./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.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_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/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_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/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_848cd999-a73d-4c2b-a060-e63e805d439f/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 e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d --- 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 06:55:57,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:55:57,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:55:57,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:55:57,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:55:57,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:55:57,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:55:57,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:55:57,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:55:57,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:55:57,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:55:57,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:55:57,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:55:57,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:55:57,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:55:57,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:55:57,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:55:57,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:55:57,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:55:57,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:55:57,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:55:57,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:55:57,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:55:57,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:55:57,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:55:57,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:55:57,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:55:57,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:55:57,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:55:57,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:55:57,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:55:57,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:55:57,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:55:57,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:55:57,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:55:57,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:55:57,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:55:57,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:55:57,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:55:57,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:55:57,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:55:57,155 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 06:55:57,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:55:57,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:55:57,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:55:57,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:55:57,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:55:57,198 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:55:57,198 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:55:57,199 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:55:57,199 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:55:57,199 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:55:57,200 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:55:57,201 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:55:57,201 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:55:57,201 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:55:57,201 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:55:57,202 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:55:57,202 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:55:57,202 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:55:57,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:55:57,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:55:57,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:55:57,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:55:57,205 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:55:57,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:55:57,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:55:57,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:55:57,207 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:55:57,207 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:55:57,207 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:55:57,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:55:57,208 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:55:57,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:55:57,209 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:55:57,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:55:57,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:55:57,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:55:57,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:55:57,210 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:55:57,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:55:57,211 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:55:57,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:55:57,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:55:57,211 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_848cd999-a73d-4c2b-a060-e63e805d439f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d [2022-11-19 06:55:57,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:55:57,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:55:57,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:55:57,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:55:57,601 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:55:57,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2022-11-19 06:55:57,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data/7abf5f278/0042d11a8900405c97604151d8237bbc/FLAG4a8e4f758 [2022-11-19 06:55:58,191 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:55:58,192 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2022-11-19 06:55:58,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data/7abf5f278/0042d11a8900405c97604151d8237bbc/FLAG4a8e4f758 [2022-11-19 06:55:58,561 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data/7abf5f278/0042d11a8900405c97604151d8237bbc [2022-11-19 06:55:58,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:55:58,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:55:58,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:55:58,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:55:58,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:55:58,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:55:58" (1/1) ... [2022-11-19 06:55:58,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f393404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:58, skipping insertion in model container [2022-11-19 06:55:58,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:55:58" (1/1) ... [2022-11-19 06:55:58,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:55:58,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:55:58,853 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_848cd999-a73d-4c2b-a060-e63e805d439f/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2022-11-19 06:55:58,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:55:58,875 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 06:55:58,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5277b8f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:58, skipping insertion in model container [2022-11-19 06:55:58,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:55:58,877 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 06:55:58,878 INFO L158 Benchmark]: Toolchain (without parser) took 310.37ms. Allocated memory is still 115.3MB. Free memory was 76.9MB in the beginning and 88.9MB in the end (delta: -12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:55:58,879 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 115.3MB. Free memory is still 93.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:55:58,880 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.16ms. Allocated memory is still 115.3MB. Free memory was 76.7MB in the beginning and 88.9MB in the end (delta: -12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:55:58,881 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 115.3MB. Free memory is still 93.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.16ms. Allocated memory is still 115.3MB. Free memory was 76.7MB in the beginning and 88.9MB in the end (delta: -12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/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_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/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_848cd999-a73d-4c2b-a060-e63e805d439f/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 e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d --- 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 06:56:00,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:56:00,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:56:00,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:56:00,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:56:00,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:56:00,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:56:00,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:56:00,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:56:00,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:56:00,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:56:01,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:56:01,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:56:01,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:56:01,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:56:01,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:56:01,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:56:01,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:56:01,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:56:01,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:56:01,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:56:01,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:56:01,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:56:01,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:56:01,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:56:01,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:56:01,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:56:01,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:56:01,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:56:01,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:56:01,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:56:01,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:56:01,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:56:01,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:56:01,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:56:01,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:56:01,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:56:01,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:56:01,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:56:01,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:56:01,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:56:01,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 06:56:01,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:56:01,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:56:01,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:56:01,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:56:01,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:56:01,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:56:01,109 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:56:01,110 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:56:01,110 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:56:01,110 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:56:01,111 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:56:01,111 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:56:01,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:56:01,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:56:01,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:56:01,114 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:56:01,114 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:56:01,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:56:01,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:56:01,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:56:01,115 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:56:01,115 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:56:01,115 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:56:01,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:56:01,116 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:56:01,117 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 06:56:01,117 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 06:56:01,117 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:56:01,117 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:56:01,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:56:01,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 06:56:01,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:56:01,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:56:01,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:56:01,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:56:01,120 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 06:56:01,120 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:01,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:56:01,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 06:56:01,121 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_848cd999-a73d-4c2b-a060-e63e805d439f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e280ea7002eb926faba3195da50aa743246f3289123bb9a1b445dc9aaf8e8f3d [2022-11-19 06:56:01,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:56:01,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:56:01,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:56:01,547 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:56:01,548 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:56:01,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2022-11-19 06:56:01,609 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data/c7dee9714/a51f79d69fe14432ba7c655ad1f60e8d/FLAG1044cf899 [2022-11-19 06:56:02,044 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:56:02,044 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c [2022-11-19 06:56:02,051 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data/c7dee9714/a51f79d69fe14432ba7c655ad1f60e8d/FLAG1044cf899 [2022-11-19 06:56:02,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/data/c7dee9714/a51f79d69fe14432ba7c655ad1f60e8d [2022-11-19 06:56:02,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:56:02,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:56:02,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:56:02,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:56:02,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:56:02,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:02,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c92421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02, skipping insertion in model container [2022-11-19 06:56:02,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:02,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:56:02,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:56:02,663 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_848cd999-a73d-4c2b-a060-e63e805d439f/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2022-11-19 06:56:02,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:56:02,748 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 06:56:02,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:56:02,795 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_848cd999-a73d-4c2b-a060-e63e805d439f/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2022-11-19 06:56:02,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:56:02,822 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:56:02,864 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_848cd999-a73d-4c2b-a060-e63e805d439f/sv-benchmarks/c/weaver/popl20-bad-dot-product-alt.wvr.c[3182,3195] [2022-11-19 06:56:02,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:56:02,905 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:56:02,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02 WrapperNode [2022-11-19 06:56:02,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:56:02,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:56:02,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:56:02,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:56:02,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:02,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:02,992 INFO L138 Inliner]: procedures = 30, calls = 74, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 352 [2022-11-19 06:56:02,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:56:02,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:56:02,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:56:02,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:56:03,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,029 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:56:03,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:56:03,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:56:03,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:56:03,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (1/1) ... [2022-11-19 06:56:03,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:56:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:03,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:56:03,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:56:03,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:56:03,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 06:56:03,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:56:03,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:56:03,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 06:56:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:56:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 06:56:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 06:56:03,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 06:56:03,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 06:56:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 06:56:03,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 06:56:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 06:56:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 06:56:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:56:03,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:56:03,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:56:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:56:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 06:56:03,122 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 06:56:03,343 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:56:03,345 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:56:04,600 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:56:04,937 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:56:04,937 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-19 06:56:04,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:56:04 BoogieIcfgContainer [2022-11-19 06:56:04,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:56:04,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:56:04,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:56:04,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:56:04,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:56:02" (1/3) ... [2022-11-19 06:56:04,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35afcea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:56:04, skipping insertion in model container [2022-11-19 06:56:04,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:02" (2/3) ... [2022-11-19 06:56:04,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35afcea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:56:04, skipping insertion in model container [2022-11-19 06:56:04,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:56:04" (3/3) ... [2022-11-19 06:56:04,959 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product-alt.wvr.c [2022-11-19 06:56:04,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:56:04,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2022-11-19 06:56:04,977 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 06:56:05,231 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 06:56:05,285 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 06:56:05,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 392 places, 417 transitions, 858 flow [2022-11-19 06:56:05,315 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 392 places, 417 transitions, 858 flow [2022-11-19 06:56:05,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 417 transitions, 858 flow [2022-11-19 06:56:05,553 INFO L130 PetriNetUnfolder]: 35/414 cut-off events. [2022-11-19 06:56:05,553 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-19 06:56:05,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 414 events. 35/414 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1106 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 320. Up to 2 conditions per place. [2022-11-19 06:56:05,596 INFO L119 LiptonReduction]: Number of co-enabled transitions 25650 [2022-11-19 06:58:36,073 INFO L134 LiptonReduction]: Checked pairs total: 34885 [2022-11-19 06:58:36,073 INFO L136 LiptonReduction]: Total number of compositions: 509 [2022-11-19 06:58:36,082 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 114 places, 115 transitions, 254 flow [2022-11-19 06:58:38,203 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 44255 states, 28281 states have (on average 6.019447685725399) internal successors, (170236), 44254 states have internal predecessors, (170236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:38,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:58:38,234 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;@43f7157d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:58:38,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2022-11-19 06:58:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 44255 states, 28281 states have (on average 6.019447685725399) internal successors, (170236), 44254 states have internal predecessors, (170236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:58:38,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:38,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:58:38,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 06:58:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:38,337 INFO L85 PathProgramCache]: Analyzing trace with hash 62178, now seen corresponding path program 1 times [2022-11-19 06:58:38,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:58:38,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148467710] [2022-11-19 06:58:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:38,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 06:58:38,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:58:38,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 06:58:38,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:58:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:58:38,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:38,839 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 06:58:38,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:58:38,869 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 06:58:38,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:58:38,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:58:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148467710] [2022-11-19 06:58:38,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148467710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:58:38,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:58:38,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:58:38,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277368026] [2022-11-19 06:58:38,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:58:38,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:58:38,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:58:38,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:58:38,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:58:38,965 INFO L87 Difference]: Start difference. First operand has 44255 states, 28281 states have (on average 6.019447685725399) internal successors, (170236), 44254 states have internal predecessors, (170236), 0 states have call successors, (0), 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 06:58:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:40,094 INFO L93 Difference]: Finished difference Result 18299 states and 68536 transitions. [2022-11-19 06:58:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:58:40,097 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 06:58:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:40,520 INFO L225 Difference]: With dead ends: 18299 [2022-11-19 06:58:40,520 INFO L226 Difference]: Without dead ends: 18299 [2022-11-19 06:58:40,521 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 06:58:40,525 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:40,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 3 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:58:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18299 states. [2022-11-19 06:58:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18299 to 18299. [2022-11-19 06:58:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18299 states, 13113 states have (on average 5.226569053610921) internal successors, (68536), 18298 states have internal predecessors, (68536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18299 states to 18299 states and 68536 transitions. [2022-11-19 06:58:41,573 INFO L78 Accepts]: Start accepts. Automaton has 18299 states and 68536 transitions. Word has length 2 [2022-11-19 06:58:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:41,574 INFO L495 AbstractCegarLoop]: Abstraction has 18299 states and 68536 transitions. [2022-11-19 06:58:41,577 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 06:58:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 18299 states and 68536 transitions. [2022-11-19 06:58:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:58:41,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:41,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:58:41,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:41,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:58:41,792 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 06:58:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash 62179, now seen corresponding path program 1 times [2022-11-19 06:58:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:58:41,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909234821] [2022-11-19 06:58:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:41,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 06:58:41,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:58:41,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 06:58:41,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:58:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:58:41,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:42,062 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 06:58:42,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:58:42,102 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 06:58:42,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:58:42,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:58:42,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909234821] [2022-11-19 06:58:42,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909234821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:58:42,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:58:42,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:58:42,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625865481] [2022-11-19 06:58:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:58:42,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:58:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:58:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:58:42,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:58:42,106 INFO L87 Difference]: Start difference. First operand 18299 states and 68536 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 06:58:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:44,216 INFO L93 Difference]: Finished difference Result 36594 states and 137068 transitions. [2022-11-19 06:58:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:58:44,217 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 06:58:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:44,691 INFO L225 Difference]: With dead ends: 36594 [2022-11-19 06:58:44,691 INFO L226 Difference]: Without dead ends: 36594 [2022-11-19 06:58:44,691 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 06:58:44,697 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:44,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 9 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 06:58:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36594 states. [2022-11-19 06:58:45,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36594 to 18302. [2022-11-19 06:58:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18302 states, 13116 states have (on average 5.225983531564501) internal successors, (68544), 18301 states have internal predecessors, (68544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18302 states to 18302 states and 68544 transitions. [2022-11-19 06:58:45,913 INFO L78 Accepts]: Start accepts. Automaton has 18302 states and 68544 transitions. Word has length 2 [2022-11-19 06:58:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:45,913 INFO L495 AbstractCegarLoop]: Abstraction has 18302 states and 68544 transitions. [2022-11-19 06:58:45,913 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 06:58:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18302 states and 68544 transitions. [2022-11-19 06:58:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 06:58:45,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:45,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 06:58:45,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:46,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:58:46,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 06:58:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:46,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1937307, now seen corresponding path program 1 times [2022-11-19 06:58:46,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:58:46,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070617104] [2022-11-19 06:58:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:46,140 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 06:58:46,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:58:46,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 06:58:46,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:58:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:58:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:46,404 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 06:58:46,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:58:46,495 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 06:58:46,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:46,760 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 06:58:46,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:58:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070617104] [2022-11-19 06:58:46,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070617104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339068738] [2022-11-19 06:58:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:46,762 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:58:46,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:58:46,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:58:46,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-19 06:58:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:46,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:58:46,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:47,107 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 06:58:47,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:58:47,161 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 06:58:47,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:47,236 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 06:58:47,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339068738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732028967] [2022-11-19 06:58:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:47,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:47,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:47,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:47,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:58:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:58:47,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:47,532 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 06:58:47,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:58:47,598 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 06:58:47,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:47,778 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 06:58:47,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732028967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:47,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:58:47,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 06:58:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055013879] [2022-11-19 06:58:47,779 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:58:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:58:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:58:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:58:47,781 INFO L87 Difference]: Start difference. First operand 18302 states and 68544 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:49,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:58:51,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:58:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:57,595 INFO L93 Difference]: Finished difference Result 73187 states and 274140 transitions. [2022-11-19 06:58:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:58:57,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 06:58:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:58,236 INFO L225 Difference]: With dead ends: 73187 [2022-11-19 06:58:58,240 INFO L226 Difference]: Without dead ends: 73187 [2022-11-19 06:58:58,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:58:58,244 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 477 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:58,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 30 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-19 06:58:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73187 states. [2022-11-19 06:58:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73187 to 18311. [2022-11-19 06:58:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18311 states, 13125 states have (on average 5.224228571428571) internal successors, (68568), 18310 states have internal predecessors, (68568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18311 states to 18311 states and 68568 transitions. [2022-11-19 06:59:00,007 INFO L78 Accepts]: Start accepts. Automaton has 18311 states and 68568 transitions. Word has length 3 [2022-11-19 06:59:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:00,007 INFO L495 AbstractCegarLoop]: Abstraction has 18311 states and 68568 transitions. [2022-11-19 06:59:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 18311 states and 68568 transitions. [2022-11-19 06:59:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 06:59:00,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:00,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 06:59:00,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:00,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:00,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:00,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:00,613 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 06:59:00,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:00,614 INFO L85 PathProgramCache]: Analyzing trace with hash 60179548, now seen corresponding path program 1 times [2022-11-19 06:59:00,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:59:00,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025534763] [2022-11-19 06:59:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:00,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 06:59:00,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:59:00,616 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 06:59:00,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:59:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:00,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:59:00,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:00,774 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 06:59:00,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:00,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:59:00,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025534763] [2022-11-19 06:59:00,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025534763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:00,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:00,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:59:00,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377206472] [2022-11-19 06:59:00,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:00,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:59:00,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:59:00,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:59:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:59:00,777 INFO L87 Difference]: Start difference. First operand 18311 states and 68568 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 06:59:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:01,962 INFO L93 Difference]: Finished difference Result 18322 states and 68592 transitions. [2022-11-19 06:59:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:59:01,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 06:59:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:02,349 INFO L225 Difference]: With dead ends: 18322 [2022-11-19 06:59:02,349 INFO L226 Difference]: Without dead ends: 18322 [2022-11-19 06:59:02,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 06:59:02,351 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:02,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 06:59:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18322 states. [2022-11-19 06:59:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18322 to 18318. [2022-11-19 06:59:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18318 states, 13132 states have (on average 5.223195248248553) internal successors, (68591), 18317 states have internal predecessors, (68591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18318 states to 18318 states and 68591 transitions. [2022-11-19 06:59:03,172 INFO L78 Accepts]: Start accepts. Automaton has 18318 states and 68591 transitions. Word has length 4 [2022-11-19 06:59:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:03,172 INFO L495 AbstractCegarLoop]: Abstraction has 18318 states and 68591 transitions. [2022-11-19 06:59:03,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 06:59:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 18318 states and 68591 transitions. [2022-11-19 06:59:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:59:03,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:03,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 06:59:03,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:03,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:59:03,373 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 06:59:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1865569053, now seen corresponding path program 1 times [2022-11-19 06:59:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:59:03,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854303520] [2022-11-19 06:59:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 06:59:03,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:59:03,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 06:59:03,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 06:59:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:59:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:03,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:59:03,523 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:59:03,527 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 06:59:03,538 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 06:59:03,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:03,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:59:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854303520] [2022-11-19 06:59:03,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854303520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:03,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:03,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:59:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953446780] [2022-11-19 06:59:03,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:03,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:03,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:59:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:59:03,541 INFO L87 Difference]: Start difference. First operand 18318 states and 68591 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:04,242 INFO L93 Difference]: Finished difference Result 15121 states and 56564 transitions. [2022-11-19 06:59:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 06:59:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:04,293 INFO L225 Difference]: With dead ends: 15121 [2022-11-19 06:59:04,293 INFO L226 Difference]: Without dead ends: 15121 [2022-11-19 06:59:04,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 06:59:04,294 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:04,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 3 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:59:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15121 states. [2022-11-19 06:59:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15121 to 15121. [2022-11-19 06:59:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15121 states, 11139 states have (on average 5.078014184397163) internal successors, (56564), 15120 states have internal predecessors, (56564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15121 states to 15121 states and 56564 transitions. [2022-11-19 06:59:04,834 INFO L78 Accepts]: Start accepts. Automaton has 15121 states and 56564 transitions. Word has length 5 [2022-11-19 06:59:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:04,834 INFO L495 AbstractCegarLoop]: Abstraction has 15121 states and 56564 transitions. [2022-11-19 06:59:04,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 15121 states and 56564 transitions. [2022-11-19 06:59:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:59:04,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:04,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 06:59:04,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:59:05,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 06:59:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1865569054, now seen corresponding path program 1 times [2022-11-19 06:59:05,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:59:05,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804844935] [2022-11-19 06:59:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:05,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 06:59:05,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:59:05,038 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 06:59:05,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 06:59:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:05,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:59:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:05,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 06:59:05,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:59:05,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:05,270 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 16 [2022-11-19 06:59:05,285 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:59:05,285 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 06:59:05,329 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 06:59:05,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:05,330 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:59:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804844935] [2022-11-19 06:59:05,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804844935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:05,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:05,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:59:05,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127416515] [2022-11-19 06:59:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:05,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:59:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:59:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:59:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:59:05,332 INFO L87 Difference]: Start difference. First operand 15121 states and 56564 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:06,821 INFO L93 Difference]: Finished difference Result 28846 states and 107844 transitions. [2022-11-19 06:59:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:59:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 06:59:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:06,971 INFO L225 Difference]: With dead ends: 28846 [2022-11-19 06:59:06,972 INFO L226 Difference]: Without dead ends: 28846 [2022-11-19 06:59:06,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:59:06,972 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:06,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 9 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 151 Unchecked, 1.2s Time] [2022-11-19 06:59:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28846 states. [2022-11-19 06:59:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28846 to 18554. [2022-11-19 06:59:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18554 states, 14572 states have (on average 5.449903925336261) internal successors, (79416), 18553 states have internal predecessors, (79416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18554 states to 18554 states and 79416 transitions. [2022-11-19 06:59:07,781 INFO L78 Accepts]: Start accepts. Automaton has 18554 states and 79416 transitions. Word has length 5 [2022-11-19 06:59:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:07,781 INFO L495 AbstractCegarLoop]: Abstraction has 18554 states and 79416 transitions. [2022-11-19 06:59:07,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 18554 states and 79416 transitions. [2022-11-19 06:59:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:59:07,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:07,782 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 06:59:07,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:07,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 06:59:07,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 06:59:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:07,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1889427683, now seen corresponding path program 2 times [2022-11-19 06:59:07,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:59:07,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757073899] [2022-11-19 06:59:07,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:59:07,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 06:59:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:59:07,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 06:59:07,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 06:59:08,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:59:08,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:59:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:08,550 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 06:59:08,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:59:08,749 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 06:59:08,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:09,483 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 06:59:09,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:59:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757073899] [2022-11-19 06:59:09,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757073899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:09,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917183390] [2022-11-19 06:59:09,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:59:09,484 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:59:09,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:59:09,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:59:09,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-19 06:59:09,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:59:09,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:09,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:59:09,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:09,912 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 06:59:09,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:59:10,051 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 06:59:10,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:11,067 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 06:59:11,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917183390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614416893] [2022-11-19 06:59:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:59:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:11,069 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:11,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:59:11,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:59:11,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:11,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:59:11,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:11,384 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 06:59:11,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:59:11,485 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 06:59:11,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:11,676 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 06:59:11,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614416893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:11,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:59:11,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 06:59:11,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118179901] [2022-11-19 06:59:11,677 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:11,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:59:11,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:59:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:59:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:59:11,679 INFO L87 Difference]: Start difference. First operand 18554 states and 79416 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:16,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:18,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:19,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:21,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:23,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:25,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:27,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:29,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:31,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:32,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:34,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:36,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:39,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:40,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:42,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:44,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:46,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:48,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:50,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:52,329 WARN L539 Checker$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 06:59:55,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:57,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:59:58,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:00:00,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:00:03,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:00:06,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:00:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:25,895 INFO L93 Difference]: Finished difference Result 142779 states and 554388 transitions. [2022-11-19 07:00:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:00:25,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:00:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:26,775 INFO L225 Difference]: With dead ends: 142779 [2022-11-19 07:00:26,775 INFO L226 Difference]: Without dead ends: 142779 [2022-11-19 07:00:26,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=211, Invalid=389, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:00:26,776 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1511 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 3551 mSolverCounterSat, 238 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 3551 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:26,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1511 Valid, 138 Invalid, 3802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 3551 Invalid, 13 Unknown, 0 Unchecked, 69.7s Time] [2022-11-19 07:00:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142779 states. [2022-11-19 07:00:29,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142779 to 18576. [2022-11-19 07:00:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18576 states, 14594 states have (on average 5.445868164999315) internal successors, (79477), 18575 states have internal predecessors, (79477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18576 states to 18576 states and 79477 transitions. [2022-11-19 07:00:29,636 INFO L78 Accepts]: Start accepts. Automaton has 18576 states and 79477 transitions. Word has length 6 [2022-11-19 07:00:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:29,636 INFO L495 AbstractCegarLoop]: Abstraction has 18576 states and 79477 transitions. [2022-11-19 07:00:29,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 18576 states and 79477 transitions. [2022-11-19 07:00:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:00:29,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:29,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:00:29,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:29,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:30,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:30,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:30,265 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:00:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1892912144, now seen corresponding path program 1 times [2022-11-19 07:00:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:30,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960266417] [2022-11-19 07:00:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:30,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:00:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:30,267 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:00:30,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:00:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:30,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:00:30,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:30,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:30,641 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:00:30,641 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 07:00:30,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:30,760 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 07:00:30,845 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:00:30,845 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 07:00:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:30,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:30,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:30,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960266417] [2022-11-19 07:00:30,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960266417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:30,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:30,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:00:30,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713101032] [2022-11-19 07:00:30,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:30,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:30,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:30,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:30,867 INFO L87 Difference]: Start difference. First operand 18576 states and 79477 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:32,376 INFO L93 Difference]: Finished difference Result 25951 states and 95916 transitions. [2022-11-19 07:00:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:00:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:32,561 INFO L225 Difference]: With dead ends: 25951 [2022-11-19 07:00:32,562 INFO L226 Difference]: Without dead ends: 25951 [2022-11-19 07:00:32,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:00:32,564 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 146 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:32,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 6 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 76 Unchecked, 1.3s Time] [2022-11-19 07:00:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25951 states. [2022-11-19 07:00:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25951 to 20196. [2022-11-19 07:00:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20196 states, 16214 states have (on average 5.172566917478722) internal successors, (83868), 20195 states have internal predecessors, (83868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20196 states to 20196 states and 83868 transitions. [2022-11-19 07:00:33,633 INFO L78 Accepts]: Start accepts. Automaton has 20196 states and 83868 transitions. Word has length 6 [2022-11-19 07:00:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:33,633 INFO L495 AbstractCegarLoop]: Abstraction has 20196 states and 83868 transitions. [2022-11-19 07:00:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 20196 states and 83868 transitions. [2022-11-19 07:00:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:00:33,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:33,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:00:33,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:33,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:00:33,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:00:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:33,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1892912145, now seen corresponding path program 1 times [2022-11-19 07:00:33,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:33,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686551687] [2022-11-19 07:00:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:33,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:00:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:33,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:00:33,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:00:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:00:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:34,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:34,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:34,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:34,288 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:00:34,289 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 07:00:34,339 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:00:34,340 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 07:00:34,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:34,427 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 07:00:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:34,475 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 07:00:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:34,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:34,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:34,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686551687] [2022-11-19 07:00:34,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686551687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:34,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:34,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:00:34,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660333219] [2022-11-19 07:00:34,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:34,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:34,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:34,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:34,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:34,514 INFO L87 Difference]: Start difference. First operand 20196 states and 83868 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:36,477 INFO L93 Difference]: Finished difference Result 23034 states and 83927 transitions. [2022-11-19 07:00:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:00:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:36,621 INFO L225 Difference]: With dead ends: 23034 [2022-11-19 07:00:36,621 INFO L226 Difference]: Without dead ends: 23034 [2022-11-19 07:00:36,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 07:00:36,622 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 142 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:36,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 6 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 77 Unchecked, 1.6s Time] [2022-11-19 07:00:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23034 states. [2022-11-19 07:00:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23034 to 19548. [2022-11-19 07:00:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19548 states, 15566 states have (on average 4.92528587948092) internal successors, (76667), 19547 states have internal predecessors, (76667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19548 states to 19548 states and 76667 transitions. [2022-11-19 07:00:37,434 INFO L78 Accepts]: Start accepts. Automaton has 19548 states and 76667 transitions. Word has length 6 [2022-11-19 07:00:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:37,434 INFO L495 AbstractCegarLoop]: Abstraction has 19548 states and 76667 transitions. [2022-11-19 07:00:37,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 19548 states and 76667 transitions. [2022-11-19 07:00:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:00:37,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:37,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:00:37,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:00:37,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:00:37,635 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:00:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1998069853, now seen corresponding path program 1 times [2022-11-19 07:00:37,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:37,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494779761] [2022-11-19 07:00:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:37,636 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 07:00:37,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:37,637 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:00:37,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:00:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:00:37,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:37,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:00:37,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:00:37,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:37,972 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 16 [2022-11-19 07:00:37,985 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:37,986 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 07:00:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:00:38,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:38,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:38,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494779761] [2022-11-19 07:00:38,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494779761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:38,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:38,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:00:38,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38736867] [2022-11-19 07:00:38,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:38,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:38,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:38,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:38,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:38,054 INFO L87 Difference]: Start difference. First operand 19548 states and 76667 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:39,575 INFO L93 Difference]: Finished difference Result 23052 states and 83969 transitions. [2022-11-19 07:00:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:00:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:00:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:39,716 INFO L225 Difference]: With dead ends: 23052 [2022-11-19 07:00:39,716 INFO L226 Difference]: Without dead ends: 23052 [2022-11-19 07:00:39,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:00:39,717 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:39,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 9 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 82 Unchecked, 1.3s Time] [2022-11-19 07:00:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23052 states. [2022-11-19 07:00:40,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23052 to 19566. [2022-11-19 07:00:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19566 states, 15584 states have (on average 4.922292094455853) internal successors, (76709), 19565 states have internal predecessors, (76709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19566 states to 19566 states and 76709 transitions. [2022-11-19 07:00:40,625 INFO L78 Accepts]: Start accepts. Automaton has 19566 states and 76709 transitions. Word has length 6 [2022-11-19 07:00:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:40,625 INFO L495 AbstractCegarLoop]: Abstraction has 19566 states and 76709 transitions. [2022-11-19 07:00:40,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 19566 states and 76709 transitions. [2022-11-19 07:00:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:00:40,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:40,626 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-19 07:00:40,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:00:40,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:00:40,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:00:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1810623327, now seen corresponding path program 1 times [2022-11-19 07:00:40,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:40,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824328094] [2022-11-19 07:00:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:40,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:00:40,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:40,831 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:00:40,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:00:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:41,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:00:41,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:41,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:00:41,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:00:41,119 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:00:41,119 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 07:00:41,147 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:41,147 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 07:00:41,302 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:00:41,302 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 07:00:41,347 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:41,348 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 07:00:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:41,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:41,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:41,832 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 50 treesize of output 74 [2022-11-19 07:00:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:45,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:45,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824328094] [2022-11-19 07:00:45,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824328094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:45,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [240103698] [2022-11-19 07:00:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:45,019 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:45,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:00:45,025 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:00:45,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-19 07:00:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:00:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:45,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:00:45,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:00:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,373 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 16 [2022-11-19 07:00:45,389 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:45,390 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 07:00:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:45,519 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 16 [2022-11-19 07:00:45,564 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:45,564 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 07:00:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:45,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:45,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:45,895 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 50 treesize of output 74 [2022-11-19 07:00:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:48,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [240103698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959679964] [2022-11-19 07:00:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:48,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:48,916 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:48,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:00:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:00:49,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:49,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:00:49,120 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:00:49,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,151 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 16 [2022-11-19 07:00:49,168 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:49,168 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 07:00:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:49,312 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 16 [2022-11-19 07:00:49,335 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:49,336 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 07:00:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:49,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:49,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:49,578 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 50 treesize of output 74 [2022-11-19 07:00:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:54,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959679964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:54,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:00:54,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-19 07:00:54,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223806228] [2022-11-19 07:00:54,957 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:54,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:00:54,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:54,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:00:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=155, Unknown=2, NotChecked=0, Total=210 [2022-11-19 07:00:54,959 INFO L87 Difference]: Start difference. First operand 19566 states and 76709 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:58,294 INFO L93 Difference]: Finished difference Result 53595 states and 201968 transitions. [2022-11-19 07:00:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:00:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:00:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:58,550 INFO L225 Difference]: With dead ends: 53595 [2022-11-19 07:00:58,551 INFO L226 Difference]: Without dead ends: 53595 [2022-11-19 07:00:58,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=74, Invalid=196, Unknown=2, NotChecked=0, Total=272 [2022-11-19 07:00:58,551 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 530 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:58,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 54 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 625 Invalid, 0 Unknown, 695 Unchecked, 2.9s Time] [2022-11-19 07:00:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53595 states. [2022-11-19 07:00:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53595 to 22203. [2022-11-19 07:00:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22203 states, 18221 states have (on average 5.175237363481697) internal successors, (94298), 22202 states have internal predecessors, (94298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22203 states to 22203 states and 94298 transitions. [2022-11-19 07:00:59,838 INFO L78 Accepts]: Start accepts. Automaton has 22203 states and 94298 transitions. Word has length 7 [2022-11-19 07:00:59,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:59,838 INFO L495 AbstractCegarLoop]: Abstraction has 22203 states and 94298 transitions. [2022-11-19 07:00:59,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:59,839 INFO L276 IsEmpty]: Start isEmpty. Operand 22203 states and 94298 transitions. [2022-11-19 07:00:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:00:59,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:59,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:59,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-19 07:01:00,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:00,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:00,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:00,474 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:01:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1977464145, now seen corresponding path program 1 times [2022-11-19 07:01:00,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:00,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436525256] [2022-11-19 07:01:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:00,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:01:00,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:00,477 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:01:00,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:00,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:01:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:00,877 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:01:00,877 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 07:01:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:01,255 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:01:01,256 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 07:01:01,798 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-19 07:01:01,798 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 51 treesize of output 80 [2022-11-19 07:01:02,447 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-19 07:01:02,448 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 70 treesize of output 99 [2022-11-19 07:01:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:04,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:04,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:04,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436525256] [2022-11-19 07:01:04,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436525256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:04,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:04,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:04,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493656658] [2022-11-19 07:01:04,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:04,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:01:04,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:04,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:01:04,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:01:04,889 INFO L87 Difference]: Start difference. First operand 22203 states and 94298 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:05,850 INFO L93 Difference]: Finished difference Result 22215 states and 94324 transitions. [2022-11-19 07:01:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:01:05,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:01:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:05,959 INFO L225 Difference]: With dead ends: 22215 [2022-11-19 07:01:05,959 INFO L226 Difference]: Without dead ends: 22215 [2022-11-19 07:01:05,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:01:05,960 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:05,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 83 Unchecked, 0.6s Time] [2022-11-19 07:01:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22215 states. [2022-11-19 07:01:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22215 to 22209. [2022-11-19 07:01:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22209 states, 18227 states have (on average 5.174411587205793) internal successors, (94314), 22208 states have internal predecessors, (94314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22209 states to 22209 states and 94314 transitions. [2022-11-19 07:01:06,777 INFO L78 Accepts]: Start accepts. Automaton has 22209 states and 94314 transitions. Word has length 8 [2022-11-19 07:01:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:06,778 INFO L495 AbstractCegarLoop]: Abstraction has 22209 states and 94314 transitions. [2022-11-19 07:01:06,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 22209 states and 94314 transitions. [2022-11-19 07:01:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:01:06,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:06,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:06,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:06,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:01:06,980 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:01:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:06,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1977464144, now seen corresponding path program 1 times [2022-11-19 07:01:06,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:06,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992986388] [2022-11-19 07:01:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:06,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:01:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:06,983 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:01:06,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:01:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:07,684 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:01:07,685 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 07:01:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:07,771 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:01:07,771 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 07:01:07,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:07,893 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 07:01:07,920 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:01:07,921 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 07:01:08,074 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:01:08,074 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-19 07:01:08,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:08,230 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 16 treesize of output 18 [2022-11-19 07:01:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:08,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:10,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:10,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992986388] [2022-11-19 07:01:10,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992986388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:10,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [687791985] [2022-11-19 07:01:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:10,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:10,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:01:10,634 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:01:10,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-19 07:01:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:01:11,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:11,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:11,212 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:01:11,212 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 07:01:11,250 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:01:11,250 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 07:01:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:11,375 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 07:01:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:11,429 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 07:01:11,487 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:01:11,488 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 07:01:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:11,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:15,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [687791985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097002408] [2022-11-19 07:01:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:15,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:15,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:15,551 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:15,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:01:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-19 07:01:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:15,964 INFO L321 Elim1Store]: treesize reduction 135, result has 14.0 percent of original size [2022-11-19 07:01:15,965 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 8 case distinctions, treesize of input 55 treesize of output 62 [2022-11-19 07:01:15,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-19 07:01:16,109 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:01:16,110 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 07:01:16,157 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:01:16,157 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 24 [2022-11-19 07:01:16,581 INFO L321 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-11-19 07:01:16,581 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 37 treesize of output 56 [2022-11-19 07:01:16,661 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-19 07:01:16,661 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 36 treesize of output 61 [2022-11-19 07:01:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:16,940 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 07:01:16,941 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 35 treesize of output 42 [2022-11-19 07:01:17,002 INFO L321 Elim1Store]: treesize reduction 6, result has 80.6 percent of original size [2022-11-19 07:01:17,003 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 39 treesize of output 57 [2022-11-19 07:01:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:01:17,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:01:27,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097002408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:27,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:01:27,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3, 2, 6, 6] total 26 [2022-11-19 07:01:27,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520719572] [2022-11-19 07:01:27,427 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:27,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:01:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:01:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:01:27,429 INFO L87 Difference]: Start difference. First operand 22209 states and 94314 transitions. Second operand has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:30,480 INFO L93 Difference]: Finished difference Result 22214 states and 94322 transitions. [2022-11-19 07:01:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:01:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:01:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:30,591 INFO L225 Difference]: With dead ends: 22214 [2022-11-19 07:01:30,591 INFO L226 Difference]: Without dead ends: 22214 [2022-11-19 07:01:30,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:01:30,592 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:30,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 451 Unchecked, 0.5s Time] [2022-11-19 07:01:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22214 states. [2022-11-19 07:01:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22214 to 22209. [2022-11-19 07:01:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22209 states, 18227 states have (on average 5.174356723541998) internal successors, (94313), 22208 states have internal predecessors, (94313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22209 states to 22209 states and 94313 transitions. [2022-11-19 07:01:31,355 INFO L78 Accepts]: Start accepts. Automaton has 22209 states and 94313 transitions. Word has length 8 [2022-11-19 07:01:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:31,355 INFO L495 AbstractCegarLoop]: Abstraction has 22209 states and 94313 transitions. [2022-11-19 07:01:31,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 22209 states and 94313 transitions. [2022-11-19 07:01:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:01:31,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:31,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:31,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:31,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:31,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:31,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:31,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:01:31,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1977515713, now seen corresponding path program 1 times [2022-11-19 07:01:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:31,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390944104] [2022-11-19 07:01:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:31,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:01:31,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:31,960 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:01:31,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:32,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:01:32,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:32,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:32,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:32,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:32,340 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 07:01:32,340 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 07:01:32,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 07:01:32,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:32,416 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 07:01:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:32,455 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 07:01:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:32,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:32,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390944104] [2022-11-19 07:01:32,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390944104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:32,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:32,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:01:32,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48316557] [2022-11-19 07:01:32,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:32,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:01:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:01:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:01:32,512 INFO L87 Difference]: Start difference. First operand 22209 states and 94313 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:33,355 INFO L93 Difference]: Finished difference Result 21975 states and 93454 transitions. [2022-11-19 07:01:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:01:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:01:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:33,464 INFO L225 Difference]: With dead ends: 21975 [2022-11-19 07:01:33,464 INFO L226 Difference]: Without dead ends: 21975 [2022-11-19 07:01:33,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 07:01:33,465 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:33,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 3 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 2 Unchecked, 0.7s Time] [2022-11-19 07:01:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21975 states. [2022-11-19 07:01:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21975 to 21975. [2022-11-19 07:01:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21975 states, 18101 states have (on average 5.162919175736147) internal successors, (93454), 21974 states have internal predecessors, (93454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21975 states to 21975 states and 93454 transitions. [2022-11-19 07:01:34,407 INFO L78 Accepts]: Start accepts. Automaton has 21975 states and 93454 transitions. Word has length 8 [2022-11-19 07:01:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:34,407 INFO L495 AbstractCegarLoop]: Abstraction has 21975 states and 93454 transitions. [2022-11-19 07:01:34,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21975 states and 93454 transitions. [2022-11-19 07:01:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:01:34,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:34,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:34,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:34,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:01:34,614 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:01:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:34,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1977515712, now seen corresponding path program 1 times [2022-11-19 07:01:34,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:34,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858728084] [2022-11-19 07:01:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:34,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:01:34,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:34,617 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:01:34,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:35,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:01:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:35,422 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 07:01:35,422 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-19 07:01:35,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:35,536 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 07:01:35,603 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:01:35,603 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 07:01:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:35,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:35,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:35,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858728084] [2022-11-19 07:01:35,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858728084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:35,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:35,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:01:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256019089] [2022-11-19 07:01:35,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:35,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:01:35,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:01:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:01:35,646 INFO L87 Difference]: Start difference. First operand 21975 states and 93454 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:37,047 INFO L93 Difference]: Finished difference Result 25901 states and 104940 transitions. [2022-11-19 07:01:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:01:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:01:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:37,156 INFO L225 Difference]: With dead ends: 25901 [2022-11-19 07:01:37,156 INFO L226 Difference]: Without dead ends: 25901 [2022-11-19 07:01:37,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 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 07:01:37,157 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 132 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:37,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 6 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 74 Unchecked, 1.2s Time] [2022-11-19 07:01:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25901 states. [2022-11-19 07:01:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25901 to 23271. [2022-11-19 07:01:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23271 states, 19397 states have (on average 5.1297623343816054) internal successors, (99502), 23270 states have internal predecessors, (99502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23271 states to 23271 states and 99502 transitions. [2022-11-19 07:01:37,909 INFO L78 Accepts]: Start accepts. Automaton has 23271 states and 99502 transitions. Word has length 8 [2022-11-19 07:01:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:37,909 INFO L495 AbstractCegarLoop]: Abstraction has 23271 states and 99502 transitions. [2022-11-19 07:01:37,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23271 states and 99502 transitions. [2022-11-19 07:01:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:01:37,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:37,910 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:37,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:38,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:01:38,112 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:01:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:38,112 INFO L85 PathProgramCache]: Analyzing trace with hash 294752316, now seen corresponding path program 1 times [2022-11-19 07:01:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114502638] [2022-11-19 07:01:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:38,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:01:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:38,114 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:01:38,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:01:38,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:38,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:38,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114502638] [2022-11-19 07:01:38,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114502638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1758692930] [2022-11-19 07:01:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:38,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:01:38,556 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:01:38,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-19 07:01:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:01:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:38,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:39,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1758692930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:39,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739074652] [2022-11-19 07:01:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:39,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:39,024 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:39,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:01:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:01:39,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:39,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:39,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739074652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:39,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:01:39,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-19 07:01:39,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22394749] [2022-11-19 07:01:39,304 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:39,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:01:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:01:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:01:39,305 INFO L87 Difference]: Start difference. First operand 23271 states and 99502 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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 07:01:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:42,917 INFO L93 Difference]: Finished difference Result 37504 states and 157066 transitions. [2022-11-19 07:01:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:01:42,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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 8 [2022-11-19 07:01:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:43,125 INFO L225 Difference]: With dead ends: 37504 [2022-11-19 07:01:43,125 INFO L226 Difference]: Without dead ends: 37504 [2022-11-19 07:01:43,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:01:43,126 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 351 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:43,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 27 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 07:01:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37504 states. [2022-11-19 07:01:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37504 to 26670. [2022-11-19 07:01:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26670 states, 22796 states have (on average 5.177882084576241) internal successors, (118035), 26669 states have internal predecessors, (118035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26670 states to 26670 states and 118035 transitions. [2022-11-19 07:01:44,550 INFO L78 Accepts]: Start accepts. Automaton has 26670 states and 118035 transitions. Word has length 8 [2022-11-19 07:01:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:44,551 INFO L495 AbstractCegarLoop]: Abstraction has 26670 states and 118035 transitions. [2022-11-19 07:01:44,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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 07:01:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 26670 states and 118035 transitions. [2022-11-19 07:01:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:01:44,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:44,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:44,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:44,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:44,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:45,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:01:45,153 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:01:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1171839384, now seen corresponding path program 1 times [2022-11-19 07:01:45,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:45,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799186548] [2022-11-19 07:01:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:45,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:01:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:45,162 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:01:45,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:01:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:45,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:45,794 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:01:45,794 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 07:01:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:46,147 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:01:46,148 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 07:01:46,542 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-19 07:01:46,543 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 84 [2022-11-19 07:01:47,206 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-19 07:01:47,206 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 70 treesize of output 99 [2022-11-19 07:01:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:01:51,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:51,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:51,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799186548] [2022-11-19 07:01:51,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799186548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:51,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:51,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:01:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866703705] [2022-11-19 07:01:51,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:01:51,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:01:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=20, Unknown=1, NotChecked=0, Total=42 [2022-11-19 07:01:51,191 INFO L87 Difference]: Start difference. First operand 26670 states and 118035 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 07:01:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:51,850 INFO L93 Difference]: Finished difference Result 26669 states and 118031 transitions. [2022-11-19 07:01:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:01:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:01:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:51,990 INFO L225 Difference]: With dead ends: 26669 [2022-11-19 07:01:51,990 INFO L226 Difference]: Without dead ends: 26669 [2022-11-19 07:01:51,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=21, Invalid=20, Unknown=1, NotChecked=0, Total=42 [2022-11-19 07:01:51,991 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:51,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 210 Unchecked, 0.5s Time] [2022-11-19 07:01:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26669 states. [2022-11-19 07:01:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26669 to 26665. [2022-11-19 07:01:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26665 states, 22792 states have (on average 5.1782204282204285) internal successors, (118022), 26664 states have internal predecessors, (118022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26665 states to 26665 states and 118022 transitions. [2022-11-19 07:01:52,825 INFO L78 Accepts]: Start accepts. Automaton has 26665 states and 118022 transitions. Word has length 9 [2022-11-19 07:01:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:52,825 INFO L495 AbstractCegarLoop]: Abstraction has 26665 states and 118022 transitions. [2022-11-19 07:01:52,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 07:01:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 26665 states and 118022 transitions. [2022-11-19 07:01:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:01:52,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:52,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:52,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:53,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:01:53,030 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:01:53,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:53,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1171839383, now seen corresponding path program 1 times [2022-11-19 07:01:53,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:53,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177136942] [2022-11-19 07:01:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:53,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:01:53,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:53,034 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:01:53,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:01:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:53,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:01:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:53,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:53,803 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:01:53,803 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 07:01:53,828 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:01:53,829 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 07:01:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:53,951 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 07:01:54,045 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:01:54,045 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 07:01:54,130 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:01:54,131 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 24 [2022-11-19 07:01:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:54,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:59,690 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#t1~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_create_fresh_int_array_~size#1_213| (_ BitVec 32)) (v_~mult~0.base_243 (_ BitVec 32)) (v_ArrVal_1408 (_ BitVec 32))) (or (bvslt (_ bv1 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_213|) (not (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_213|)) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_187| (_ BitVec 32))) (let ((.cse0 (store (store |c_#length| v_~mult~0.base_243 v_ArrVal_1408) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_187| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_213|)))) (or (not (bvule (_ bv4 32) (select .cse0 v_~mult~0.base_243))) (bvule .cse1 (select .cse0 |c_ULTIMATE.start_main_~#t1~0#1.base|))))))) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~size#1_213| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_187| (_ BitVec 32)) (v_~mult~0.base_243 (_ BitVec 32)) (v_ArrVal_1408 (_ BitVec 32))) (or (not (bvule (_ bv4 32) (select (store (store |c_#length| v_~mult~0.base_243 v_ArrVal_1408) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_187| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_213|)) v_~mult~0.base_243))) (bvslt (_ bv1 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_213|) (not (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_213|)))) (bvule |c_ULTIMATE.start_main_~#t1~0#1.offset| .cse1)))) is different from false [2022-11-19 07:02:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:02,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:02:02,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177136942] [2022-11-19 07:02:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177136942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887119059] [2022-11-19 07:02:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:02,142 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:02:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:02:02,143 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:02:02,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-19 07:02:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:02,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:02:02,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:02,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:02,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:02,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:03,029 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:02:03,029 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 07:02:03,057 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:02:03,057 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 07:02:03,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:03,117 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 07:02:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:03,150 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 07:02:03,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:03,179 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 07:02:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:02:03,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:02:08,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887119059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544598292] [2022-11-19 07:02:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:08,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:08,151 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:08,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 07:02:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:02:08,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:08,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-19 07:02:08,484 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 07:02:08,484 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 40 treesize of output 34 [2022-11-19 07:02:08,579 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:02:08,579 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 07:02:08,924 INFO L321 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-11-19 07:02:08,924 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 30 treesize of output 49 [2022-11-19 07:02:09,340 INFO L321 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-11-19 07:02:09,341 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 30 treesize of output 49 [2022-11-19 07:02:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:02:10,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:02:20,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544598292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:20,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:02:20,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 2, 2, 7, 7] total 27 [2022-11-19 07:02:20,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456314601] [2022-11-19 07:02:20,829 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:20,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:02:20,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:02:20,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:02:20,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=610, Unknown=2, NotChecked=52, Total=812 [2022-11-19 07:02:20,830 INFO L87 Difference]: Start difference. First operand 26665 states and 118022 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:28,772 INFO L93 Difference]: Finished difference Result 26676 states and 118040 transitions. [2022-11-19 07:02:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:02:28,773 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:02:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:28,937 INFO L225 Difference]: With dead ends: 26676 [2022-11-19 07:02:28,937 INFO L226 Difference]: Without dead ends: 26676 [2022-11-19 07:02:28,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=448, Invalid=1360, Unknown=2, NotChecked=82, Total=1892 [2022-11-19 07:02:28,938 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 139 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1038 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:28,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 84 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 485 Invalid, 0 Unknown, 1038 Unchecked, 4.5s Time] [2022-11-19 07:02:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26676 states. [2022-11-19 07:02:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26676 to 26667. [2022-11-19 07:02:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26667 states, 22794 states have (on average 5.177941563569361) internal successors, (118026), 26666 states have internal predecessors, (118026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26667 states to 26667 states and 118026 transitions. [2022-11-19 07:02:29,807 INFO L78 Accepts]: Start accepts. Automaton has 26667 states and 118026 transitions. Word has length 9 [2022-11-19 07:02:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:29,807 INFO L495 AbstractCegarLoop]: Abstraction has 26667 states and 118026 transitions. [2022-11-19 07:02:29,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 26667 states and 118026 transitions. [2022-11-19 07:02:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:02:29,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:29,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:29,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-19 07:02:30,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-19 07:02:30,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:30,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:30,412 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:02:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1173459167, now seen corresponding path program 1 times [2022-11-19 07:02:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:02:30,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983471796] [2022-11-19 07:02:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:30,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:02:30,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:02:30,415 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:02:30,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:02:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:30,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:02:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:30,862 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:02:30,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 07:02:30,905 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:02:30,906 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 07:02:30,934 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:02:30,934 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 07:02:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:02:30,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:02:30,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:02:30,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983471796] [2022-11-19 07:02:30,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983471796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:02:30,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:02:30,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:02:30,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196209620] [2022-11-19 07:02:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:02:30,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:02:30,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:02:30,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:02:30,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:02:30,955 INFO L87 Difference]: Start difference. First operand 26667 states and 118026 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 07:02:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:31,778 INFO L93 Difference]: Finished difference Result 19861 states and 86347 transitions. [2022-11-19 07:02:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:02:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:02:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:32,224 INFO L225 Difference]: With dead ends: 19861 [2022-11-19 07:02:32,224 INFO L226 Difference]: Without dead ends: 19861 [2022-11-19 07:02:32,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 07:02:32,225 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 139 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:32,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:02:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19861 states. [2022-11-19 07:02:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19861 to 19861. [2022-11-19 07:02:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19861 states, 17462 states have (on average 4.9448516779292175) internal successors, (86347), 19860 states have internal predecessors, (86347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:02:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19861 states to 19861 states and 86347 transitions. [2022-11-19 07:02:32,723 INFO L78 Accepts]: Start accepts. Automaton has 19861 states and 86347 transitions. Word has length 9 [2022-11-19 07:02:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:32,723 INFO L495 AbstractCegarLoop]: Abstraction has 19861 states and 86347 transitions. [2022-11-19 07:02:32,724 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 07:02:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 19861 states and 86347 transitions. [2022-11-19 07:02:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:02:32,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:32,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:32,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:02:33,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:02:33,162 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:02:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1173459166, now seen corresponding path program 1 times [2022-11-19 07:02:33,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:02:33,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651624545] [2022-11-19 07:02:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:33,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:02:33,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:02:33,164 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:02:33,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:02:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:02:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:33,725 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:02:33,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:02:33,885 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:02:33,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:02:34,035 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:02:34,035 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 07:02:34,045 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 16 [2022-11-19 07:02:34,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:34,118 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 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:02:34,131 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:02:34,132 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 07:02:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:02:34,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:02:37,204 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:02:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651624545] [2022-11-19 07:02:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651624545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1432648983] [2022-11-19 07:02:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:37,205 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:02:37,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:02:37,206 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:02:37,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-19 07:02:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:37,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:02:37,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:37,859 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:02:37,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:02:38,018 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:02:38,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:02:38,265 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:02:38,265 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 07:02:38,274 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 07:02:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:38,424 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:02:38,425 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 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-19 07:02:38,445 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:02:38,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 07:02:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:02:38,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:02:43,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1432648983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:43,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511862914] [2022-11-19 07:02:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:43,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:43,428 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:43,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-19 07:02:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:43,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:02:43,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:43,809 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:02:43,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:02:43,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:43,947 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 16 [2022-11-19 07:02:43,987 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:02:43,988 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 07:02:44,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:44,041 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 16 [2022-11-19 07:02:44,057 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:02:44,057 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 07:02:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:02:44,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:47,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:47,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 172 [2022-11-19 07:02:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:02:52,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511862914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:52,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:02:52,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-19 07:02:52,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452321394] [2022-11-19 07:02:52,870 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:52,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:02:52,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:02:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:02:52,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=244, Unknown=4, NotChecked=0, Total=306 [2022-11-19 07:02:52,871 INFO L87 Difference]: Start difference. First operand 19861 states and 86347 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 07:03:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:00,532 INFO L93 Difference]: Finished difference Result 31551 states and 137206 transitions. [2022-11-19 07:03:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:03:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 9 [2022-11-19 07:03:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:00,682 INFO L225 Difference]: With dead ends: 31551 [2022-11-19 07:03:00,682 INFO L226 Difference]: Without dead ends: 31551 [2022-11-19 07:03:00,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=109, Invalid=437, Unknown=6, NotChecked=0, Total=552 [2022-11-19 07:03:00,683 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 578 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:00,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 57 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 405 Invalid, 0 Unknown, 578 Unchecked, 2.3s Time] [2022-11-19 07:03:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31551 states. [2022-11-19 07:03:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31551 to 23647. [2022-11-19 07:03:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23647 states, 21248 states have (on average 5.223032756024097) internal successors, (110979), 23646 states have internal predecessors, (110979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23647 states to 23647 states and 110979 transitions. [2022-11-19 07:03:01,508 INFO L78 Accepts]: Start accepts. Automaton has 23647 states and 110979 transitions. Word has length 9 [2022-11-19 07:03:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:01,508 INFO L495 AbstractCegarLoop]: Abstraction has 23647 states and 110979 transitions. [2022-11-19 07:03:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 07:03:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23647 states and 110979 transitions. [2022-11-19 07:03:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:03:01,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:01,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-19 07:03:01,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:01,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:01,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:03:02,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:03:02,115 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:03:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:02,117 INFO L85 PathProgramCache]: Analyzing trace with hash 551110301, now seen corresponding path program 2 times [2022-11-19 07:03:02,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:02,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495122828] [2022-11-19 07:03:02,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:03:02,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:03:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:02,119 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:03:02,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:03:02,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:03:02,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:03:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:02,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:03:02,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:03:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,552 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 16 [2022-11-19 07:03:02,570 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:03:02,571 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 07:03:02,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:02,669 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 16 [2022-11-19 07:03:02,681 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:03:02,681 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 07:03:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:03:02,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:05,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:05,104 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 50 treesize of output 74 [2022-11-19 07:03:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:03:09,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:09,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495122828] [2022-11-19 07:03:09,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495122828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:09,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [519376459] [2022-11-19 07:03:09,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:03:09,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:03:09,751 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:03:09,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-19 07:03:10,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:03:10,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:03:10,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:10,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:03:10,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:03:10,423 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:03:10,424 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 07:03:10,438 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 16 [2022-11-19 07:03:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:10,552 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 16 [2022-11-19 07:03:10,576 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:03:10,576 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 07:03:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:03:10,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:11,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:11,179 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 50 treesize of output 74 [2022-11-19 07:03:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:03:14,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [519376459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95463521] [2022-11-19 07:03:14,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:03:14,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:14,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:14,145 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:14,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 07:03:14,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:03:14,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:03:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:14,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:03:14,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:03:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,497 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 16 [2022-11-19 07:03:14,519 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:03:14,520 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 07:03:14,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:14,582 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 16 [2022-11-19 07:03:14,604 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:03:14,605 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 07:03:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:03:14,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:14,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:14,831 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 50 treesize of output 74 [2022-11-19 07:03:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:03:17,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95463521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:17,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:03:17,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-19 07:03:17,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073370313] [2022-11-19 07:03:17,328 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:17,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:03:17,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:17,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:03:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2022-11-19 07:03:17,329 INFO L87 Difference]: Start difference. First operand 23647 states and 110979 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 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 07:03:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:20,877 INFO L93 Difference]: Finished difference Result 47670 states and 211368 transitions. [2022-11-19 07:03:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 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 9 [2022-11-19 07:03:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:21,112 INFO L225 Difference]: With dead ends: 47670 [2022-11-19 07:03:21,112 INFO L226 Difference]: Without dead ends: 47670 [2022-11-19 07:03:21,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=49, Invalid=132, Unknown=1, NotChecked=0, Total=182 [2022-11-19 07:03:21,113 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 408 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:21,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 42 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 589 Invalid, 0 Unknown, 265 Unchecked, 2.7s Time] [2022-11-19 07:03:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47670 states. [2022-11-19 07:03:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47670 to 23686. [2022-11-19 07:03:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23686 states, 21287 states have (on average 5.217644571804388) internal successors, (111068), 23685 states have internal predecessors, (111068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23686 states to 23686 states and 111068 transitions. [2022-11-19 07:03:22,366 INFO L78 Accepts]: Start accepts. Automaton has 23686 states and 111068 transitions. Word has length 9 [2022-11-19 07:03:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:22,368 INFO L495 AbstractCegarLoop]: Abstraction has 23686 states and 111068 transitions. [2022-11-19 07:03:22,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 11 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 07:03:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 23686 states and 111068 transitions. [2022-11-19 07:03:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:03:22,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:22,369 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-19 07:03:22,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:22,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:03:22,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:22,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:22,979 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:03:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:22,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1701513587, now seen corresponding path program 1 times [2022-11-19 07:03:22,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:22,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079227258] [2022-11-19 07:03:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:22,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:03:22,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:22,981 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:03:22,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-19 07:03:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:03:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:23,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:03:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:03:23,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:24,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079227258] [2022-11-19 07:03:24,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079227258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1513006172] [2022-11-19 07:03:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:24,844 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:24,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:03:24,845 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:03:24,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-19 07:03:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:25,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:03:25,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:03:25,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:03:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1513006172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418878563] [2022-11-19 07:03:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:26,087 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:26,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-19 07:03:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:03:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:03:26,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:03:26,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418878563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:26,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:03:26,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 5, 5, 5, 5] total 25 [2022-11-19 07:03:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571701964] [2022-11-19 07:03:26,536 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:26,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:03:26,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:26,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:03:26,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:03:26,537 INFO L87 Difference]: Start difference. First operand 23686 states and 111068 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 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 07:03:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:40,037 INFO L93 Difference]: Finished difference Result 30128 states and 135679 transitions. [2022-11-19 07:03:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:03:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 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 10 [2022-11-19 07:03:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:40,186 INFO L225 Difference]: With dead ends: 30128 [2022-11-19 07:03:40,186 INFO L226 Difference]: Without dead ends: 30128 [2022-11-19 07:03:40,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:03:40,187 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 147 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:40,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 96 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2128 Invalid, 0 Unknown, 8 Unchecked, 11.6s Time] [2022-11-19 07:03:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30128 states. [2022-11-19 07:03:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30128 to 23695. [2022-11-19 07:03:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23695 states, 21296 states have (on average 5.216190833959429) internal successors, (111084), 23694 states have internal predecessors, (111084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23695 states to 23695 states and 111084 transitions. [2022-11-19 07:03:41,016 INFO L78 Accepts]: Start accepts. Automaton has 23695 states and 111084 transitions. Word has length 10 [2022-11-19 07:03:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:41,016 INFO L495 AbstractCegarLoop]: Abstraction has 23695 states and 111084 transitions. [2022-11-19 07:03:41,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 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 07:03:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 23695 states and 111084 transitions. [2022-11-19 07:03:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:03:41,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:41,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:41,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:41,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:41,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:41,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:41,618 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:03:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1967399537, now seen corresponding path program 2 times [2022-11-19 07:03:41,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:41,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683409303] [2022-11-19 07:03:41,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:03:41,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:03:41,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:41,620 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:03:41,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 07:03:42,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:03:42,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:42,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:03:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:42,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:42,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:42,163 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:03:42,164 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 07:03:42,193 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:03:42,194 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 07:03:42,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:42,266 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 07:03:42,323 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:03:42,324 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 07:03:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:42,425 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 07:03:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:42,501 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 07:03:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:03:42,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:03:45,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683409303] [2022-11-19 07:03:45,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683409303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:45,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713776323] [2022-11-19 07:03:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:03:45,780 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:03:45,783 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:03:45,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-19 07:03:46,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:03:46,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717168423] [2022-11-19 07:03:46,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:03:46,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:46,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:46,343 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:46,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 1 [2022-11-19 07:03:46,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-19 07:03:46,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:03:46,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:03:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:46,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:46,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:46,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:46,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:46,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:46,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-19 07:03:46,890 INFO L321 Elim1Store]: treesize reduction 135, result has 14.0 percent of original size [2022-11-19 07:03:46,891 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 8 case distinctions, treesize of input 55 treesize of output 62 [2022-11-19 07:03:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:47,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 07:03:47,251 INFO L321 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2022-11-19 07:03:47,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 75 [2022-11-19 07:03:47,463 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:03:47,463 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 07:03:47,577 INFO L321 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2022-11-19 07:03:47,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 56 [2022-11-19 07:03:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:47,817 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:03:47,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-19 07:03:48,014 INFO L321 Elim1Store]: treesize reduction 150, result has 27.2 percent of original size [2022-11-19 07:03:48,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 47 treesize of output 91 [2022-11-19 07:03:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:49,988 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 07:03:49,988 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 176 treesize of output 183 [2022-11-19 07:03:54,108 INFO L321 Elim1Store]: treesize reduction 6, result has 98.9 percent of original size [2022-11-19 07:03:54,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 180 treesize of output 702 [2022-11-19 07:04:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:11,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:18,351 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#t1~0#1.offset|))) (and (or (bvule |c_ULTIMATE.start_main_~#t1~0#1.offset| .cse0) (forall ((v_~mult~0.base_253 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_214| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_215| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| v_~mult~0.base_253 (_ bv1 1)))) (or (not (= (select (store .cse1 |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_215| (_ bv1 1)) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_214|) (_ bv0 1))) (not (= (_ bv0 1) (select .cse1 |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_215|))))))) (forall ((v_~maxA~0_142 (_ BitVec 32))) (or (bvslt (_ bv2 32) v_~maxA~0_142) (forall ((v_~mult~0.base_253 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_215| (_ BitVec 32))) (let ((.cse2 (store |c_#valid| v_~mult~0.base_253 (_ bv1 1)))) (or (forall ((v_ArrVal_2638 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_214| (_ BitVec 32))) (or (not (= (select (store .cse2 |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_215| (_ bv1 1)) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_214|) (_ bv0 1))) (forall ((v_ArrVal_2640 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_~mult~0.base_253 (bvmul v_~maxA~0_142 (_ bv4 32))) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_215| v_ArrVal_2638) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_214| v_ArrVal_2640) |c_ULTIMATE.start_main_~#t1~0#1.base|))))) (not (= (_ bv0 1) (select .cse2 |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_215|)))))) (not (bvslt (_ bv1 32) v_~maxA~0_142)))))) is different from false [2022-11-19 07:04:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:27,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717168423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:27,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-19 07:04:27,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6, 7] total 22 [2022-11-19 07:04:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873710326] [2022-11-19 07:04:27,507 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:04:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:04:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:04:27,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=4, NotChecked=42, Total=552 [2022-11-19 07:04:27,508 INFO L87 Difference]: Start difference. First operand 23695 states and 111084 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:32,197 INFO L93 Difference]: Finished difference Result 23703 states and 111096 transitions. [2022-11-19 07:04:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:04:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:04:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:32,332 INFO L225 Difference]: With dead ends: 23703 [2022-11-19 07:04:32,332 INFO L226 Difference]: Without dead ends: 23703 [2022-11-19 07:04:32,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=4, NotChecked=58, Total=992 [2022-11-19 07:04:32,333 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 908 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:32,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 66 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 908 Unchecked, 2.0s Time] [2022-11-19 07:04:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23703 states. [2022-11-19 07:04:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23703 to 23699. [2022-11-19 07:04:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23699 states, 21300 states have (on average 5.215539906103286) internal successors, (111091), 23698 states have internal predecessors, (111091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23699 states to 23699 states and 111091 transitions. [2022-11-19 07:04:33,239 INFO L78 Accepts]: Start accepts. Automaton has 23699 states and 111091 transitions. Word has length 10 [2022-11-19 07:04:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:33,239 INFO L495 AbstractCegarLoop]: Abstraction has 23699 states and 111091 transitions. [2022-11-19 07:04:33,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 23699 states and 111091 transitions. [2022-11-19 07:04:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:04:33,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:33,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:33,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:33,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:33,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:04:33,649 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:04:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:33,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1967451105, now seen corresponding path program 1 times [2022-11-19 07:04:33,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:33,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033008168] [2022-11-19 07:04:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:33,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:04:33,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:33,651 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:04:33,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:34,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:04:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:34,142 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 07:04:34,142 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 07:04:34,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:34,251 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 07:04:34,321 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:04:34,322 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 24 [2022-11-19 07:04:34,379 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:04:34,380 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 07:04:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:34,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:34,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033008168] [2022-11-19 07:04:34,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033008168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:34,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:34,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:04:34,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235146342] [2022-11-19 07:04:34,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:34,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:04:34,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:04:34,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:04:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:34,498 INFO L87 Difference]: Start difference. First operand 23699 states and 111091 transitions. Second operand has 6 states, 5 states have (on average 2.0) 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 07:04:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:35,340 INFO L93 Difference]: Finished difference Result 23706 states and 111104 transitions. [2022-11-19 07:04:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:04:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) 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 10 [2022-11-19 07:04:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:35,757 INFO L225 Difference]: With dead ends: 23706 [2022-11-19 07:04:35,757 INFO L226 Difference]: Without dead ends: 23706 [2022-11-19 07:04:35,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:35,765 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:35,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 78 Unchecked, 0.7s Time] [2022-11-19 07:04:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23706 states. [2022-11-19 07:04:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23706 to 23702. [2022-11-19 07:04:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23702 states, 21303 states have (on average 5.215180960428109) internal successors, (111099), 23701 states have internal predecessors, (111099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23702 states to 23702 states and 111099 transitions. [2022-11-19 07:04:36,650 INFO L78 Accepts]: Start accepts. Automaton has 23702 states and 111099 transitions. Word has length 10 [2022-11-19 07:04:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:36,650 INFO L495 AbstractCegarLoop]: Abstraction has 23702 states and 111099 transitions. [2022-11-19 07:04:36,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) 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 07:04:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 23702 states and 111099 transitions. [2022-11-19 07:04:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:04:36,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:36,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:36,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:36,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:04:36,852 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:04:36,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2017007942, now seen corresponding path program 1 times [2022-11-19 07:04:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:36,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887602830] [2022-11-19 07:04:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:36,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:04:36,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:36,855 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:04:36,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:04:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:37,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:37,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:37,382 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 07:04:37,382 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 07:04:37,391 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 07:04:37,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:37,447 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 07:04:37,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:37,514 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 07:04:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:37,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:37,612 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887602830] [2022-11-19 07:04:37,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887602830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:37,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:37,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:04:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810678112] [2022-11-19 07:04:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:37,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:04:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:04:37,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:04:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:04:37,614 INFO L87 Difference]: Start difference. First operand 23702 states and 111099 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 07:04:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:38,654 INFO L93 Difference]: Finished difference Result 23385 states and 109093 transitions. [2022-11-19 07:04:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:38,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:04:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:38,790 INFO L225 Difference]: With dead ends: 23385 [2022-11-19 07:04:38,791 INFO L226 Difference]: Without dead ends: 23385 [2022-11-19 07:04:38,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:04:38,791 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:38,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 3 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 1 Unchecked, 0.8s Time] [2022-11-19 07:04:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23385 states. [2022-11-19 07:04:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23385 to 23385. [2022-11-19 07:04:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23385 states, 21093 states have (on average 5.172000189636372) internal successors, (109093), 23384 states have internal predecessors, (109093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23385 states to 23385 states and 109093 transitions. [2022-11-19 07:04:40,099 INFO L78 Accepts]: Start accepts. Automaton has 23385 states and 109093 transitions. Word has length 10 [2022-11-19 07:04:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:40,099 INFO L495 AbstractCegarLoop]: Abstraction has 23385 states and 109093 transitions. [2022-11-19 07:04:40,099 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 07:04:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 23385 states and 109093 transitions. [2022-11-19 07:04:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:04:40,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:40,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:40,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:40,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:04:40,308 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:04:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2017007941, now seen corresponding path program 1 times [2022-11-19 07:04:40,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:40,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792515418] [2022-11-19 07:04:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:40,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:04:40,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:40,311 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:04:40,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:40,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:04:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:40,867 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 07:04:40,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-19 07:04:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,934 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 07:04:40,997 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:04:40,997 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 07:04:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:41,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:41,074 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:41,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792515418] [2022-11-19 07:04:41,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792515418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:41,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:41,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:04:41,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282539380] [2022-11-19 07:04:41,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:41,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:04:41,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:04:41,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:04:41,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:04:41,077 INFO L87 Difference]: Start difference. First operand 23385 states and 109093 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 07:04:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:42,090 INFO L93 Difference]: Finished difference Result 23390 states and 109123 transitions. [2022-11-19 07:04:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:04:42,091 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 10 [2022-11-19 07:04:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:42,227 INFO L225 Difference]: With dead ends: 23390 [2022-11-19 07:04:42,228 INFO L226 Difference]: Without dead ends: 23390 [2022-11-19 07:04:42,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:04:42,228 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:42,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 71 Unchecked, 0.8s Time] [2022-11-19 07:04:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23390 states. [2022-11-19 07:04:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23390 to 23390. [2022-11-19 07:04:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23390 states, 21098 states have (on average 5.172196416721964) internal successors, (109123), 23389 states have internal predecessors, (109123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23390 states to 23390 states and 109123 transitions. [2022-11-19 07:04:43,212 INFO L78 Accepts]: Start accepts. Automaton has 23390 states and 109123 transitions. Word has length 10 [2022-11-19 07:04:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:43,212 INFO L495 AbstractCegarLoop]: Abstraction has 23390 states and 109123 transitions. [2022-11-19 07:04:43,212 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 07:04:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23390 states and 109123 transitions. [2022-11-19 07:04:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:04:43,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:43,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:43,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:43,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:04:43,414 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:04:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2017013582, now seen corresponding path program 1 times [2022-11-19 07:04:43,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:43,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721822768] [2022-11-19 07:04:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:43,416 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 07:04:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:43,417 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:04:43,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:04:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:43,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:04:43,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:44,105 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:04:44,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:04:44,312 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:04:44,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:04:44,510 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:04:44,510 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 07:04:44,530 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 16 [2022-11-19 07:04:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:44,912 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 14 treesize of output 16 [2022-11-19 07:04:44,941 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 07:04:44,941 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 07:04:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:04:45,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:04:50,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:50,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721822768] [2022-11-19 07:04:50,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721822768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:50,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825267541] [2022-11-19 07:04:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:50,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:04:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:04:50,904 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:04:50,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-19 07:04:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:04:51,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:51,863 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:04:51,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:04:52,062 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:04:52,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:04:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:52,321 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 16 [2022-11-19 07:04:52,363 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:04:52,363 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 07:04:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:52,485 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 16 [2022-11-19 07:04:52,510 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:04:52,510 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 07:04:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:04:52,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:03,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825267541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:03,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733097570] [2022-11-19 07:05:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:03,854 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:03,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-19 07:05:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:04,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:05:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:04,423 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:05:04,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:05:04,632 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:05:04,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:05:04,794 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:04,794 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 07:05:04,809 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 16 [2022-11-19 07:05:04,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:04,976 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 16 [2022-11-19 07:05:05,006 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:05:05,007 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 07:05:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:05,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:10,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733097570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:10,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:05:10,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 07:05:10,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513488850] [2022-11-19 07:05:10,211 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:10,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:05:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:05:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:05:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=211, Unknown=3, NotChecked=0, Total=272 [2022-11-19 07:05:10,213 INFO L87 Difference]: Start difference. First operand 23390 states and 109123 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 07:05:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:13,027 INFO L93 Difference]: Finished difference Result 34864 states and 158840 transitions. [2022-11-19 07:05:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:05:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 10 [2022-11-19 07:05:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:13,236 INFO L225 Difference]: With dead ends: 34864 [2022-11-19 07:05:13,236 INFO L226 Difference]: Without dead ends: 34864 [2022-11-19 07:05:13,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=63, Invalid=240, Unknown=3, NotChecked=0, Total=306 [2022-11-19 07:05:13,237 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:13,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 47 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 248 Unchecked, 2.4s Time] [2022-11-19 07:05:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34864 states. [2022-11-19 07:05:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34864 to 23392. [2022-11-19 07:05:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23392 states, 21100 states have (on average 5.1719905213270145) internal successors, (109129), 23391 states have internal predecessors, (109129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23392 states to 23392 states and 109129 transitions. [2022-11-19 07:05:14,235 INFO L78 Accepts]: Start accepts. Automaton has 23392 states and 109129 transitions. Word has length 10 [2022-11-19 07:05:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:14,235 INFO L495 AbstractCegarLoop]: Abstraction has 23392 states and 109129 transitions. [2022-11-19 07:05:14,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 07:05:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 23392 states and 109129 transitions. [2022-11-19 07:05:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:05:14,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:14,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:14,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:14,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:14,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:14,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:14,839 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:05:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2017486952, now seen corresponding path program 2 times [2022-11-19 07:05:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:05:14,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19581763] [2022-11-19 07:05:14,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:05:14,841 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 07:05:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:05:14,842 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:05:14,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:15,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:05:15,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:05:15,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:05:15,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:15,761 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:05:15,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:05:15,972 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:05:15,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:05:16,131 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:05:16,131 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 07:05:16,189 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:16,189 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 07:05:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:16,300 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 14 treesize of output 16 [2022-11-19 07:05:16,338 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 07:05:16,338 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 07:05:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:16,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:05:16,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:05:16,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19581763] [2022-11-19 07:05:16,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19581763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:16,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:16,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:05:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255903089] [2022-11-19 07:05:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:05:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:05:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:05:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:05:16,532 INFO L87 Difference]: Start difference. First operand 23392 states and 109129 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 07:05:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:18,307 INFO L93 Difference]: Finished difference Result 23399 states and 109158 transitions. [2022-11-19 07:05:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:05:18,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 10 [2022-11-19 07:05:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:18,443 INFO L225 Difference]: With dead ends: 23399 [2022-11-19 07:05:18,444 INFO L226 Difference]: Without dead ends: 23399 [2022-11-19 07:05:18,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:05:18,444 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:18,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 79 Unchecked, 1.4s Time] [2022-11-19 07:05:18,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23399 states. [2022-11-19 07:05:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23399 to 23397. [2022-11-19 07:05:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23397 states, 21105 states have (on average 5.171760246387112) internal successors, (109150), 23396 states have internal predecessors, (109150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23397 states to 23397 states and 109150 transitions. [2022-11-19 07:05:19,455 INFO L78 Accepts]: Start accepts. Automaton has 23397 states and 109150 transitions. Word has length 10 [2022-11-19 07:05:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:19,455 INFO L495 AbstractCegarLoop]: Abstraction has 23397 states and 109150 transitions. [2022-11-19 07:05:19,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 07:05:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 23397 states and 109150 transitions. [2022-11-19 07:05:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:05:19,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:19,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:19,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:19,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:05:19,656 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:05:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2017486093, now seen corresponding path program 1 times [2022-11-19 07:05:19,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:05:19,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663731282] [2022-11-19 07:05:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:05:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:05:19,659 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:05:19,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:20,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:05:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:20,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:05:20,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:05:20,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663731282] [2022-11-19 07:05:20,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663731282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:20,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:20,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:05:20,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938925537] [2022-11-19 07:05:20,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:20,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:20,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:05:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:20,018 INFO L87 Difference]: Start difference. First operand 23397 states and 109150 transitions. Second operand has 3 states, 2 states have (on average 5.0) 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 07:05:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:21,921 INFO L93 Difference]: Finished difference Result 27105 states and 132027 transitions. [2022-11-19 07:05:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) 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 10 [2022-11-19 07:05:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:22,082 INFO L225 Difference]: With dead ends: 27105 [2022-11-19 07:05:22,083 INFO L226 Difference]: Without dead ends: 27105 [2022-11-19 07:05:22,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 07:05:22,084 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:22,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 8 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 07:05:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27105 states. [2022-11-19 07:05:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27105 to 24633. [2022-11-19 07:05:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24633 states, 22341 states have (on average 5.1160198737746745) internal successors, (114297), 24632 states have internal predecessors, (114297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24633 states to 24633 states and 114297 transitions. [2022-11-19 07:05:23,214 INFO L78 Accepts]: Start accepts. Automaton has 24633 states and 114297 transitions. Word has length 10 [2022-11-19 07:05:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:23,214 INFO L495 AbstractCegarLoop]: Abstraction has 24633 states and 114297 transitions. [2022-11-19 07:05:23,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) 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 07:05:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 24633 states and 114297 transitions. [2022-11-19 07:05:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:05:23,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:23,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:23,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:23,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:05:23,418 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:05:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash -856117496, now seen corresponding path program 2 times [2022-11-19 07:05:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:05:23,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429118784] [2022-11-19 07:05:23,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:05:23,420 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 07:05:23,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:05:23,421 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:05:23,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:23,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:05:23,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:05:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:05:23,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:24,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:24,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:05:24,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429118784] [2022-11-19 07:05:24,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429118784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:24,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1072463129] [2022-11-19 07:05:24,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:05:24,273 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:05:24,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:05:24,274 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:05:24,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-19 07:05:25,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:05:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:05:25,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:05:25,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:25,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:25,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1072463129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:25,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692170729] [2022-11-19 07:05:25,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:05:25,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:25,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:25,592 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:25,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-19 07:05:26,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:05:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:05:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:05:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:26,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:05:26,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692170729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:26,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:05:26,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2022-11-19 07:05:26,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003834259] [2022-11-19 07:05:26,145 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:26,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:05:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:05:26,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:05:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:05:26,146 INFO L87 Difference]: Start difference. First operand 24633 states and 114297 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 07:05:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:32,874 INFO L93 Difference]: Finished difference Result 50515 states and 222747 transitions. [2022-11-19 07:05:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:05:32,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 11 [2022-11-19 07:05:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:33,199 INFO L225 Difference]: With dead ends: 50515 [2022-11-19 07:05:33,199 INFO L226 Difference]: Without dead ends: 50515 [2022-11-19 07:05:33,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:05:33,200 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 516 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:33,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 51 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-19 07:05:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50515 states. [2022-11-19 07:05:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50515 to 24643. [2022-11-19 07:05:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24643 states, 22351 states have (on average 5.113551966354973) internal successors, (114293), 24642 states have internal predecessors, (114293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24643 states to 24643 states and 114293 transitions. [2022-11-19 07:05:34,518 INFO L78 Accepts]: Start accepts. Automaton has 24643 states and 114293 transitions. Word has length 11 [2022-11-19 07:05:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:34,518 INFO L495 AbstractCegarLoop]: Abstraction has 24643 states and 114293 transitions. [2022-11-19 07:05:34,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 07:05:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 24643 states and 114293 transitions. [2022-11-19 07:05:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:05:34,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:34,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:34,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:34,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:34,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:35,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:05:35,120 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:05:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash -856169064, now seen corresponding path program 1 times [2022-11-19 07:05:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:05:35,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488020503] [2022-11-19 07:05:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:35,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:05:35,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:05:35,123 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:05:35,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:05:35,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:35,958 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 07:05:35,958 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 07:05:36,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:36,649 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-19 07:05:36,650 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 07:05:36,968 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-19 07:05:36,968 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 40 [2022-11-19 07:05:37,349 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-19 07:05:37,349 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 48 treesize of output 77 [2022-11-19 07:05:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:05:38,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:05:38,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:05:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488020503] [2022-11-19 07:05:38,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488020503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:38,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:38,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:05:38,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832401578] [2022-11-19 07:05:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:38,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:05:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:05:38,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:05:38,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:05:38,758 INFO L87 Difference]: Start difference. First operand 24643 states and 114293 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 07:05:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:39,747 INFO L93 Difference]: Finished difference Result 24642 states and 114288 transitions. [2022-11-19 07:05:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:05:39,748 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 11 [2022-11-19 07:05:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:39,885 INFO L225 Difference]: With dead ends: 24642 [2022-11-19 07:05:39,885 INFO L226 Difference]: Without dead ends: 24642 [2022-11-19 07:05:39,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:05:39,886 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:39,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 77 Unchecked, 0.8s Time] [2022-11-19 07:05:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24642 states. [2022-11-19 07:05:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24642 to 24642. [2022-11-19 07:05:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24642 states, 22350 states have (on average 5.1135570469798655) internal successors, (114288), 24641 states have internal predecessors, (114288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24642 states to 24642 states and 114288 transitions. [2022-11-19 07:05:41,168 INFO L78 Accepts]: Start accepts. Automaton has 24642 states and 114288 transitions. Word has length 11 [2022-11-19 07:05:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:41,168 INFO L495 AbstractCegarLoop]: Abstraction has 24642 states and 114288 transitions. [2022-11-19 07:05:41,169 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 07:05:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 24642 states and 114288 transitions. [2022-11-19 07:05:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:05:41,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:41,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:41,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:41,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:05:41,370 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:05:41,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1897246737, now seen corresponding path program 1 times [2022-11-19 07:05:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:05:41,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805941386] [2022-11-19 07:05:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:41,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:05:41,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:05:41,374 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:05:41,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:05:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:41,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:05:41,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:42,176 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:05:42,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:05:42,393 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:05:42,394 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 15 treesize of output 50 [2022-11-19 07:05:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:42,590 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 16 [2022-11-19 07:05:42,625 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:42,625 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 07:05:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:42,722 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 16 [2022-11-19 07:05:42,750 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:05:42,750 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 07:05:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:42,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:48,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:05:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805941386] [2022-11-19 07:05:48,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805941386] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133216481] [2022-11-19 07:05:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:48,216 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:05:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:05:48,217 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:05:48,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-19 07:05:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:49,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:05:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:49,272 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:05:49,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:05:49,486 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:05:49,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:05:49,812 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:49,813 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 07:05:49,825 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 14 treesize of output 16 [2022-11-19 07:05:49,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:49,910 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 16 [2022-11-19 07:05:49,926 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:05:49,927 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 07:05:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:50,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:53,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1133216481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006317122] [2022-11-19 07:05:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:53,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:53,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:53,556 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:53,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-19 07:05:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:05:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:54,354 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:05:54,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:05:54,563 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:05:54,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:05:54,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:54,674 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 14 treesize of output 16 [2022-11-19 07:05:54,726 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:54,726 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 07:05:54,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:54,894 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 14 treesize of output 16 [2022-11-19 07:05:54,933 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 07:05:54,933 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 07:05:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:55,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:06:04,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006317122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:06:04,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:06:04,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-19 07:06:04,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266595386] [2022-11-19 07:06:04,407 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:06:04,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:06:04,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:06:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:06:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=237, Unknown=5, NotChecked=0, Total=306 [2022-11-19 07:06:04,408 INFO L87 Difference]: Start difference. First operand 24642 states and 114288 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:06,114 INFO L93 Difference]: Finished difference Result 24674 states and 114404 transitions. [2022-11-19 07:06:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:06:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:06:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:06,260 INFO L225 Difference]: With dead ends: 24674 [2022-11-19 07:06:06,260 INFO L226 Difference]: Without dead ends: 24674 [2022-11-19 07:06:06,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=89, Invalid=326, Unknown=5, NotChecked=0, Total=420 [2022-11-19 07:06:06,261 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:06,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 42 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 155 Unchecked, 1.1s Time] [2022-11-19 07:06:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24674 states. [2022-11-19 07:06:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24674 to 24646. [2022-11-19 07:06:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24646 states, 22354 states have (on average 5.1136261966538425) internal successors, (114310), 24645 states have internal predecessors, (114310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24646 states to 24646 states and 114310 transitions. [2022-11-19 07:06:07,477 INFO L78 Accepts]: Start accepts. Automaton has 24646 states and 114310 transitions. Word has length 11 [2022-11-19 07:06:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:07,477 INFO L495 AbstractCegarLoop]: Abstraction has 24646 states and 114310 transitions. [2022-11-19 07:06:07,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 24646 states and 114310 transitions. [2022-11-19 07:06:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:06:07,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:07,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:07,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:07,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-19 07:06:07,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-19 07:06:08,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:06:08,083 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:06:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1897248548, now seen corresponding path program 1 times [2022-11-19 07:06:08,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:06:08,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505066840] [2022-11-19 07:06:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:08,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:06:08,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:06:08,086 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:06:08,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:06:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:08,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:06:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:06:08,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:06:09,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:06:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505066840] [2022-11-19 07:06:09,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505066840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:06:09,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [666138486] [2022-11-19 07:06:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:09,024 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:06:09,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:06:09,025 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:06:09,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-19 07:06:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:06:09,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:06:09,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:06:09,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [666138486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:06:09,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016946781] [2022-11-19 07:06:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:09,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:09,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:09,860 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:09,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-19 07:06:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:10,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:06:10,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:06:10,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:06:10,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016946781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:06:10,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:06:10,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-19 07:06:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257784661] [2022-11-19 07:06:10,374 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:06:10,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:06:10,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:06:10,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:06:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:06:10,376 INFO L87 Difference]: Start difference. First operand 24646 states and 114310 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 07:06:14,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:14,595 INFO L93 Difference]: Finished difference Result 25914 states and 118603 transitions. [2022-11-19 07:06:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:06:14,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 11 [2022-11-19 07:06:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:14,722 INFO L225 Difference]: With dead ends: 25914 [2022-11-19 07:06:14,723 INFO L226 Difference]: Without dead ends: 25914 [2022-11-19 07:06:14,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:06:14,723 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 434 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:14,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 27 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 647 Invalid, 0 Unknown, 170 Unchecked, 3.4s Time] [2022-11-19 07:06:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25914 states. [2022-11-19 07:06:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25914 to 25490. [2022-11-19 07:06:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25490 states, 23198 states have (on average 5.062807138546426) internal successors, (117447), 25489 states have internal predecessors, (117447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25490 states to 25490 states and 117447 transitions. [2022-11-19 07:06:15,582 INFO L78 Accepts]: Start accepts. Automaton has 25490 states and 117447 transitions. Word has length 11 [2022-11-19 07:06:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:15,583 INFO L495 AbstractCegarLoop]: Abstraction has 25490 states and 117447 transitions. [2022-11-19 07:06:15,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 07:06:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 25490 states and 117447 transitions. [2022-11-19 07:06:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:06:15,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:15,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:15,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:06:15,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:15,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:16,193 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:06:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1897086777, now seen corresponding path program 2 times [2022-11-19 07:06:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:06:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221876554] [2022-11-19 07:06:16,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:06:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:06:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:06:16,196 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:06:16,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:06:16,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:06:16,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:06:16,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:06:16,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:16,751 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:06:16,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:06:16,931 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:06:16,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:06:17,069 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:06:17,069 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 07:06:17,119 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:06:17,119 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 07:06:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:17,207 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 14 treesize of output 16 [2022-11-19 07:06:17,243 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 07:06:17,243 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 07:06:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:06:17,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:17,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:06:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221876554] [2022-11-19 07:06:17,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221876554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:17,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:06:17,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:06:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914972491] [2022-11-19 07:06:17,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:17,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:06:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:06:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:06:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:17,415 INFO L87 Difference]: Start difference. First operand 25490 states and 117447 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 07:06:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:19,253 INFO L93 Difference]: Finished difference Result 25505 states and 117533 transitions. [2022-11-19 07:06:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:06:19,254 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 11 [2022-11-19 07:06:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:19,380 INFO L225 Difference]: With dead ends: 25505 [2022-11-19 07:06:19,380 INFO L226 Difference]: Without dead ends: 25505 [2022-11-19 07:06:19,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:06:19,381 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:19,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 81 Unchecked, 1.2s Time] [2022-11-19 07:06:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25505 states. [2022-11-19 07:06:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25505 to 25499. [2022-11-19 07:06:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25499 states, 23207 states have (on average 5.063213685525919) internal successors, (117502), 25498 states have internal predecessors, (117502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25499 states to 25499 states and 117502 transitions. [2022-11-19 07:06:20,247 INFO L78 Accepts]: Start accepts. Automaton has 25499 states and 117502 transitions. Word has length 11 [2022-11-19 07:06:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:20,247 INFO L495 AbstractCegarLoop]: Abstraction has 25499 states and 117502 transitions. [2022-11-19 07:06:20,248 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 07:06:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25499 states and 117502 transitions. [2022-11-19 07:06:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:06:20,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:20,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:20,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:06:20,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:06:20,449 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:06:20,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:20,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1882412307, now seen corresponding path program 3 times [2022-11-19 07:06:20,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:06:20,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146020265] [2022-11-19 07:06:20,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:06:20,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:06:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:06:20,452 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:06:20,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:06:20,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:06:20,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:06:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:06:20,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:21,018 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:06:21,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:06:21,213 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:06:21,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 07:06:21,335 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:06:21,335 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 07:06:21,361 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 14 treesize of output 16 [2022-11-19 07:06:21,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:21,450 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 14 treesize of output 16 [2022-11-19 07:06:21,492 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 07:06:21,492 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 07:06:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:06:21,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:21,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:06:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146020265] [2022-11-19 07:06:21,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146020265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:21,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:06:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:06:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731113379] [2022-11-19 07:06:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:06:21,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:06:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:06:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:06:21,698 INFO L87 Difference]: Start difference. First operand 25499 states and 117502 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 07:06:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:23,719 INFO L93 Difference]: Finished difference Result 25509 states and 117570 transitions. [2022-11-19 07:06:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:06:23,720 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 11 [2022-11-19 07:06:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:23,854 INFO L225 Difference]: With dead ends: 25509 [2022-11-19 07:06:23,854 INFO L226 Difference]: Without dead ends: 25509 [2022-11-19 07:06:23,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:06:23,854 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:23,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 239 Invalid, 0 Unknown, 81 Unchecked, 1.6s Time] [2022-11-19 07:06:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25509 states. [2022-11-19 07:06:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25509 to 25494. [2022-11-19 07:06:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25494 states, 23202 states have (on average 5.0634428066545984) internal successors, (117482), 25493 states have internal predecessors, (117482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25494 states to 25494 states and 117482 transitions. [2022-11-19 07:06:24,793 INFO L78 Accepts]: Start accepts. Automaton has 25494 states and 117482 transitions. Word has length 11 [2022-11-19 07:06:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:24,793 INFO L495 AbstractCegarLoop]: Abstraction has 25494 states and 117482 transitions. [2022-11-19 07:06:24,793 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 07:06:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 25494 states and 117482 transitions. [2022-11-19 07:06:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:06:24,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:24,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:24,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:06:24,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:06:24,998 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:06:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1882194368, now seen corresponding path program 1 times [2022-11-19 07:06:24,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:06:24,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397307726] [2022-11-19 07:06:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:24,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:06:25,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:06:25,001 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:06:25,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:06:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:06:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:25,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:25,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 35 [2022-11-19 07:06:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:06:25,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:25,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:06:25,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397307726] [2022-11-19 07:06:25,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397307726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:25,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:06:25,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:06:25,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537415144] [2022-11-19 07:06:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:25,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:06:25,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:06:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:06:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:06:25,620 INFO L87 Difference]: Start difference. First operand 25494 states and 117482 transitions. Second operand has 6 states, 5 states have (on average 2.2) 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 07:06:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:30,662 INFO L93 Difference]: Finished difference Result 27498 states and 127807 transitions. [2022-11-19 07:06:30,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:06:30,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) 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 11 [2022-11-19 07:06:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:30,809 INFO L225 Difference]: With dead ends: 27498 [2022-11-19 07:06:30,809 INFO L226 Difference]: Without dead ends: 27498 [2022-11-19 07:06:30,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:06:30,810 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 239 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:30,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 27 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-19 07:06:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27498 states. [2022-11-19 07:06:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27498 to 23791. [2022-11-19 07:06:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23791 states, 21499 states have (on average 5.026373319689288) internal successors, (108062), 23790 states have internal predecessors, (108062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23791 states to 23791 states and 108062 transitions. [2022-11-19 07:06:31,854 INFO L78 Accepts]: Start accepts. Automaton has 23791 states and 108062 transitions. Word has length 11 [2022-11-19 07:06:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:31,854 INFO L495 AbstractCegarLoop]: Abstraction has 23791 states and 108062 transitions. [2022-11-19 07:06:31,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) 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 07:06:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 23791 states and 108062 transitions. [2022-11-19 07:06:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:06:31,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:31,855 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2022-11-19 07:06:31,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:32,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.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 07:06:32,058 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:06:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2053244705, now seen corresponding path program 2 times [2022-11-19 07:06:32,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:06:32,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869151680] [2022-11-19 07:06:32,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:06:32,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.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 07:06:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:06:32,060 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:06:32,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:06:32,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:06:32,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:06:32,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:06:32,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:32,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:06:32,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:06:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:32,531 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 14 treesize of output 16 [2022-11-19 07:06:32,550 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:06:32,550 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 07:06:32,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:32,650 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 16 [2022-11-19 07:06:32,664 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:06:32,665 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 07:06:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:33,037 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 21 treesize of output 21 [2022-11-19 07:06:33,064 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:06:33,065 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 07:06:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:33,222 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 21 treesize of output 21 [2022-11-19 07:06:33,238 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:06:33,238 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 07:06:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:06:33,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:33,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:33,703 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 50 treesize of output 74 [2022-11-19 07:06:36,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:36,673 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 56 treesize of output 80 [2022-11-19 07:06:40,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:40,516 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 90 treesize of output 114 [2022-11-19 07:06:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:06:44,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:06:44,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869151680] [2022-11-19 07:06:44,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869151680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:06:44,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2026368599] [2022-11-19 07:06:44,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:06:44,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:06:44,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:06:44,634 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:06:44,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-19 07:06:45,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:06:45,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:06:45,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:06:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:45,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:06:45,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:06:45,555 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:06:45,555 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 07:06:45,564 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 16 [2022-11-19 07:06:45,720 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:06:45,721 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 07:06:45,734 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 16 [2022-11-19 07:06:46,011 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:06:46,012 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 07:06:46,030 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 16 [2022-11-19 07:06:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:46,692 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 16 [2022-11-19 07:06:46,726 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:06:46,727 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 07:06:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:06:46,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:47,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:47,044 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 50 treesize of output 74 [2022-11-19 07:06:50,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:50,061 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 56 treesize of output 80 [2022-11-19 07:06:56,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:56,072 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 62 treesize of output 86 [2022-11-19 07:07:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:05,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2026368599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:05,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645055149] [2022-11-19 07:07:05,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:07:05,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:05,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:05,322 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:07:05,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-19 07:07:05,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:07:05,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:07:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:07:05,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:05,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 07:07:05,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:07:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:05,784 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 16 [2022-11-19 07:07:05,819 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:07:05,819 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 07:07:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:05,864 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 16 [2022-11-19 07:07:05,879 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:07:05,879 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 07:07:05,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:05,928 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 14 treesize of output 16 [2022-11-19 07:07:05,966 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:07:05,966 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 07:07:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:07:06,013 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 16 [2022-11-19 07:07:06,026 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:07:06,027 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 07:07:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:06,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:12,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:07:12,010 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 56 treesize of output 80 [2022-11-19 07:07:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:34,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645055149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:34,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:07:34,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 7, 8] total 27 [2022-11-19 07:07:34,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263524506] [2022-11-19 07:07:34,105 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:07:34,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:07:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:07:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:07:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=577, Unknown=11, NotChecked=0, Total=756 [2022-11-19 07:07:34,106 INFO L87 Difference]: Start difference. First operand 23791 states and 108062 transitions. Second operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:07:50,542 WARN L233 SmtUtils]: Spent 14.71s on a formula simplification. DAG size of input: 111 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:06,528 WARN L233 SmtUtils]: Spent 9.44s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:20,170 WARN L233 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 66 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:33,381 WARN L233 SmtUtils]: Spent 10.36s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:47,375 WARN L233 SmtUtils]: Spent 12.73s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:08:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:51,823 INFO L93 Difference]: Finished difference Result 83767 states and 340699 transitions. [2022-11-19 07:08:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:08:51,823 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:08:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:52,561 INFO L225 Difference]: With dead ends: 83767 [2022-11-19 07:08:52,561 INFO L226 Difference]: Without dead ends: 83767 [2022-11-19 07:08:52,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 124.8s TimeCoverageRelationStatistics Valid=306, Invalid=1011, Unknown=15, NotChecked=0, Total=1332 [2022-11-19 07:08:52,562 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1886 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1527 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:52,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1886 Valid, 171 Invalid, 3713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2176 Invalid, 0 Unknown, 1527 Unchecked, 6.7s Time] [2022-11-19 07:08:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83767 states. [2022-11-19 07:08:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83767 to 23807. [2022-11-19 07:08:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23807 states, 21515 states have (on average 5.023564954682779) internal successors, (108082), 23806 states have internal predecessors, (108082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23807 states to 23807 states and 108082 transitions. [2022-11-19 07:08:54,189 INFO L78 Accepts]: Start accepts. Automaton has 23807 states and 108082 transitions. Word has length 11 [2022-11-19 07:08:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:54,189 INFO L495 AbstractCegarLoop]: Abstraction has 23807 states and 108082 transitions. [2022-11-19 07:08:54,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:08:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 23807 states and 108082 transitions. [2022-11-19 07:08:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:08:54,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:54,190 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2022-11-19 07:08:54,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:54,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:54,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:54,791 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-11-19 07:08:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1455284653, now seen corresponding path program 1 times [2022-11-19 07:08:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:54,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148815237] [2022-11-19 07:08:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:54,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:54,793 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 07:08:54,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/mathsat -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 07:08:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:08:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:55,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:08:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:55,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:57,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:57,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148815237] [2022-11-19 07:08:57,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148815237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:57,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757629634] [2022-11-19 07:08:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:57,176 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:57,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:57,177 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:57,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-19 07:08:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:08:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:57,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:08:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:58,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:58,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1757629634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190561656] [2022-11-19 07:08:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:58,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:58,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:08:58,880 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:08:58,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848cd999-a73d-4c2b-a060-e63e805d439f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-19 07:08:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:59,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:08:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:59,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-19 07:08:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:59,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:08:59,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190561656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:59,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:08:59,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2022-11-19 07:08:59,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270998792] [2022-11-19 07:08:59,783 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:08:59,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:08:59,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:08:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:08:59,784 INFO L87 Difference]: Start difference. First operand 23807 states and 108082 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 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 07:09:05,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:07,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:09,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:11,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:13,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:15,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:17,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:21,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:23,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:25,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:26,715 WARN L539 Checker$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 07:09:28,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:30,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:10:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:10:11,398 INFO L93 Difference]: Finished difference Result 229192 states and 1040620 transitions. [2022-11-19 07:10:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:10:11,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 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 11 [2022-11-19 07:10:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted.