finished difference Result 3775 states and 16333 transitions. [2022-11-19 08:34:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:27,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 29 [2022-11-19 08:34:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:27,328 INFO L225 Difference]: With dead ends: 3775 [2022-11-19 08:34:27,329 INFO L226 Difference]: Without dead ends: 3775 [2022-11-19 08:34:27,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:27,329 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:27,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:34:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2022-11-19 08:34:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 3775. [2022-11-19 08:34:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 3736 states have (on average 4.371788008565311) internal successors, (16333), 3774 states have internal predecessors, (16333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 16333 transitions. [2022-11-19 08:34:27,403 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 16333 transitions. Word has length 29 [2022-11-19 08:34:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:27,403 INFO L495 AbstractCegarLoop]: Abstraction has 3775 states and 16333 transitions. [2022-11-19 08:34:27,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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) [2022-11-19 08:34:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 16333 transitions. [2022-11-19 08:34:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:34:27,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:27,405 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:27,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-19 08:34:27,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:27,605 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:27,605 INFO L85 PathProgramCache]: Analyzing trace with hash 502459607, now seen corresponding path program 1 times [2022-11-19 08:34:27,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:27,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242946116] [2022-11-19 08:34:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:27,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:27,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:27,607 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:27,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-19 08:34:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:28,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:34:28,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:28,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:28,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:28,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:28,740 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 08:34:28,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-19 08:34:28,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 08:34:28,806 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:28,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:28,946 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:34:28,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:34:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:34:29,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:29,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:29,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242946116] [2022-11-19 08:34:29,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242946116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:29,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:29,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:29,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004444937] [2022-11-19 08:34:29,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:29,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:29,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:29,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:29,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:29,267 INFO L87 Difference]: Start difference. First operand 3775 states and 16333 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:29,429 INFO L93 Difference]: Finished difference Result 3768 states and 16313 transitions. [2022-11-19 08:34:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:29,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-19 08:34:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:29,441 INFO L225 Difference]: With dead ends: 3768 [2022-11-19 08:34:29,441 INFO L226 Difference]: Without dead ends: 3768 [2022-11-19 08:34:29,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:29,441 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:29,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-19 08:34:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2022-11-19 08:34:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3768. [2022-11-19 08:34:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3768 states, 3729 states have (on average 4.374631268436578) internal successors, (16313), 3767 states have internal predecessors, (16313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3768 states to 3768 states and 16313 transitions. [2022-11-19 08:34:29,512 INFO L78 Accepts]: Start accepts. Automaton has 3768 states and 16313 transitions. Word has length 30 [2022-11-19 08:34:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:29,512 INFO L495 AbstractCegarLoop]: Abstraction has 3768 states and 16313 transitions. [2022-11-19 08:34:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3768 states and 16313 transitions. [2022-11-19 08:34:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:34:29,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:29,513 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:29,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:29,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:29,714 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash 502610236, now seen corresponding path program 1 times [2022-11-19 08:34:29,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:29,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607420323] [2022-11-19 08:34:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:29,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:29,716 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:29,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-19 08:34:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:30,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:34:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:30,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:30,861 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:34:30,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:34:30,880 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 510 treesize of output 494 [2022-11-19 08:34:30,965 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:30,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:34:31,113 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:34:31,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:34:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:34:31,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:31,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:31,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607420323] [2022-11-19 08:34:31,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607420323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:31,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:31,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:31,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653474693] [2022-11-19 08:34:31,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:31,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:31,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:31,436 INFO L87 Difference]: Start difference. First operand 3768 states and 16313 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:31,594 INFO L93 Difference]: Finished difference Result 3761 states and 16293 transitions. [2022-11-19 08:34:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:31,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-19 08:34:31,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:31,606 INFO L225 Difference]: With dead ends: 3761 [2022-11-19 08:34:31,606 INFO L226 Difference]: Without dead ends: 3761 [2022-11-19 08:34:31,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:31,607 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:31,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-19 08:34:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2022-11-19 08:34:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3761. [2022-11-19 08:34:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3761 states, 3722 states have (on average 4.377485222998388) internal successors, (16293), 3760 states have internal predecessors, (16293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3761 states to 3761 states and 16293 transitions. [2022-11-19 08:34:31,710 INFO L78 Accepts]: Start accepts. Automaton has 3761 states and 16293 transitions. Word has length 30 [2022-11-19 08:34:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:31,710 INFO L495 AbstractCegarLoop]: Abstraction has 3761 states and 16293 transitions. [2022-11-19 08:34:31,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3761 states and 16293 transitions. [2022-11-19 08:34:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:34:31,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:31,712 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:31,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:31,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:31,912 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:31,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:31,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2055568895, now seen corresponding path program 2 times [2022-11-19 08:34:31,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:31,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383466738] [2022-11-19 08:34:31,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:31,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:31,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:31,914 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:31,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-19 08:34:32,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:34:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:34:32,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:32,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:34:32,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:34:32,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:32,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:32,937 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:34:32,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:34:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:33,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:34,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:34,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383466738] [2022-11-19 08:34:34,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383466738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:34,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1255382829] [2022-11-19 08:34:34,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:34,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:34,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:34:34,173 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:34:34,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (112)] Waiting until timeout for monitored process [2022-11-19 08:34:35,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:34:35,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:34:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:35,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:34:35,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:34:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:35,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:35,915 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:34:35,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:34:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:36,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:36,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1255382829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:36,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618034377] [2022-11-19 08:34:36,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:36,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:36,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:36,454 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:36,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-19 08:34:37,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:34:37,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:34:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:37,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:34:37,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:34:37,440 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:34:37,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:37,462 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:34:37,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:34:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:38,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:44,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618034377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:44,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:34:44,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 30 [2022-11-19 08:34:44,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996054991] [2022-11-19 08:34:44,364 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:44,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 08:34:44,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:34:44,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 08:34:44,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:34:44,365 INFO L87 Difference]: Start difference. First operand 3761 states and 16293 transitions. Second operand has 31 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:52,559 INFO L93 Difference]: Finished difference Result 9286 states and 37090 transitions. [2022-11-19 08:34:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:34:52,561 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-19 08:34:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:52,595 INFO L225 Difference]: With dead ends: 9286 [2022-11-19 08:34:52,595 INFO L226 Difference]: Without dead ends: 9286 [2022-11-19 08:34:52,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=439, Invalid=1367, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:34:52,596 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:52,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 0 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1171 Invalid, 0 Unknown, 261 Unchecked, 4.8s Time] [2022-11-19 08:34:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2022-11-19 08:34:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 5596. [2022-11-19 08:34:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5567 states have (on average 4.654212322615412) internal successors, (25910), 5595 states have internal predecessors, (25910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 25910 transitions. [2022-11-19 08:34:52,784 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 25910 transitions. Word has length 30 [2022-11-19 08:34:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:52,785 INFO L495 AbstractCegarLoop]: Abstraction has 5596 states and 25910 transitions. [2022-11-19 08:34:52,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 25910 transitions. [2022-11-19 08:34:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:34:52,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:52,787 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:52,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-11-19 08:34:52,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Ended with exit code 0 [2022-11-19 08:34:53,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (112)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:53,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:53,388 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:34:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash -846765294, now seen corresponding path program 2 times [2022-11-19 08:34:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:34:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795847589] [2022-11-19 08:34:53,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:34:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:34:53,391 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:34:53,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-19 08:34:54,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:34:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:34:54,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:54,495 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:34:54,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:34:54,645 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:34:54,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:34:54,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:54,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:54,761 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:34:54,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:34:54,819 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:34:54,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:55,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:34:58,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:34:58,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795847589] [2022-11-19 08:34:58,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795847589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1494700962] [2022-11-19 08:34:58,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:34:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:34:58,486 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:34:58,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-19 08:35:00,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:35:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:35:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:00,268 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:35:00,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:35:00,431 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:35:00,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:35:00,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:00,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:00,560 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:35:00,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:35:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:00,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:00,686 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:35:00,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:35:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:00,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:04,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1494700962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:04,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918516641] [2022-11-19 08:35:04,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:35:04,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:04,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:04,679 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:04,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-19 08:35:05,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:35:05,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:05,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:35:05,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:05,701 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:35:05,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:35:05,854 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:35:05,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:35:05,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:05,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:05,958 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:35:05,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:35:06,007 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:35:06,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:06,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:12,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918516641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:12,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:35:12,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 7, 9] total 25 [2022-11-19 08:35:12,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401443532] [2022-11-19 08:35:12,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:12,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 08:35:12,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:12,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 08:35:12,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=569, Unknown=2, NotChecked=0, Total=702 [2022-11-19 08:35:12,004 INFO L87 Difference]: Start difference. First operand 5596 states and 25910 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:17,216 INFO L93 Difference]: Finished difference Result 20387 states and 88068 transitions. [2022-11-19 08:35:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:35:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-19 08:35:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:17,303 INFO L225 Difference]: With dead ends: 20387 [2022-11-19 08:35:17,303 INFO L226 Difference]: Without dead ends: 20387 [2022-11-19 08:35:17,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=390, Invalid=1090, Unknown=2, NotChecked=0, Total=1482 [2022-11-19 08:35:17,304 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1317 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:17,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1317 Valid, 0 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1006 Invalid, 0 Unknown, 4 Unchecked, 3.5s Time] [2022-11-19 08:35:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20387 states. [2022-11-19 08:35:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20387 to 10336. [2022-11-19 08:35:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10336 states, 10307 states have (on average 5.04016687687979) internal successors, (51949), 10335 states have internal predecessors, (51949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10336 states to 10336 states and 51949 transitions. [2022-11-19 08:35:17,742 INFO L78 Accepts]: Start accepts. Automaton has 10336 states and 51949 transitions. Word has length 30 [2022-11-19 08:35:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:17,743 INFO L495 AbstractCegarLoop]: Abstraction has 10336 states and 51949 transitions. [2022-11-19 08:35:17,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 10336 states and 51949 transitions. [2022-11-19 08:35:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:35:17,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:17,744 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:17,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-19 08:35:17,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (115)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:18,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:18,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:18,345 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:35:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash -846765222, now seen corresponding path program 2 times [2022-11-19 08:35:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049866134] [2022-11-19 08:35:18,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:35:18,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:18,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:18,347 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:18,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-19 08:35:19,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:35:19,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:19,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:35:19,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:19,216 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:35:19,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:35:19,370 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:35:19,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:35:19,480 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:35:19,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:19,524 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:35:19,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:35:19,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:19,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:35:19,759 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 08:35:19,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 08:35:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:35:20,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:20,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:20,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049866134] [2022-11-19 08:35:20,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049866134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:20,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:20,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:35:20,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830763044] [2022-11-19 08:35:20,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:20,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:35:20,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:20,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:35:20,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:35:20,367 INFO L87 Difference]: Start difference. First operand 10336 states and 51949 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:20,771 INFO L93 Difference]: Finished difference Result 10335 states and 51941 transitions. [2022-11-19 08:35:20,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:35:20,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-19 08:35:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:20,813 INFO L225 Difference]: With dead ends: 10335 [2022-11-19 08:35:20,813 INFO L226 Difference]: Without dead ends: 10335 [2022-11-19 08:35:20,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:35:20,813 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:20,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-11-19 08:35:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10335 states. [2022-11-19 08:35:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10335 to 10335. [2022-11-19 08:35:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10306 states have (on average 5.0398796817387925) internal successors, (51941), 10334 states have internal predecessors, (51941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 51941 transitions. [2022-11-19 08:35:21,143 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 51941 transitions. Word has length 30 [2022-11-19 08:35:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:21,143 INFO L495 AbstractCegarLoop]: Abstraction has 10335 states and 51941 transitions. [2022-11-19 08:35:21,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 51941 transitions. [2022-11-19 08:35:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 08:35:21,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:21,145 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:21,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:21,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:21,345 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:35:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:21,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1603620730, now seen corresponding path program 1 times [2022-11-19 08:35:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184506929] [2022-11-19 08:35:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:21,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:21,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:21,348 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:21,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-19 08:35:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:22,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:35:22,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:22,557 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 08:35:22,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 08:35:22,575 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 130 treesize of output 126 [2022-11-19 08:35:22,657 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:35:22,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 08:35:22,820 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-19 08:35:22,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2022-11-19 08:35:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 08:35:23,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:23,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:23,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184506929] [2022-11-19 08:35:23,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184506929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:23,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:23,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:35:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185478494] [2022-11-19 08:35:23,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:23,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:35:23,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:35:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:35:23,193 INFO L87 Difference]: Start difference. First operand 10335 states and 51941 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2022-11-19 08:35:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:23,418 INFO L93 Difference]: Finished difference Result 10334 states and 51940 transitions. [2022-11-19 08:35:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:35:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 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 31 [2022-11-19 08:35:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:23,459 INFO L225 Difference]: With dead ends: 10334 [2022-11-19 08:35:23,459 INFO L226 Difference]: Without dead ends: 10334 [2022-11-19 08:35:23,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:35:23,460 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:23,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-19 08:35:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2022-11-19 08:35:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10299. [2022-11-19 08:35:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10299 states, 10271 states have (on average 5.047804498101451) internal successors, (51846), 10298 states have internal predecessors, (51846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10299 states to 10299 states and 51846 transitions. [2022-11-19 08:35:23,948 INFO L78 Accepts]: Start accepts. Automaton has 10299 states and 51846 transitions. Word has length 31 [2022-11-19 08:35:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:23,948 INFO L495 AbstractCegarLoop]: Abstraction has 10299 states and 51846 transitions. [2022-11-19 08:35:23,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2022-11-19 08:35:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 10299 states and 51846 transitions. [2022-11-19 08:35:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 08:35:23,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:23,951 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:23,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:24,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:24,163 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:35:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1737805048, now seen corresponding path program 1 times [2022-11-19 08:35:24,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:24,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193769487] [2022-11-19 08:35:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:24,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:24,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:24,166 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:24,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-19 08:35:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:25,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:35:25,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:25,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:35:25,394 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:35:25,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:25,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:26,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193769487] [2022-11-19 08:35:26,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193769487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2123483344] [2022-11-19 08:35:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:26,754 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:26,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:26,755 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:26,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (120)] Waiting until timeout for monitored process [2022-11-19 08:35:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:35:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:29,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:35:29,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:35:29,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:29,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:29,953 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:35:29,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:35:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:30,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:32,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2123483344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594240582] [2022-11-19 08:35:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:32,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:32,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:32,226 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:32,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-19 08:35:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:33,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:35:33,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:33,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:35:33,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:33,207 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:35:33,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:35:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:35:33,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:34,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:35:34,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 87 [2022-11-19 08:35:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 5 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:35:37,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594240582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:37,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:35:37,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 23 [2022-11-19 08:35:37,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352552764] [2022-11-19 08:35:37,027 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:37,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:35:37,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:37,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:35:37,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=446, Unknown=1, NotChecked=0, Total=552 [2022-11-19 08:35:37,028 INFO L87 Difference]: Start difference. First operand 10299 states and 51846 transitions. Second operand has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:42,089 INFO L93 Difference]: Finished difference Result 19118 states and 82255 transitions. [2022-11-19 08:35:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:35:42,091 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-19 08:35:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:42,160 INFO L225 Difference]: With dead ends: 19118 [2022-11-19 08:35:42,160 INFO L226 Difference]: Without dead ends: 19118 [2022-11-19 08:35:42,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=171, Invalid=640, Unknown=1, NotChecked=0, Total=812 [2022-11-19 08:35:42,161 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 893 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:42,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 0 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1173 Invalid, 0 Unknown, 366 Unchecked, 3.7s Time] [2022-11-19 08:35:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19118 states. [2022-11-19 08:35:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19118 to 10299. [2022-11-19 08:35:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10299 states, 10271 states have (on average 4.856489144192387) internal successors, (49881), 10298 states have internal predecessors, (49881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10299 states to 10299 states and 49881 transitions. [2022-11-19 08:35:42,448 INFO L78 Accepts]: Start accepts. Automaton has 10299 states and 49881 transitions. Word has length 31 [2022-11-19 08:35:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:42,449 INFO L495 AbstractCegarLoop]: Abstraction has 10299 states and 49881 transitions. [2022-11-19 08:35:42,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10299 states and 49881 transitions. [2022-11-19 08:35:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:35:42,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:42,451 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:42,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:42,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (120)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:42,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:43,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:43,052 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:35:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:43,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1148783009, now seen corresponding path program 2 times [2022-11-19 08:35:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:43,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771362481] [2022-11-19 08:35:43,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:35:43,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:43,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:43,054 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:43,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-19 08:35:43,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:35:43,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:43,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:35:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:43,957 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:35:43,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:35:44,119 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:35:44,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:35:44,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:44,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:44,247 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:35:44,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:35:44,310 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:35:44,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:35:44,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:44,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:44,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771362481] [2022-11-19 08:35:44,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771362481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:44,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:44,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:35:44,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370134840] [2022-11-19 08:35:44,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:44,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:35:44,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:44,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:35:44,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:35:44,612 INFO L87 Difference]: Start difference. First operand 10299 states and 49881 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:44,998 INFO L93 Difference]: Finished difference Result 9496 states and 46253 transitions. [2022-11-19 08:35:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:35:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-19 08:35:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:45,035 INFO L225 Difference]: With dead ends: 9496 [2022-11-19 08:35:45,035 INFO L226 Difference]: Without dead ends: 9496 [2022-11-19 08:35:45,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:35:45,036 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:45,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:35:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9496 states. [2022-11-19 08:35:45,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9496 to 9496. [2022-11-19 08:35:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9496 states, 9477 states have (on average 4.880552917589955) internal successors, (46253), 9495 states have internal predecessors, (46253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9496 states to 9496 states and 46253 transitions. [2022-11-19 08:35:45,252 INFO L78 Accepts]: Start accepts. Automaton has 9496 states and 46253 transitions. Word has length 32 [2022-11-19 08:35:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:45,252 INFO L495 AbstractCegarLoop]: Abstraction has 9496 states and 46253 transitions. [2022-11-19 08:35:45,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9496 states and 46253 transitions. [2022-11-19 08:35:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:35:45,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:45,254 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:45,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Ended with exit code 0 [2022-11-19 08:35:45,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:45,455 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:35:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1148783084, now seen corresponding path program 2 times [2022-11-19 08:35:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:45,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751705369] [2022-11-19 08:35:45,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:35:45,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:45,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:45,457 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:45,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-19 08:35:46,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:35:46,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:46,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:35:46,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:46,672 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:35:46,672 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:35:46,832 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:35:46,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:35:46,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:46,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:46,948 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:35:46,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:35:47,012 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:35:47,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:47,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:50,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751705369] [2022-11-19 08:35:50,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751705369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135810427] [2022-11-19 08:35:50,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:35:50,918 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:50,919 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:50,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2022-11-19 08:35:52,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:35:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:35:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:52,790 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:35:52,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:35:52,947 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:35:52,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:35:53,067 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:35:53,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:35:53,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:53,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:53,207 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:35:53,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:35:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:53,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:57,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135810427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:57,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376318425] [2022-11-19 08:35:57,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:35:57,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:57,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:57,389 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:57,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-19 08:35:58,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:35:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:58,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 08:35:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:58,625 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:35:58,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:35:58,770 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:35:58,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:35:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:58,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:58,875 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:35:58,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:35:58,928 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:35:58,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:35:59,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:36:07,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376318425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:07,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:36:07,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 9, 10] total 38 [2022-11-19 08:36:07,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505704852] [2022-11-19 08:36:07,508 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:07,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 08:36:07,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 08:36:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1260, Unknown=2, NotChecked=0, Total=1560 [2022-11-19 08:36:07,510 INFO L87 Difference]: Start difference. First operand 9496 states and 46253 transitions. Second operand has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:16,961 INFO L93 Difference]: Finished difference Result 27096 states and 122789 transitions. [2022-11-19 08:36:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 08:36:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-19 08:36:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:17,109 INFO L225 Difference]: With dead ends: 27096 [2022-11-19 08:36:17,109 INFO L226 Difference]: Without dead ends: 27096 [2022-11-19 08:36:17,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=692, Invalid=2276, Unknown=2, NotChecked=0, Total=2970 [2022-11-19 08:36:17,110 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1788 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1788 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:17,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1788 Valid, 0 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1359 Invalid, 0 Unknown, 84 Unchecked, 5.7s Time] [2022-11-19 08:36:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27096 states. [2022-11-19 08:36:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27096 to 18856. [2022-11-19 08:36:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18856 states, 18837 states have (on average 4.976854063810586) internal successors, (93749), 18855 states have internal predecessors, (93749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18856 states to 18856 states and 93749 transitions. [2022-11-19 08:36:18,042 INFO L78 Accepts]: Start accepts. Automaton has 18856 states and 93749 transitions. Word has length 32 [2022-11-19 08:36:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:18,042 INFO L495 AbstractCegarLoop]: Abstraction has 18856 states and 93749 transitions. [2022-11-19 08:36:18,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 18856 states and 93749 transitions. [2022-11-19 08:36:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:36:18,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:18,045 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:18,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:18,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (124)] Ended with exit code 0 [2022-11-19 08:36:18,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:18,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:18,645 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:36:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1992509417, now seen corresponding path program 3 times [2022-11-19 08:36:18,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:18,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823619352] [2022-11-19 08:36:18,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:18,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:18,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:18,648 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:18,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-19 08:36:20,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:36:20,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:20,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:36:20,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:36:20,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:36:20,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:20,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823619352] [2022-11-19 08:36:20,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823619352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:20,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545169563] [2022-11-19 08:36:20,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:20,600 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:20,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:20,670 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:20,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2022-11-19 08:36:29,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:36:29,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:29,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:36:29,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:29,437 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:36:29,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:36:29,582 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:36:29,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:36:29,711 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:36:29,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:36:29,746 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:36:29,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:36:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:29,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:29,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:36:30,008 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 08:36:30,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 08:36:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:36:30,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:36:33,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1545169563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733459424] [2022-11-19 08:36:33,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:36:33,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:33,674 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:33,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-19 08:36:56,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:36:56,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:36:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:57,125 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:36:57,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:36:57,300 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:36:57,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:36:57,428 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 08:36:57,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:36:57,472 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:36:57,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:36:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:57,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:36:57,694 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 08:36:57,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 08:36:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:36:58,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:37:00,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733459424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:00,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:37:00,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 7, 9, 7] total 33 [2022-11-19 08:37:00,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329322856] [2022-11-19 08:37:00,248 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:37:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:37:00,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:37:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:37:00,249 INFO L87 Difference]: Start difference. First operand 18856 states and 93749 transitions. Second operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:05,026 INFO L93 Difference]: Finished difference Result 17330 states and 75725 transitions. [2022-11-19 08:37:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:37:05,028 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-19 08:37:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:05,093 INFO L225 Difference]: With dead ends: 17330 [2022-11-19 08:37:05,093 INFO L226 Difference]: Without dead ends: 17330 [2022-11-19 08:37:05,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 08:37:05,093 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:05,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 0 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-19 08:37:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17330 states. [2022-11-19 08:37:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17330 to 10135. [2022-11-19 08:37:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10135 states, 10128 states have (on average 4.785742496050553) internal successors, (48470), 10134 states have internal predecessors, (48470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10135 states to 10135 states and 48470 transitions. [2022-11-19 08:37:05,527 INFO L78 Accepts]: Start accepts. Automaton has 10135 states and 48470 transitions. Word has length 32 [2022-11-19 08:37:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:05,527 INFO L495 AbstractCegarLoop]: Abstraction has 10135 states and 48470 transitions. [2022-11-19 08:37:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10135 states and 48470 transitions. [2022-11-19 08:37:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:37:05,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:05,530 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:05,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (127)] Ended with exit code 0 [2022-11-19 08:37:05,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:05,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Ended with exit code 0 [2022-11-19 08:37:06,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:06,132 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:37:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1697041862, now seen corresponding path program 1 times [2022-11-19 08:37:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:06,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092736299] [2022-11-19 08:37:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:06,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:06,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:06,135 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:06,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-19 08:37:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:07,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:37:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:37:07,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:07,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:07,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092736299] [2022-11-19 08:37:07,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092736299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:07,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:07,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:37:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385040073] [2022-11-19 08:37:07,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:07,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:37:07,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:37:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:07,235 INFO L87 Difference]: Start difference. First operand 10135 states and 48470 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:07,545 INFO L93 Difference]: Finished difference Result 10108 states and 48402 transitions. [2022-11-19 08:37:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-19 08:37:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:07,584 INFO L225 Difference]: With dead ends: 10108 [2022-11-19 08:37:07,585 INFO L226 Difference]: Without dead ends: 10108 [2022-11-19 08:37:07,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:07,585 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:07,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:37:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10108 states. [2022-11-19 08:37:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10108 to 10108. [2022-11-19 08:37:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10108 states, 10104 states have (on average 4.790380047505939) internal successors, (48402), 10107 states have internal predecessors, (48402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10108 states to 10108 states and 48402 transitions. [2022-11-19 08:37:07,897 INFO L78 Accepts]: Start accepts. Automaton has 10108 states and 48402 transitions. Word has length 33 [2022-11-19 08:37:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:07,897 INFO L495 AbstractCegarLoop]: Abstraction has 10108 states and 48402 transitions. [2022-11-19 08:37:07,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 10108 states and 48402 transitions. [2022-11-19 08:37:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:37:07,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:07,902 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:07,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Ended with exit code 0 [2022-11-19 08:37:08,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:08,102 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:37:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1879776351, now seen corresponding path program 3 times [2022-11-19 08:37:08,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688409895] [2022-11-19 08:37:08,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:37:08,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:08,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:08,105 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:08,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-19 08:37:10,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:37:10,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:37:10,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:37:10,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:10,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:37:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:37:11,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:37:11,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:11,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688409895] [2022-11-19 08:37:11,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688409895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:11,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986117720] [2022-11-19 08:37:11,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:37:11,852 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:11,853 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:11,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (131)] Waiting until timeout for monitored process [2022-11-19 08:37:32,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:37:32,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:37:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:37:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:33,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:37:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:37:33,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:37:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [986117720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:33,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013441221] [2022-11-19 08:37:33,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:37:33,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:33,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:37:33,330 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:37:33,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-19 08:38:50,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:38:50,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:38:50,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:38:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:50,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:38:50,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:38:51,052 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:38:51,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 08:38:51,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:38:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:38:52,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:01,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013441221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:01,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:39:01,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 15, 14] total 44 [2022-11-19 08:39:01,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111059191] [2022-11-19 08:39:01,474 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:39:01,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 08:39:01,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:01,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 08:39:01,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1495, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:39:01,476 INFO L87 Difference]: Start difference. First operand 10108 states and 48402 transitions. Second operand has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:07,375 INFO L93 Difference]: Finished difference Result 9444 states and 38194 transitions. [2022-11-19 08:39:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:39:07,376 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-19 08:39:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:07,409 INFO L225 Difference]: With dead ends: 9444 [2022-11-19 08:39:07,409 INFO L226 Difference]: Without dead ends: 9444 [2022-11-19 08:39:07,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=588, Invalid=2064, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 08:39:07,410 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 637 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:07,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 0 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-19 08:39:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9444 states. [2022-11-19 08:39:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9444 to 6064. [2022-11-19 08:39:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6064 states, 6062 states have (on average 4.542065324975256) internal successors, (27534), 6063 states have internal predecessors, (27534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6064 states to 6064 states and 27534 transitions. [2022-11-19 08:39:07,577 INFO L78 Accepts]: Start accepts. Automaton has 6064 states and 27534 transitions. Word has length 36 [2022-11-19 08:39:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:07,577 INFO L495 AbstractCegarLoop]: Abstraction has 6064 states and 27534 transitions. [2022-11-19 08:39:07,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 6064 states and 27534 transitions. [2022-11-19 08:39:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:39:07,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:07,582 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:07,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:07,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-11-19 08:39:08,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (131)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:08,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:08,183 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:39:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1288903315, now seen corresponding path program 1 times [2022-11-19 08:39:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:08,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628693923] [2022-11-19 08:39:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:08,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:08,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:08,185 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:08,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-19 08:39:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:09,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:39:09,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:09,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:09,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:09,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628693923] [2022-11-19 08:39:09,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628693923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:09,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:09,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:39:09,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632133460] [2022-11-19 08:39:09,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:09,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:39:09,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:09,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:39:09,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:39:09,285 INFO L87 Difference]: Start difference. First operand 6064 states and 27534 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:09,976 INFO L93 Difference]: Finished difference Result 6900 states and 30412 transitions. [2022-11-19 08:39:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:39:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:39:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:10,022 INFO L225 Difference]: With dead ends: 6900 [2022-11-19 08:39:10,022 INFO L226 Difference]: Without dead ends: 6892 [2022-11-19 08:39:10,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:39:10,022 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:10,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:39:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6892 states. [2022-11-19 08:39:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6892 to 6204. [2022-11-19 08:39:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 6201 states have (on average 4.480728914691179) internal successors, (27785), 6203 states have internal predecessors, (27785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 27785 transitions. [2022-11-19 08:39:10,217 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 27785 transitions. Word has length 37 [2022-11-19 08:39:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:10,218 INFO L495 AbstractCegarLoop]: Abstraction has 6204 states and 27785 transitions. [2022-11-19 08:39:10,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 27785 transitions. [2022-11-19 08:39:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:39:10,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:10,225 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:10,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:10,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:10,440 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:39:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1572208503, now seen corresponding path program 2 times [2022-11-19 08:39:10,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:10,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623421910] [2022-11-19 08:39:10,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:39:10,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:10,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:10,442 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:10,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-19 08:39:11,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:39:11,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:11,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:39:11,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:11,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:11,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:11,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623421910] [2022-11-19 08:39:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623421910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:11,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:11,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:39:11,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666170885] [2022-11-19 08:39:11,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:11,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:39:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:39:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:39:11,468 INFO L87 Difference]: Start difference. First operand 6204 states and 27785 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:12,583 INFO L93 Difference]: Finished difference Result 6619 states and 29149 transitions. [2022-11-19 08:39:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:39:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:39:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:12,619 INFO L225 Difference]: With dead ends: 6619 [2022-11-19 08:39:12,619 INFO L226 Difference]: Without dead ends: 6502 [2022-11-19 08:39:12,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:39:12,620 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:12,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:39:12,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6502 states. [2022-11-19 08:39:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6502 to 6204. [2022-11-19 08:39:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 6201 states have (on average 4.472020641831962) internal successors, (27731), 6203 states have internal predecessors, (27731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 27731 transitions. [2022-11-19 08:39:12,915 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 27731 transitions. Word has length 37 [2022-11-19 08:39:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:12,915 INFO L495 AbstractCegarLoop]: Abstraction has 6204 states and 27731 transitions. [2022-11-19 08:39:12,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 27731 transitions. [2022-11-19 08:39:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:39:12,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:12,922 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:12,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:13,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:13,139 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:39:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1696937381, now seen corresponding path program 3 times [2022-11-19 08:39:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:13,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618622622] [2022-11-19 08:39:13,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:39:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:13,141 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:13,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-19 08:39:13,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:39:13,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:39:13,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:14,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:14,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:14,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618622622] [2022-11-19 08:39:14,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618622622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:14,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:14,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:39:14,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087630120] [2022-11-19 08:39:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:39:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:39:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:39:14,234 INFO L87 Difference]: Start difference. First operand 6204 states and 27731 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:15,284 INFO L93 Difference]: Finished difference Result 6408 states and 28394 transitions. [2022-11-19 08:39:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:39:15,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:39:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:15,311 INFO L225 Difference]: With dead ends: 6408 [2022-11-19 08:39:15,312 INFO L226 Difference]: Without dead ends: 6318 [2022-11-19 08:39:15,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:39:15,312 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:15,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:39:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2022-11-19 08:39:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 6262. [2022-11-19 08:39:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6262 states, 6259 states have (on average 4.464770730148586) internal successors, (27945), 6261 states have internal predecessors, (27945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6262 states to 6262 states and 27945 transitions. [2022-11-19 08:39:15,580 INFO L78 Accepts]: Start accepts. Automaton has 6262 states and 27945 transitions. Word has length 37 [2022-11-19 08:39:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:15,580 INFO L495 AbstractCegarLoop]: Abstraction has 6262 states and 27945 transitions. [2022-11-19 08:39:15,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6262 states and 27945 transitions. [2022-11-19 08:39:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:39:15,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:15,584 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:15,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-19 08:39:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:15,784 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:39:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 659748189, now seen corresponding path program 4 times [2022-11-19 08:39:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:15,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727854351] [2022-11-19 08:39:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:39:15,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:15,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:15,786 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:15,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-19 08:39:16,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:39:16,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:39:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:16,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:16,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727854351] [2022-11-19 08:39:16,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727854351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:16,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:16,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:39:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579464655] [2022-11-19 08:39:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:16,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:39:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:39:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:39:16,758 INFO L87 Difference]: Start difference. First operand 6262 states and 27945 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:17,378 INFO L93 Difference]: Finished difference Result 7300 states and 32043 transitions. [2022-11-19 08:39:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:39:17,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:39:17,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:17,410 INFO L225 Difference]: With dead ends: 7300 [2022-11-19 08:39:17,411 INFO L226 Difference]: Without dead ends: 7300 [2022-11-19 08:39:17,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:39:17,411 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:17,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:39:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7300 states. [2022-11-19 08:39:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7300 to 6602. [2022-11-19 08:39:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6602 states, 6599 states have (on average 4.465373541445674) internal successors, (29467), 6601 states have internal predecessors, (29467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6602 states to 6602 states and 29467 transitions. [2022-11-19 08:39:17,577 INFO L78 Accepts]: Start accepts. Automaton has 6602 states and 29467 transitions. Word has length 37 [2022-11-19 08:39:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:17,577 INFO L495 AbstractCegarLoop]: Abstraction has 6602 states and 29467 transitions. [2022-11-19 08:39:17,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6602 states and 29467 transitions. [2022-11-19 08:39:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:39:17,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:17,582 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:17,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:17,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:17,783 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:39:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:17,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1737973477, now seen corresponding path program 5 times [2022-11-19 08:39:17,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:17,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882330599] [2022-11-19 08:39:17,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 08:39:17,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:17,785 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:17,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-19 08:39:18,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-19 08:39:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:39:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:19,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:19,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882330599] [2022-11-19 08:39:19,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882330599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:19,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:19,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:39:19,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912895360] [2022-11-19 08:39:19,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:19,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:39:19,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:19,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:39:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:39:19,263 INFO L87 Difference]: Start difference. First operand 6602 states and 29467 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:20,509 INFO L93 Difference]: Finished difference Result 7578 states and 32411 transitions. [2022-11-19 08:39:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:39:20,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:39:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:20,536 INFO L225 Difference]: With dead ends: 7578 [2022-11-19 08:39:20,536 INFO L226 Difference]: Without dead ends: 7482 [2022-11-19 08:39:20,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:39:20,536 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:20,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:39:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7482 states. [2022-11-19 08:39:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7482 to 6572. [2022-11-19 08:39:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6572 states, 6569 states have (on average 4.459582889328665) internal successors, (29295), 6571 states have internal predecessors, (29295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 29295 transitions. [2022-11-19 08:39:20,702 INFO L78 Accepts]: Start accepts. Automaton has 6572 states and 29295 transitions. Word has length 37 [2022-11-19 08:39:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:20,703 INFO L495 AbstractCegarLoop]: Abstraction has 6572 states and 29295 transitions. [2022-11-19 08:39:20,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 6572 states and 29295 transitions. [2022-11-19 08:39:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:39:20,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:20,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:20,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-19 08:39:20,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:20,908 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:39:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1502897663, now seen corresponding path program 6 times [2022-11-19 08:39:20,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:20,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584902161] [2022-11-19 08:39:20,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 08:39:20,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:20,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:20,913 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:20,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-19 08:39:21,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-19 08:39:21,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:39:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:21,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:21,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:21,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584902161] [2022-11-19 08:39:21,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584902161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:21,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:21,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:39:21,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238742899] [2022-11-19 08:39:21,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:21,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:39:21,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:21,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:39:21,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:39:21,795 INFO L87 Difference]: Start difference. First operand 6572 states and 29295 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:22,401 INFO L93 Difference]: Finished difference Result 6910 states and 30468 transitions. [2022-11-19 08:39:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:39:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:39:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:22,425 INFO L225 Difference]: With dead ends: 6910 [2022-11-19 08:39:22,425 INFO L226 Difference]: Without dead ends: 6910 [2022-11-19 08:39:22,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:39:22,426 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:22,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:39:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6910 states. [2022-11-19 08:39:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6910 to 6234. [2022-11-19 08:39:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6234 states, 6231 states have (on average 4.404750441341679) internal successors, (27446), 6233 states have internal predecessors, (27446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 27446 transitions. [2022-11-19 08:39:22,586 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 27446 transitions. Word has length 37 [2022-11-19 08:39:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:22,586 INFO L495 AbstractCegarLoop]: Abstraction has 6234 states and 27446 transitions. [2022-11-19 08:39:22,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 27446 transitions. [2022-11-19 08:39:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:39:22,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:22,595 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:22,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:22,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:22,812 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:39:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1580770796, now seen corresponding path program 1 times [2022-11-19 08:39:22,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:22,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165530728] [2022-11-19 08:39:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:22,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:22,814 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:22,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-19 08:39:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:39:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:23,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:24,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165530728] [2022-11-19 08:39:24,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165530728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [646636911] [2022-11-19 08:39:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:24,122 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:24,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:39:24,123 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:39:24,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (140)] Waiting until timeout for monitored process [2022-11-19 08:39:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:39:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:26,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:26,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [646636911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343346979] [2022-11-19 08:39:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:26,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:39:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:39:26,283 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:39:26,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-11-19 08:39:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:39:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:27,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:39:27,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343346979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:27,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:39:27,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-11-19 08:39:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754286849] [2022-11-19 08:39:27,556 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:39:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:39:27,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:39:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:39:27,557 INFO L87 Difference]: Start difference. First operand 6234 states and 27446 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:28,995 INFO L93 Difference]: Finished difference Result 8757 states and 36374 transitions. [2022-11-19 08:39:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:39:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-19 08:39:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:29,024 INFO L225 Difference]: With dead ends: 8757 [2022-11-19 08:39:29,024 INFO L226 Difference]: Without dead ends: 8586 [2022-11-19 08:39:29,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:39:29,024 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 164 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:29,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 0 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:39:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8586 states. [2022-11-19 08:39:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8586 to 6984. [2022-11-19 08:39:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6984 states, 6981 states have (on average 4.267869932674402) internal successors, (29794), 6983 states have internal predecessors, (29794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 29794 transitions. [2022-11-19 08:39:29,198 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 29794 transitions. Word has length 39 [2022-11-19 08:39:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:29,199 INFO L495 AbstractCegarLoop]: Abstraction has 6984 states and 29794 transitions. [2022-11-19 08:39:29,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 29794 transitions. [2022-11-19 08:39:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 08:39:29,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:29,210 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:29,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (140)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:29,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:29,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-11-19 08:39:29,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:29,811 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:39:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash 821201728, now seen corresponding path program 3 times [2022-11-19 08:39:29,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:29,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983527435] [2022-11-19 08:39:29,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:39:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:29,814 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:29,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-19 08:39:33,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 08:39:33,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:39:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 52 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 08:39:33,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 52 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 08:39:33,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983527435] [2022-11-19 08:39:33,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983527435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1455873653] [2022-11-19 08:39:33,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:39:33,843 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:33,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:39:33,846 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:39:33,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (143)] Waiting until timeout for monitored process [2022-11-19 08:39:58,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 08:39:58,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:39:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:58,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:39:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 52 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 08:39:59,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:40:05,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1455873653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:40:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103553173] [2022-11-19 08:40:05,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:40:05,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:05,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:40:05,284 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:40:05,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-19 08:41:57,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 08:41:57,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:41:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 08:41:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:57,406 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:41:57,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 08:41:57,573 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:41:57,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-19 08:41:57,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:41:57,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:41:57,843 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:41:57,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:41:58,150 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 08:41:58,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-19 08:41:58,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:41:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:41:59,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:42:09,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103553173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:09,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:42:09,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 13, 15, 14] total 63 [2022-11-19 08:42:09,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264146509] [2022-11-19 08:42:09,433 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:42:09,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-19 08:42:09,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:09,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-19 08:42:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=3223, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 08:42:09,435 INFO L87 Difference]: Start difference. First operand 6984 states and 29794 transitions. Second operand has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 63 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:17,982 INFO L93 Difference]: Finished difference Result 5082 states and 19317 transitions. [2022-11-19 08:42:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:42:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 63 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-19 08:42:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:17,996 INFO L225 Difference]: With dead ends: 5082 [2022-11-19 08:42:17,996 INFO L226 Difference]: Without dead ends: 4598 [2022-11-19 08:42:17,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=927, Invalid=4185, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 08:42:17,997 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1211 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:17,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1211 Valid, 0 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2190 Invalid, 0 Unknown, 97 Unchecked, 7.2s Time] [2022-11-19 08:42:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4598 states. [2022-11-19 08:42:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4598 to 3344. [2022-11-19 08:42:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 4.087047562069997) internal successors, (13663), 3343 states have internal predecessors, (13663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 13663 transitions. [2022-11-19 08:42:18,138 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 13663 transitions. Word has length 44 [2022-11-19 08:42:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:18,138 INFO L495 AbstractCegarLoop]: Abstraction has 3344 states and 13663 transitions. [2022-11-19 08:42:18,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.238095238095238) internal successors, (141), 63 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 13663 transitions. [2022-11-19 08:42:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:42:18,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:18,146 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:18,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (143)] Ended with exit code 0 [2022-11-19 08:42:18,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:18,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Ended with exit code 0 [2022-11-19 08:42:18,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:18,746 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:18,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1238437829, now seen corresponding path program 2 times [2022-11-19 08:42:18,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:18,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018976126] [2022-11-19 08:42:18,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:42:18,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:18,749 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:18,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-19 08:42:19,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:42:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:19,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:42:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:19,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:19,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018976126] [2022-11-19 08:42:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018976126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:19,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:19,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:42:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706491332] [2022-11-19 08:42:19,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:19,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:42:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:42:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:42:19,687 INFO L87 Difference]: Start difference. First operand 3344 states and 13663 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 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) [2022-11-19 08:42:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:20,812 INFO L93 Difference]: Finished difference Result 3827 states and 15011 transitions. [2022-11-19 08:42:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:42:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 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 45 [2022-11-19 08:42:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:20,829 INFO L225 Difference]: With dead ends: 3827 [2022-11-19 08:42:20,829 INFO L226 Difference]: Without dead ends: 3740 [2022-11-19 08:42:20,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:42:20,830 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:20,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:42:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2022-11-19 08:42:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3344. [2022-11-19 08:42:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 4.078671851630272) internal successors, (13635), 3343 states have internal predecessors, (13635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 13635 transitions. [2022-11-19 08:42:20,901 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 13635 transitions. Word has length 45 [2022-11-19 08:42:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:20,902 INFO L495 AbstractCegarLoop]: Abstraction has 3344 states and 13635 transitions. [2022-11-19 08:42:20,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 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) [2022-11-19 08:42:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 13635 transitions. [2022-11-19 08:42:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:42:20,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:20,908 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:20,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Ended with exit code 0 [2022-11-19 08:42:21,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:21,109 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:21,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1421231642, now seen corresponding path program 1 times [2022-11-19 08:42:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:21,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598937519] [2022-11-19 08:42:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:21,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:21,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:21,111 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:21,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-19 08:42:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:42:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:22,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:22,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:22,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598937519] [2022-11-19 08:42:22,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598937519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:22,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:22,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:42:22,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313332787] [2022-11-19 08:42:22,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:22,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:42:22,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:22,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:42:22,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:42:22,425 INFO L87 Difference]: Start difference. First operand 3344 states and 13635 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:23,283 INFO L93 Difference]: Finished difference Result 3990 states and 15753 transitions. [2022-11-19 08:42:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:42:23,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-19 08:42:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:23,295 INFO L225 Difference]: With dead ends: 3990 [2022-11-19 08:42:23,295 INFO L226 Difference]: Without dead ends: 3990 [2022-11-19 08:42:23,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:42:23,296 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:23,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:42:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2022-11-19 08:42:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 3540. [2022-11-19 08:42:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 4.076292738061599) internal successors, (14426), 3539 states have internal predecessors, (14426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 14426 transitions. [2022-11-19 08:42:23,373 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 14426 transitions. Word has length 46 [2022-11-19 08:42:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:23,373 INFO L495 AbstractCegarLoop]: Abstraction has 3540 states and 14426 transitions. [2022-11-19 08:42:23,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 14426 transitions. [2022-11-19 08:42:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:42:23,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:23,381 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:23,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Ended with exit code 0 [2022-11-19 08:42:23,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:23,581 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash 581980430, now seen corresponding path program 2 times [2022-11-19 08:42:23,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:23,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639958843] [2022-11-19 08:42:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:42:23,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:23,583 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:23,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-19 08:42:24,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:42:24,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:24,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:42:24,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:24,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:25,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:25,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639958843] [2022-11-19 08:42:25,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639958843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:25,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [542991476] [2022-11-19 08:42:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:42:25,218 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:42:25,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:42:25,219 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:42:25,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (148)] Waiting until timeout for monitored process [2022-11-19 08:42:27,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:42:27,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:42:27,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:27,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:27,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [542991476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:27,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:42:27,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 16 [2022-11-19 08:42:27,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694885898] [2022-11-19 08:42:27,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:27,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:42:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:42:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:42:27,246 INFO L87 Difference]: Start difference. First operand 3540 states and 14426 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:27,954 INFO L93 Difference]: Finished difference Result 3808 states and 15193 transitions. [2022-11-19 08:42:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:42:27,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-19 08:42:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:27,963 INFO L225 Difference]: With dead ends: 3808 [2022-11-19 08:42:27,964 INFO L226 Difference]: Without dead ends: 3778 [2022-11-19 08:42:27,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:42:27,964 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:27,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:42:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2022-11-19 08:42:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3540. [2022-11-19 08:42:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 4.068380898558915) internal successors, (14398), 3539 states have internal predecessors, (14398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 14398 transitions. [2022-11-19 08:42:28,030 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 14398 transitions. Word has length 46 [2022-11-19 08:42:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:28,030 INFO L495 AbstractCegarLoop]: Abstraction has 3540 states and 14398 transitions. [2022-11-19 08:42:28,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 14398 transitions. [2022-11-19 08:42:28,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:42:28,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:28,038 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:28,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (148)] Ended with exit code 0 [2022-11-19 08:42:28,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Ended with exit code 0 [2022-11-19 08:42:28,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:28,439 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash -638853594, now seen corresponding path program 3 times [2022-11-19 08:42:28,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:28,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778801633] [2022-11-19 08:42:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:42:28,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:28,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:28,441 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:28,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-19 08:42:29,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:42:29,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:29,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:42:29,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:29,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:29,463 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778801633] [2022-11-19 08:42:29,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778801633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:29,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:29,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:42:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244269321] [2022-11-19 08:42:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:42:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:42:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:42:29,464 INFO L87 Difference]: Start difference. First operand 3540 states and 14398 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:30,283 INFO L93 Difference]: Finished difference Result 4426 states and 17301 transitions. [2022-11-19 08:42:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:42:30,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-19 08:42:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:30,294 INFO L225 Difference]: With dead ends: 4426 [2022-11-19 08:42:30,295 INFO L226 Difference]: Without dead ends: 4426 [2022-11-19 08:42:30,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:42:30,295 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:30,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:42:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2022-11-19 08:42:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3540. [2022-11-19 08:42:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 4.068380898558915) internal successors, (14398), 3539 states have internal predecessors, (14398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 14398 transitions. [2022-11-19 08:42:30,370 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 14398 transitions. Word has length 46 [2022-11-19 08:42:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:30,370 INFO L495 AbstractCegarLoop]: Abstraction has 3540 states and 14398 transitions. [2022-11-19 08:42:30,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 14398 transitions. [2022-11-19 08:42:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:42:30,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:30,377 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:30,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:30,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:30,578 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1478104806, now seen corresponding path program 4 times [2022-11-19 08:42:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:30,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087323932] [2022-11-19 08:42:30,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:42:30,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:30,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:30,580 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:30,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-19 08:42:31,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:42:31,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:42:31,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:31,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:31,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:31,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087323932] [2022-11-19 08:42:31,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087323932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:31,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:31,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:42:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883510672] [2022-11-19 08:42:31,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:31,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:42:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:42:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:42:31,758 INFO L87 Difference]: Start difference. First operand 3540 states and 14398 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:32,489 INFO L93 Difference]: Finished difference Result 3908 states and 15409 transitions. [2022-11-19 08:42:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:42:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-19 08:42:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:32,500 INFO L225 Difference]: With dead ends: 3908 [2022-11-19 08:42:32,501 INFO L226 Difference]: Without dead ends: 3878 [2022-11-19 08:42:32,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:42:32,501 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:32,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:42:32,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2022-11-19 08:42:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3482. [2022-11-19 08:42:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 3481 states have (on average 4.0792875610456765) internal successors, (14200), 3481 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 14200 transitions. [2022-11-19 08:42:32,577 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 14200 transitions. Word has length 46 [2022-11-19 08:42:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:32,577 INFO L495 AbstractCegarLoop]: Abstraction has 3482 states and 14200 transitions. [2022-11-19 08:42:32,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 14200 transitions. [2022-11-19 08:42:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:42:32,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:32,583 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:32,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:32,786 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1678500508, now seen corresponding path program 5 times [2022-11-19 08:42:32,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:32,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542615617] [2022-11-19 08:42:32,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 08:42:32,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:32,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:32,788 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:32,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-19 08:42:34,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-19 08:42:34,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:42:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:34,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:34,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:34,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542615617] [2022-11-19 08:42:34,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542615617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:34,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:34,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:42:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383962951] [2022-11-19 08:42:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:34,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:42:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:42:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:42:34,378 INFO L87 Difference]: Start difference. First operand 3482 states and 14200 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:35,155 INFO L93 Difference]: Finished difference Result 3962 states and 15545 transitions. [2022-11-19 08:42:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:42:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-19 08:42:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:35,167 INFO L225 Difference]: With dead ends: 3962 [2022-11-19 08:42:35,167 INFO L226 Difference]: Without dead ends: 3962 [2022-11-19 08:42:35,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:42:35,168 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:35,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:42:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2022-11-19 08:42:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 3314. [2022-11-19 08:42:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3314 states, 3313 states have (on average 4.034409900392394) internal successors, (13366), 3313 states have internal predecessors, (13366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3314 states to 3314 states and 13366 transitions. [2022-11-19 08:42:35,242 INFO L78 Accepts]: Start accepts. Automaton has 3314 states and 13366 transitions. Word has length 46 [2022-11-19 08:42:35,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:35,242 INFO L495 AbstractCegarLoop]: Abstraction has 3314 states and 13366 transitions. [2022-11-19 08:42:35,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states and 13366 transitions. [2022-11-19 08:42:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:42:35,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:35,250 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:35,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:35,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:35,463 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash 270545965, now seen corresponding path program 1 times [2022-11-19 08:42:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534912626] [2022-11-19 08:42:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:35,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:35,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:35,465 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:35,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-19 08:42:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:36,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:42:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:36,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:36,726 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:36,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534912626] [2022-11-19 08:42:36,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534912626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:36,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:36,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:42:36,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444210553] [2022-11-19 08:42:36,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:36,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:42:36,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:36,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:42:36,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:42:36,728 INFO L87 Difference]: Start difference. First operand 3314 states and 13366 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:37,593 INFO L93 Difference]: Finished difference Result 3624 states and 14521 transitions. [2022-11-19 08:42:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:42:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-19 08:42:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:37,603 INFO L225 Difference]: With dead ends: 3624 [2022-11-19 08:42:37,603 INFO L226 Difference]: Without dead ends: 3624 [2022-11-19 08:42:37,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:42:37,604 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:37,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:42:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2022-11-19 08:42:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 3624. [2022-11-19 08:42:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.008004416229644) internal successors, (14521), 3623 states have internal predecessors, (14521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 14521 transitions. [2022-11-19 08:42:37,676 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 14521 transitions. Word has length 47 [2022-11-19 08:42:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:37,676 INFO L495 AbstractCegarLoop]: Abstraction has 3624 states and 14521 transitions. [2022-11-19 08:42:37,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 14521 transitions. [2022-11-19 08:42:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:42:37,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:37,684 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:37,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-19 08:42:37,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:37,885 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash 127502713, now seen corresponding path program 2 times [2022-11-19 08:42:37,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:37,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879158683] [2022-11-19 08:42:37,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:42:37,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:37,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:37,887 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:37,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-19 08:42:39,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:42:39,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:42:39,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:39,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:39,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:39,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879158683] [2022-11-19 08:42:39,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879158683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:39,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1924592993] [2022-11-19 08:42:39,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:42:39,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:42:39,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:42:39,669 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:42:39,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (154)] Waiting until timeout for monitored process [2022-11-19 08:42:42,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:42:42,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:42,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:42:42,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:42,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:42,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1924592993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:42,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:42:42,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 16 [2022-11-19 08:42:42,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135558060] [2022-11-19 08:42:42,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:42,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:42:42,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:42,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:42:42,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:42:42,292 INFO L87 Difference]: Start difference. First operand 3624 states and 14521 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:43,305 INFO L93 Difference]: Finished difference Result 3962 states and 15773 transitions. [2022-11-19 08:42:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:42:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-19 08:42:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:43,317 INFO L225 Difference]: With dead ends: 3962 [2022-11-19 08:42:43,317 INFO L226 Difference]: Without dead ends: 3962 [2022-11-19 08:42:43,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:42:43,318 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:43,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:42:43,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2022-11-19 08:42:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 3652. [2022-11-19 08:42:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 4.0038345658723635) internal successors, (14618), 3651 states have internal predecessors, (14618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 14618 transitions. [2022-11-19 08:42:43,392 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 14618 transitions. Word has length 47 [2022-11-19 08:42:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:43,392 INFO L495 AbstractCegarLoop]: Abstraction has 3652 states and 14618 transitions. [2022-11-19 08:42:43,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 14618 transitions. [2022-11-19 08:42:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:42:43,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:43,400 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:43,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (154)] Ended with exit code 0 [2022-11-19 08:42:43,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Ended with exit code 0 [2022-11-19 08:42:43,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:43,800 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:43,801 INFO L85 PathProgramCache]: Analyzing trace with hash 689369837, now seen corresponding path program 3 times [2022-11-19 08:42:43,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:43,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280935154] [2022-11-19 08:42:43,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:42:43,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:43,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:43,804 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:43,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-19 08:42:44,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:42:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:45,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:42:45,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:42:45,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:45,063 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:45,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280935154] [2022-11-19 08:42:45,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280935154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:45,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:45,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:42:45,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243599365] [2022-11-19 08:42:45,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:45,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:42:45,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:42:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:42:45,064 INFO L87 Difference]: Start difference. First operand 3652 states and 14618 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:45,871 INFO L93 Difference]: Finished difference Result 3652 states and 14308 transitions. [2022-11-19 08:42:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:42:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-19 08:42:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:45,882 INFO L225 Difference]: With dead ends: 3652 [2022-11-19 08:42:45,882 INFO L226 Difference]: Without dead ends: 3652 [2022-11-19 08:42:45,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:42:45,883 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:45,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:42:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2022-11-19 08:42:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 3314. [2022-11-19 08:42:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3314 states, 3313 states have (on average 3.940839118623604) internal successors, (13056), 3313 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3314 states to 3314 states and 13056 transitions. [2022-11-19 08:42:45,956 INFO L78 Accepts]: Start accepts. Automaton has 3314 states and 13056 transitions. Word has length 47 [2022-11-19 08:42:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:45,956 INFO L495 AbstractCegarLoop]: Abstraction has 3314 states and 13056 transitions. [2022-11-19 08:42:45,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states and 13056 transitions. [2022-11-19 08:42:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 08:42:45,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:45,967 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:45,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:46,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:46,186 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-19 08:42:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:46,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1646866728, now seen corresponding path program 1 times [2022-11-19 08:42:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:46,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547663227] [2022-11-19 08:42:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:46,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:46,188 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:46,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-19 08:42:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:47,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:42:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:47,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:47,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:47,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547663227] [2022-11-19 08:42:47,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547663227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:47,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1664702906] [2022-11-19 08:42:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:47,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:42:47,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:42:47,916 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:42:47,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (157)] Waiting until timeout for monitored process [2022-11-19 08:42:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:50,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:42:50,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:50,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:50,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1664702906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:50,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793394578] [2022-11-19 08:42:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:50,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:42:50,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:42:50,694 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:42:50,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b4ca89f-6f1c-4caa-b829-0cc7171ebc73/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-11-19 08:42:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:42:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:52,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:42:52,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793394578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:52,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:42:52,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2022-11-19 08:42:52,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094528481] [2022-11-19 08:42:52,192 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:42:52,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:42:52,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:42:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:42:52,193 INFO L87 Difference]: Start difference. First operand 3314 states and 13056 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)