./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:40:24,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:40:24,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:40:24,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:40:24,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:40:24,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:40:24,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:40:24,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:40:24,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:40:24,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:40:24,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:40:24,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:40:24,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:40:24,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:40:24,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:40:24,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:40:24,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:40:24,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:40:24,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:40:24,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:40:24,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:40:24,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:40:24,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:40:24,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:40:24,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:40:24,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:40:24,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:40:24,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:40:24,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:40:24,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:40:24,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:40:24,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:40:24,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:40:24,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:40:24,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:40:24,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:40:24,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:40:24,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:40:24,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:40:24,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:40:24,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:40:24,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 20:40:24,411 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:40:24,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:40:24,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:40:24,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:40:24,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:40:24,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:40:24,414 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:40:24,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:40:24,414 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:40:24,414 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:40:24,415 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:40:24,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:40:24,415 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:40:24,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:40:24,416 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:40:24,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:40:24,416 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:40:24,416 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:40:24,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:40:24,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:40:24,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:40:24,418 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:40:24,418 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:40:24,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:40:24,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:40:24,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:40:24,419 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:40:24,419 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:40:24,419 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:40:24,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:40:24,420 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:40:24,420 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:40:24,420 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:40:24,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:40:24,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:40:24,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:40:24,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:40:24,421 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:40:24,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:40:24,421 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:40:24,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:40:24,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:40:24,422 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_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-11-20 20:40:24,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:40:24,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:40:24,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:40:24,724 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:40:24,727 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:40:24,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-11-20 20:40:27,733 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:40:27,936 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:40:27,936 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-11-20 20:40:27,943 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/data/9b7118723/bf31804bbec94df0a4752e249b758c44/FLAGf202321ef [2022-11-20 20:40:27,957 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/data/9b7118723/bf31804bbec94df0a4752e249b758c44 [2022-11-20 20:40:27,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:40:27,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:40:27,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:40:27,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:40:27,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:40:27,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:40:27" (1/1) ... [2022-11-20 20:40:27,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2674a960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:27, skipping insertion in model container [2022-11-20 20:40:27,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:40:27" (1/1) ... [2022-11-20 20:40:27,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:40:28,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:40:28,221 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-11-20 20:40:28,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:40:28,243 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 20:40:28,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2414e0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:28, skipping insertion in model container [2022-11-20 20:40:28,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:40:28,244 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 20:40:28,246 INFO L158 Benchmark]: Toolchain (without parser) took 283.77ms. Allocated memory is still 197.1MB. Free memory was 164.4MB in the beginning and 164.2MB in the end (delta: 150.2kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-20 20:40:28,247 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 121.6MB. Free memory is still 90.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:40:28,247 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.97ms. Allocated memory is still 197.1MB. Free memory was 164.4MB in the beginning and 164.2MB in the end (delta: 150.2kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-20 20:40:28,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 121.6MB. Free memory is still 90.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.97ms. Allocated memory is still 197.1MB. Free memory was 164.4MB in the beginning and 164.2MB in the end (delta: 150.2kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:40:30,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:40:30,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:40:30,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:40:30,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:40:30,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:40:30,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:40:30,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:40:30,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:40:30,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:40:30,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:40:30,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:40:30,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:40:30,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:40:30,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:40:30,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:40:30,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:40:30,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:40:30,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:40:30,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:40:30,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:40:30,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:40:30,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:40:30,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:40:30,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:40:30,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:40:30,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:40:30,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:40:30,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:40:30,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:40:30,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:40:30,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:40:30,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:40:30,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:40:30,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:40:30,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:40:30,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:40:30,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:40:30,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:40:30,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:40:30,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:40:30,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 20:40:30,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:40:30,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:40:30,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:40:30,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:40:30,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:40:30,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:40:30,575 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:40:30,575 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:40:30,575 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:40:30,575 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:40:30,576 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:40:30,577 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:40:30,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:40:30,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:40:30,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:40:30,578 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:40:30,578 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:40:30,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:40:30,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:40:30,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:40:30,579 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:40:30,579 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:40:30,579 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:40:30,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:40:30,580 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:40:30,580 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:40:30,580 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:40:30,580 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:40:30,581 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:40:30,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:40:30,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:40:30,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:40:30,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:40:30,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:40:30,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:40:30,582 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:40:30,582 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:40:30,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:40:30,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:40:30,583 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_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-11-20 20:40:30,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:40:31,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:40:31,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:40:31,017 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:40:31,018 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:40:31,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-11-20 20:40:34,103 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:40:34,299 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:40:34,300 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-11-20 20:40:34,310 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/data/aad7bbbdc/763921f3565543e88bed3221b99d1805/FLAG95d1e67ab [2022-11-20 20:40:34,341 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/data/aad7bbbdc/763921f3565543e88bed3221b99d1805 [2022-11-20 20:40:34,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:40:34,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:40:34,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:40:34,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:40:34,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:40:34,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ff1467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34, skipping insertion in model container [2022-11-20 20:40:34,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:40:34,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:40:34,637 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-11-20 20:40:34,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:40:34,687 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 20:40:34,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:40:34,730 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-11-20 20:40:34,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:40:34,745 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:40:34,783 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-11-20 20:40:34,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:40:34,813 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:40:34,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34 WrapperNode [2022-11-20 20:40:34,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:40:34,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:40:34,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:40:34,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:40:34,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,892 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 272 [2022-11-20 20:40:34,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:40:34,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:40:34,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:40:34,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:40:34,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,957 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:40:34,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:40:34,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:40:34,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:40:34,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (1/1) ... [2022-11-20 20:40:34,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:40:34,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:40:35,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:40:35,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:40:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:40:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:40:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:40:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 20:40:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 20:40:35,062 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 20:40:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 20:40:35,062 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 20:40:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 20:40:35,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 20:40:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 20:40:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:40:35,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:40:35,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:40:35,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 20:40:35,075 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:40:35,276 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:40:35,292 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:40:36,270 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:40:36,285 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:40:36,286 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 20:40:36,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:40:36 BoogieIcfgContainer [2022-11-20 20:40:36,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:40:36,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:40:36,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:40:36,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:40:36,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:40:34" (1/3) ... [2022-11-20 20:40:36,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3456f78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:40:36, skipping insertion in model container [2022-11-20 20:40:36,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:40:34" (2/3) ... [2022-11-20 20:40:36,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3456f78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:40:36, skipping insertion in model container [2022-11-20 20:40:36,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:40:36" (3/3) ... [2022-11-20 20:40:36,296 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2022-11-20 20:40:36,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:40:36,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-20 20:40:36,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:40:36,492 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 20:40:36,544 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:40:36,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 376 places, 395 transitions, 814 flow [2022-11-20 20:40:36,567 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 376 places, 395 transitions, 814 flow [2022-11-20 20:40:36,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 376 places, 395 transitions, 814 flow [2022-11-20 20:40:36,751 INFO L130 PetriNetUnfolder]: 29/392 cut-off events. [2022-11-20 20:40:36,751 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 20:40:36,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 392 events. 29/392 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 839 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 290. Up to 3 conditions per place. [2022-11-20 20:40:36,772 INFO L119 LiptonReduction]: Number of co-enabled transitions 25650 [2022-11-20 20:41:35,326 INFO L134 LiptonReduction]: Checked pairs total: 39697 [2022-11-20 20:41:35,326 INFO L136 LiptonReduction]: Total number of compositions: 467 [2022-11-20 20:41:35,335 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 83 transitions, 190 flow [2022-11-20 20:41:35,885 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:35,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:41:35,916 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;@2aecfa1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:41:35,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-20 20:41:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:41:35,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:35,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:41:35,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:41:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash 50233, now seen corresponding path program 1 times [2022-11-20 20:41:35,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:41:35,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187260349] [2022-11-20 20:41:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:35,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:35,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:41:36,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:41:36,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 20:41:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:36,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:41:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:36,357 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:41:36,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:41:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:36,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:41:36,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:41:36,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187260349] [2022-11-20 20:41:36,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187260349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:41:36,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:41:36,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:41:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239568343] [2022-11-20 20:41:36,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:41:36,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:41:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:41:36,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:41:36,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:41:36,528 INFO L87 Difference]: Start difference. First operand has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:37,200 INFO L93 Difference]: Finished difference Result 6760 states and 25219 transitions. [2022-11-20 20:41:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:41:37,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 20:41:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:37,393 INFO L225 Difference]: With dead ends: 6760 [2022-11-20 20:41:37,407 INFO L226 Difference]: Without dead ends: 6760 [2022-11-20 20:41:37,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:41:37,415 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:37,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:41:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2022-11-20 20:41:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6760. [2022-11-20 20:41:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 5260 states have (on average 4.794486692015209) internal successors, (25219), 6759 states have internal predecessors, (25219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 25219 transitions. [2022-11-20 20:41:38,100 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 25219 transitions. Word has length 2 [2022-11-20 20:41:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:38,102 INFO L495 AbstractCegarLoop]: Abstraction has 6760 states and 25219 transitions. [2022-11-20 20:41:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 25219 transitions. [2022-11-20 20:41:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:41:38,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:38,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:41:38,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:38,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:38,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:41:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash 50234, now seen corresponding path program 1 times [2022-11-20 20:41:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:41:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292544528] [2022-11-20 20:41:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:38,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:38,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:41:38,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:41:38,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 20:41:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:41:38,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:38,595 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:41:38,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:41:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:38,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:41:38,654 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:41:38,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292544528] [2022-11-20 20:41:38,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292544528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:41:38,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:41:38,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:41:38,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584231393] [2022-11-20 20:41:38,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:41:38,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:41:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:41:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:41:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:41:38,657 INFO L87 Difference]: Start difference. First operand 6760 states and 25219 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:39,883 INFO L93 Difference]: Finished difference Result 13516 states and 50434 transitions. [2022-11-20 20:41:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:41:39,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 20:41:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:40,065 INFO L225 Difference]: With dead ends: 13516 [2022-11-20 20:41:40,065 INFO L226 Difference]: Without dead ends: 13516 [2022-11-20 20:41:40,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:41:40,071 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:40,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:41:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13516 states. [2022-11-20 20:41:40,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13516 to 6763. [2022-11-20 20:41:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 5263 states have (on average 4.793273798213947) internal successors, (25227), 6762 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 25227 transitions. [2022-11-20 20:41:40,628 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 25227 transitions. Word has length 2 [2022-11-20 20:41:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:40,629 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 25227 transitions. [2022-11-20 20:41:40,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:40,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 25227 transitions. [2022-11-20 20:41:40,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:41:40,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:40,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:41:40,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:40,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:40,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:41:40,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:40,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1569017, now seen corresponding path program 1 times [2022-11-20 20:41:40,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:41:40,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996679150] [2022-11-20 20:41:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:40,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:40,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:41:40,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:41:40,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 20:41:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:41:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:41,228 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:41:41,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:41:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:41,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:41,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:41:41,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996679150] [2022-11-20 20:41:41,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996679150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:41,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [671020226] [2022-11-20 20:41:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:41:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:41:41,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:41:41,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-20 20:41:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:41,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:41:41,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:41,885 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:41:41,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:41:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:41,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:42,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [671020226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:42,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252871270] [2022-11-20 20:41:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:42,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:42,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:41:42,022 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:41:42,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:41:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:42,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:41:42,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:42,265 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:41:42,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:41:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:42,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:42,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252871270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:42,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:41:42,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-20 20:41:42,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924667084] [2022-11-20 20:41:42,488 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:41:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:41:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:41:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:41:42,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:41:42,489 INFO L87 Difference]: Start difference. First operand 6763 states and 25227 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) [2022-11-20 20:41:44,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:41:45,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:41:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:48,321 INFO L93 Difference]: Finished difference Result 27031 states and 100872 transitions. [2022-11-20 20:41:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:41:48,323 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 [2022-11-20 20:41:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:48,810 INFO L225 Difference]: With dead ends: 27031 [2022-11-20 20:41:48,811 INFO L226 Difference]: Without dead ends: 27031 [2022-11-20 20:41:48,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:41:48,817 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 431 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:48,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 0 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-20 20:41:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27031 states. [2022-11-20 20:41:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27031 to 6772. [2022-11-20 20:41:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 5272 states have (on average 4.789643399089529) internal successors, (25251), 6771 states have internal predecessors, (25251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 25251 transitions. [2022-11-20 20:41:49,464 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 25251 transitions. Word has length 3 [2022-11-20 20:41:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:49,464 INFO L495 AbstractCegarLoop]: Abstraction has 6772 states and 25251 transitions. [2022-11-20 20:41:49,465 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) [2022-11-20 20:41:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 25251 transitions. [2022-11-20 20:41:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:41:49,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:49,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:41:49,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:49,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-20 20:41:49,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:50,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:50,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:41:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash 48722073, now seen corresponding path program 1 times [2022-11-20 20:41:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:41:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048768757] [2022-11-20 20:41:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:50,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:50,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:41:50,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:41:50,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 20:41:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:50,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:41:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:50,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:50,314 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 20:41:50,315 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 [2022-11-20 20:41:50,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:50,676 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:41:50,677 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 [2022-11-20 20:41:51,037 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 20:41:51,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-20 20:41:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:53,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:41:53,531 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:41:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048768757] [2022-11-20 20:41:53,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048768757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:41:53,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:41:53,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:41:53,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22091797] [2022-11-20 20:41:53,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:41:53,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:41:53,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:41:53,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:41:53,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 20:41:53,533 INFO L87 Difference]: Start difference. First operand 6772 states and 25251 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-20 20:41:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:54,054 INFO L93 Difference]: Finished difference Result 6774 states and 25256 transitions. [2022-11-20 20:41:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:41:54,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 [2022-11-20 20:41:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:54,087 INFO L225 Difference]: With dead ends: 6774 [2022-11-20 20:41:54,087 INFO L226 Difference]: Without dead ends: 6774 [2022-11-20 20:41:54,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 20:41:54,089 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:54,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-11-20 20:41:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6774 states. [2022-11-20 20:41:54,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6774 to 6774. [2022-11-20 20:41:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6774 states, 5274 states have (on average 4.788775123246113) internal successors, (25256), 6773 states have internal predecessors, (25256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6774 states to 6774 states and 25256 transitions. [2022-11-20 20:41:54,300 INFO L78 Accepts]: Start accepts. Automaton has 6774 states and 25256 transitions. Word has length 4 [2022-11-20 20:41:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:54,301 INFO L495 AbstractCegarLoop]: Abstraction has 6774 states and 25256 transitions. [2022-11-20 20:41:54,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-20 20:41:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6774 states and 25256 transitions. [2022-11-20 20:41:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:41:54,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:54,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:41:54,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:54,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:54,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:41:54,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:54,515 INFO L85 PathProgramCache]: Analyzing trace with hash 48722074, now seen corresponding path program 1 times [2022-11-20 20:41:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:41:54,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334314099] [2022-11-20 20:41:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:54,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:54,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:41:54,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:41:54,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 20:41:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:54,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:41:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:54,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:54,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:54,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:54,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:54,846 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 20:41:54,846 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 [2022-11-20 20:41:54,874 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 20:41:54,874 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 [2022-11-20 20:41:54,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:54,929 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 [2022-11-20 20:41:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:54,959 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 [2022-11-20 20:41:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:54,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:41:54,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:41:54,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334314099] [2022-11-20 20:41:54,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334314099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:41:54,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:41:54,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:41:54,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162708885] [2022-11-20 20:41:54,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:41:54,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:41:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:41:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:41:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:41:54,992 INFO L87 Difference]: Start difference. First operand 6774 states and 25256 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) [2022-11-20 20:41:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:55,463 INFO L93 Difference]: Finished difference Result 5401 states and 19566 transitions. [2022-11-20 20:41:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:41:55,464 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 [2022-11-20 20:41:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:55,491 INFO L225 Difference]: With dead ends: 5401 [2022-11-20 20:41:55,491 INFO L226 Difference]: Without dead ends: 5401 [2022-11-20 20:41:55,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:41:55,492 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:55,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-20 20:41:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2022-11-20 20:41:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 5401. [2022-11-20 20:41:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 4307 states have (on average 4.542837241699559) internal successors, (19566), 5400 states have internal predecessors, (19566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 19566 transitions. [2022-11-20 20:41:55,638 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 19566 transitions. Word has length 4 [2022-11-20 20:41:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:55,639 INFO L495 AbstractCegarLoop]: Abstraction has 5401 states and 19566 transitions. [2022-11-20 20:41:55,639 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) [2022-11-20 20:41:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 19566 transitions. [2022-11-20 20:41:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:41:55,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:55,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:41:55,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:55,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:55,851 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:41:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1508272536, now seen corresponding path program 1 times [2022-11-20 20:41:55,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:41:55,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076520649] [2022-11-20 20:41:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:55,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:55,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:41:55,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:41:55,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 20:41:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:41:55,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:56,102 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 20:41:56,102 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 [2022-11-20 20:41:56,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:56,511 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:41:56,512 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 [2022-11-20 20:41:56,849 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 20:41:56,849 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 76 [2022-11-20 20:41:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:41:57,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:41:57,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:41:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076520649] [2022-11-20 20:41:57,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076520649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:41:57,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:41:57,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:41:57,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830322566] [2022-11-20 20:41:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:41:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:41:57,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:41:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:41:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:41:57,315 INFO L87 Difference]: Start difference. First operand 5401 states and 19566 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:57,696 INFO L93 Difference]: Finished difference Result 5402 states and 19568 transitions. [2022-11-20 20:41:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:41:57,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 20:41:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:57,721 INFO L225 Difference]: With dead ends: 5402 [2022-11-20 20:41:57,721 INFO L226 Difference]: Without dead ends: 5402 [2022-11-20 20:41:57,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:41:57,722 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:57,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-11-20 20:41:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2022-11-20 20:41:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 5400. [2022-11-20 20:41:57,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 4306 states have (on average 4.543427775197399) internal successors, (19564), 5399 states have internal predecessors, (19564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 19564 transitions. [2022-11-20 20:41:57,869 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 19564 transitions. Word has length 5 [2022-11-20 20:41:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:57,870 INFO L495 AbstractCegarLoop]: Abstraction has 5400 states and 19564 transitions. [2022-11-20 20:41:57,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 19564 transitions. [2022-11-20 20:41:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:41:57,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:57,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:41:57,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:58,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:58,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:41:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:58,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1510277182, now seen corresponding path program 1 times [2022-11-20 20:41:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:41:58,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859315124] [2022-11-20 20:41:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:58,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:58,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:41:58,085 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:41:58,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 20:41:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:41:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:58,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:58,355 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 20:41:58,356 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 [2022-11-20 20:41:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:41:58,447 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 14 treesize of output 20 [2022-11-20 20:41:58,509 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:41:58,510 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 [2022-11-20 20:41:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:41:58,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:41:58,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:41:58,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859315124] [2022-11-20 20:41:58,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859315124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:41:58,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:41:58,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:41:58,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874839253] [2022-11-20 20:41:58,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:41:58,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:41:58,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:41:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:41:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:41:58,528 INFO L87 Difference]: Start difference. First operand 5400 states and 19564 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:58,996 INFO L93 Difference]: Finished difference Result 4027 states and 13875 transitions. [2022-11-20 20:41:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:41:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 20:41:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:59,010 INFO L225 Difference]: With dead ends: 4027 [2022-11-20 20:41:59,011 INFO L226 Difference]: Without dead ends: 4027 [2022-11-20 20:41:59,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:41:59,011 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:59,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-20 20:41:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4027 states. [2022-11-20 20:41:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4027 to 4026. [2022-11-20 20:41:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3338 states have (on average 4.156081485919713) internal successors, (13873), 4025 states have internal predecessors, (13873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13873 transitions. [2022-11-20 20:41:59,147 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13873 transitions. Word has length 5 [2022-11-20 20:41:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:59,147 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 13873 transitions. [2022-11-20 20:41:59,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13873 transitions. [2022-11-20 20:41:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:41:59,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:59,148 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 20:41:59,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-20 20:41:59,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:59,360 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:41:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:59,360 INFO L85 PathProgramCache]: Analyzing trace with hash -490374150, now seen corresponding path program 2 times [2022-11-20 20:41:59,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:41:59,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072020702] [2022-11-20 20:41:59,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:41:59,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:41:59,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:41:59,362 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:41:59,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 20:41:59,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:41:59,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:41:59,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:41:59,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:59,631 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:41:59,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:41:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:59,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:00,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:42:00,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072020702] [2022-11-20 20:42:00,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072020702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:00,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007319538] [2022-11-20 20:42:00,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:42:00,485 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:42:00,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:42:00,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:42:00,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-20 20:42:00,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:42:00,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:42:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:42:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:00,874 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:42:00,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:42:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:00,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:01,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007319538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:01,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851312300] [2022-11-20 20:42:01,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:42:01,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:42:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:42:01,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:42:01,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:42:01,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:42:01,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:42:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:42:02,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:02,133 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:42:02,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:42:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:02,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:02,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851312300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:02,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:42:02,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-20 20:42:02,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542033466] [2022-11-20 20:42:02,419 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:42:02,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 20:42:02,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:42:02,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 20:42:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:42:02,421 INFO L87 Difference]: Start difference. First operand 4026 states and 13873 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) [2022-11-20 20:42:06,343 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 [] [2022-11-20 20:42:08,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:09,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:11,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:13,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:15,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:17,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:19,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:21,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:23,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:25,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:26,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:27,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:29,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:31,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:33,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:35,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:37,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:39,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:42,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:50,437 INFO L93 Difference]: Finished difference Result 36101 states and 124620 transitions. [2022-11-20 20:42:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:42:50,439 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 [2022-11-20 20:42:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:50,629 INFO L225 Difference]: With dead ends: 36101 [2022-11-20 20:42:50,629 INFO L226 Difference]: Without dead ends: 36101 [2022-11-20 20:42:50,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:42:50,630 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2439 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 254 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2439 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:50,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2439 Valid, 0 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2478 Invalid, 11 Unknown, 0 Unchecked, 45.8s Time] [2022-11-20 20:42:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36101 states. [2022-11-20 20:42:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36101 to 4042. [2022-11-20 20:42:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 3354 states have (on average 4.146690518783542) internal successors, (13908), 4041 states have internal predecessors, (13908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 13908 transitions. [2022-11-20 20:42:51,163 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 13908 transitions. Word has length 6 [2022-11-20 20:42:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:51,163 INFO L495 AbstractCegarLoop]: Abstraction has 4042 states and 13908 transitions. [2022-11-20 20:42:51,163 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) [2022-11-20 20:42:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 13908 transitions. [2022-11-20 20:42:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:42:51,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:51,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:42:51,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:51,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 20:42:51,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:51,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:42:51,776 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:42:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash -422691128, now seen corresponding path program 1 times [2022-11-20 20:42:51,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:42:51,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479355620] [2022-11-20 20:42:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:51,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:42:51,778 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:42:51,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 20:42:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:42:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:51,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:51,996 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 20:42:51,996 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 [2022-11-20 20:42:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:52,243 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 20:42:52,244 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 [2022-11-20 20:42:52,433 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 20:42:52,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 20:42:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:52,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:42:52,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:42:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479355620] [2022-11-20 20:42:52,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479355620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:42:52,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:42:52,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:42:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306652566] [2022-11-20 20:42:52,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:42:52,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:42:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:42:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:42:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:42:52,579 INFO L87 Difference]: Start difference. First operand 4042 states and 13908 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:52,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:52,902 INFO L93 Difference]: Finished difference Result 4046 states and 13916 transitions. [2022-11-20 20:42:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:42:52,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:42:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:52,919 INFO L225 Difference]: With dead ends: 4046 [2022-11-20 20:42:52,919 INFO L226 Difference]: Without dead ends: 4046 [2022-11-20 20:42:52,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:42:52,920 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:52,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-11-20 20:42:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2022-11-20 20:42:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 4046. [2022-11-20 20:42:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 3358 states have (on average 4.144133412745682) internal successors, (13916), 4045 states have internal predecessors, (13916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 13916 transitions. [2022-11-20 20:42:53,022 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 13916 transitions. Word has length 6 [2022-11-20 20:42:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:53,023 INFO L495 AbstractCegarLoop]: Abstraction has 4046 states and 13916 transitions. [2022-11-20 20:42:53,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 13916 transitions. [2022-11-20 20:42:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:42:53,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:53,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:42:53,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:53,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:53,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:42:53,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:53,237 INFO L85 PathProgramCache]: Analyzing trace with hash -422691127, now seen corresponding path program 1 times [2022-11-20 20:42:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:42:53,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715641646] [2022-11-20 20:42:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:53,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:42:53,239 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:42:53,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 20:42:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:42:53,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:53,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:53,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:53,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:53,478 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 20:42:53,479 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 [2022-11-20 20:42:53,495 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 [2022-11-20 20:42:53,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:53,551 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 [2022-11-20 20:42:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:53,587 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 [2022-11-20 20:42:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:53,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:42:53,646 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:42:53,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715641646] [2022-11-20 20:42:53,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715641646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:42:53,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:42:53,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:42:53,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848236845] [2022-11-20 20:42:53,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:42:53,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:42:53,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:42:53,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:42:53,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:42:53,647 INFO L87 Difference]: Start difference. First operand 4046 states and 13916 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:54,088 INFO L93 Difference]: Finished difference Result 3934 states and 13585 transitions. [2022-11-20 20:42:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:42:54,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:42:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:54,099 INFO L225 Difference]: With dead ends: 3934 [2022-11-20 20:42:54,099 INFO L226 Difference]: Without dead ends: 3934 [2022-11-20 20:42:54,100 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 [2022-11-20 20:42:54,100 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:54,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-20 20:42:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2022-11-20 20:42:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3934. [2022-11-20 20:42:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 3300 states have (on average 4.116666666666666) internal successors, (13585), 3933 states have internal predecessors, (13585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 13585 transitions. [2022-11-20 20:42:54,204 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 13585 transitions. Word has length 6 [2022-11-20 20:42:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:54,204 INFO L495 AbstractCegarLoop]: Abstraction has 3934 states and 13585 transitions. [2022-11-20 20:42:54,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 13585 transitions. [2022-11-20 20:42:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:42:54,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:54,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:42:54,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:54,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:54,414 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:42:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2045965319, now seen corresponding path program 1 times [2022-11-20 20:42:54,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:42:54,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291446618] [2022-11-20 20:42:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:54,416 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 [2022-11-20 20:42:54,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:42:54,417 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:42:54,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 20:42:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:54,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:42:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:54,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:54,671 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 20:42:54,672 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 [2022-11-20 20:42:54,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:54,962 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 20:42:54,962 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 [2022-11-20 20:42:55,175 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 20:42:55,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 20:42:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:42:55,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:42:55,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:42:55,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291446618] [2022-11-20 20:42:55,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291446618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:42:55,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:42:55,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:42:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151567025] [2022-11-20 20:42:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:42:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:42:55,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:42:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:42:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:42:55,317 INFO L87 Difference]: Start difference. First operand 3934 states and 13585 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:55,707 INFO L93 Difference]: Finished difference Result 3937 states and 13590 transitions. [2022-11-20 20:42:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:42:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:42:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:55,717 INFO L225 Difference]: With dead ends: 3937 [2022-11-20 20:42:55,717 INFO L226 Difference]: Without dead ends: 3937 [2022-11-20 20:42:55,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:42:55,718 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:55,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-20 20:42:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2022-11-20 20:42:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3933. [2022-11-20 20:42:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3933 states, 3299 states have (on average 4.11730827523492) internal successors, (13583), 3932 states have internal predecessors, (13583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3933 states to 3933 states and 13583 transitions. [2022-11-20 20:42:55,808 INFO L78 Accepts]: Start accepts. Automaton has 3933 states and 13583 transitions. Word has length 7 [2022-11-20 20:42:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:55,809 INFO L495 AbstractCegarLoop]: Abstraction has 3933 states and 13583 transitions. [2022-11-20 20:42:55,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3933 states and 13583 transitions. [2022-11-20 20:42:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:42:55,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:55,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:42:55,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:56,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:56,022 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:42:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash -322537171, now seen corresponding path program 1 times [2022-11-20 20:42:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:42:56,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506855173] [2022-11-20 20:42:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:56,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:56,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:42:56,025 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:42:56,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 20:42:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:42:56,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,278 INFO L321 Elim1Store]: treesize reduction 66, result has 25.0 percent of original size [2022-11-20 20:42:56,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 52 [2022-11-20 20:42:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,516 INFO L321 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2022-11-20 20:42:56,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 67 [2022-11-20 20:42:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:56,898 INFO L321 Elim1Store]: treesize reduction 84, result has 25.7 percent of original size [2022-11-20 20:42:56,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 56 [2022-11-20 20:42:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:42:57,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:42:57,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:42:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506855173] [2022-11-20 20:42:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506855173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:42:57,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:42:57,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:42:57,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034292261] [2022-11-20 20:42:57,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:42:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:42:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:42:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:42:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:42:57,496 INFO L87 Difference]: Start difference. First operand 3933 states and 13583 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:57,830 INFO L93 Difference]: Finished difference Result 3949 states and 13616 transitions. [2022-11-20 20:42:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:42:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:42:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:57,845 INFO L225 Difference]: With dead ends: 3949 [2022-11-20 20:42:57,846 INFO L226 Difference]: Without dead ends: 3949 [2022-11-20 20:42:57,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:42:57,847 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:57,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-11-20 20:42:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2022-11-20 20:42:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3943. [2022-11-20 20:42:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3309 states have (on average 4.1118162586884255) internal successors, (13606), 3942 states have internal predecessors, (13606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 13606 transitions. [2022-11-20 20:42:57,929 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 13606 transitions. Word has length 7 [2022-11-20 20:42:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:57,930 INFO L495 AbstractCegarLoop]: Abstraction has 3943 states and 13606 transitions. [2022-11-20 20:42:57,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 13606 transitions. [2022-11-20 20:42:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:42:57,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:57,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:42:57,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:58,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:58,143 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:42:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash -219728430, now seen corresponding path program 1 times [2022-11-20 20:42:58,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:42:58,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352554988] [2022-11-20 20:42:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:58,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:58,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:42:58,145 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:42:58,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 20:42:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:42:58,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,427 INFO L321 Elim1Store]: treesize reduction 66, result has 25.0 percent of original size [2022-11-20 20:42:58,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 52 [2022-11-20 20:42:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,707 INFO L321 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2022-11-20 20:42:58,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 79 [2022-11-20 20:42:58,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:42:59,044 INFO L321 Elim1Store]: treesize reduction 100, result has 26.5 percent of original size [2022-11-20 20:42:59,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 68 [2022-11-20 20:43:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:02,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:02,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:02,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352554988] [2022-11-20 20:43:02,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352554988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:02,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:02,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:43:02,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344072584] [2022-11-20 20:43:02,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:02,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:43:02,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:43:02,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-11-20 20:43:02,136 INFO L87 Difference]: Start difference. First operand 3943 states and 13606 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:02,466 INFO L93 Difference]: Finished difference Result 3957 states and 13634 transitions. [2022-11-20 20:43:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:43:02,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:43:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:02,477 INFO L225 Difference]: With dead ends: 3957 [2022-11-20 20:43:02,477 INFO L226 Difference]: Without dead ends: 3957 [2022-11-20 20:43:02,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-11-20 20:43:02,478 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:02,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-11-20 20:43:02,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2022-11-20 20:43:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3953. [2022-11-20 20:43:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3319 states have (on average 4.106056040976197) internal successors, (13628), 3952 states have internal predecessors, (13628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 13628 transitions. [2022-11-20 20:43:02,547 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 13628 transitions. Word has length 7 [2022-11-20 20:43:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:02,547 INFO L495 AbstractCegarLoop]: Abstraction has 3953 states and 13628 transitions. [2022-11-20 20:43:02,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 13628 transitions. [2022-11-20 20:43:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:43:02,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:02,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:02,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:02,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:02,749 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:02,749 INFO L85 PathProgramCache]: Analyzing trace with hash -218528601, now seen corresponding path program 1 times [2022-11-20 20:43:02,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889836415] [2022-11-20 20:43:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:02,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:02,751 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:02,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-20 20:43:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:43:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:02,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:02,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889836415] [2022-11-20 20:43:02,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889836415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:02,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:02,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:43:02,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928667443] [2022-11-20 20:43:02,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:02,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:43:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:43:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:02,921 INFO L87 Difference]: Start difference. First operand 3953 states and 13628 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:04,070 INFO L93 Difference]: Finished difference Result 5057 states and 16994 transitions. [2022-11-20 20:43:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:43:04,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:43:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:04,083 INFO L225 Difference]: With dead ends: 5057 [2022-11-20 20:43:04,083 INFO L226 Difference]: Without dead ends: 5057 [2022-11-20 20:43:04,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:04,083 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:04,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 20:43:04,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5057 states. [2022-11-20 20:43:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5057 to 4476. [2022-11-20 20:43:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 3842 states have (on average 4.010931806350859) internal successors, (15410), 4475 states have internal predecessors, (15410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 15410 transitions. [2022-11-20 20:43:04,162 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 15410 transitions. Word has length 7 [2022-11-20 20:43:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:04,162 INFO L495 AbstractCegarLoop]: Abstraction has 4476 states and 15410 transitions. [2022-11-20 20:43:04,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 15410 transitions. [2022-11-20 20:43:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:43:04,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:04,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:04,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:04,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:04,367 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash -218528420, now seen corresponding path program 1 times [2022-11-20 20:43:04,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:04,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309026537] [2022-11-20 20:43:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:04,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:04,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:04,369 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:04,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 20:43:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:43:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:04,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:04,597 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 20:43:04,597 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 [2022-11-20 20:43:04,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:04,841 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 20:43:04,841 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 [2022-11-20 20:43:05,042 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 20:43:05,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 20:43:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:05,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:05,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309026537] [2022-11-20 20:43:05,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309026537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:05,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:05,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:43:05,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515559951] [2022-11-20 20:43:05,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:05,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:05,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:05,224 INFO L87 Difference]: Start difference. First operand 4476 states and 15410 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:05,581 INFO L93 Difference]: Finished difference Result 4479 states and 15415 transitions. [2022-11-20 20:43:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:43:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:43:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:05,596 INFO L225 Difference]: With dead ends: 4479 [2022-11-20 20:43:05,596 INFO L226 Difference]: Without dead ends: 4479 [2022-11-20 20:43:05,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:05,597 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:05,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-20 20:43:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4479 states. [2022-11-20 20:43:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4479 to 4479. [2022-11-20 20:43:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4479 states, 3845 states have (on average 4.0091027308192455) internal successors, (15415), 4478 states have internal predecessors, (15415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4479 states to 4479 states and 15415 transitions. [2022-11-20 20:43:05,698 INFO L78 Accepts]: Start accepts. Automaton has 4479 states and 15415 transitions. Word has length 7 [2022-11-20 20:43:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:05,699 INFO L495 AbstractCegarLoop]: Abstraction has 4479 states and 15415 transitions. [2022-11-20 20:43:05,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4479 states and 15415 transitions. [2022-11-20 20:43:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:43:05,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:05,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:05,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:05,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:05,924 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:05,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1103598642, now seen corresponding path program 1 times [2022-11-20 20:43:05,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:05,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596504264] [2022-11-20 20:43:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:05,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:05,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:05,926 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:05,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 20:43:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:43:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:06,193 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 20:43:06,193 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 [2022-11-20 20:43:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:06,435 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 20:43:06,435 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 [2022-11-20 20:43:06,629 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 20:43:06,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 20:43:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:43:06,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:06,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:06,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596504264] [2022-11-20 20:43:06,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596504264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:06,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:06,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:43:06,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719472983] [2022-11-20 20:43:06,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:06,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:06,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:06,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:06,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:06,797 INFO L87 Difference]: Start difference. First operand 4479 states and 15415 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) [2022-11-20 20:43:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:07,174 INFO L93 Difference]: Finished difference Result 4483 states and 15421 transitions. [2022-11-20 20:43:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:43:07,175 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 [2022-11-20 20:43:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:07,188 INFO L225 Difference]: With dead ends: 4483 [2022-11-20 20:43:07,188 INFO L226 Difference]: Without dead ends: 4483 [2022-11-20 20:43:07,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:07,189 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:07,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-20 20:43:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2022-11-20 20:43:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 4478. [2022-11-20 20:43:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 3844 states have (on average 4.009625390218522) internal successors, (15413), 4477 states have internal predecessors, (15413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 15413 transitions. [2022-11-20 20:43:07,277 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 15413 transitions. Word has length 8 [2022-11-20 20:43:07,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:07,278 INFO L495 AbstractCegarLoop]: Abstraction has 4478 states and 15413 transitions. [2022-11-20 20:43:07,278 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) [2022-11-20 20:43:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 15413 transitions. [2022-11-20 20:43:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:43:07,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:07,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:07,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:07,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:07,491 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:07,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1000789901, now seen corresponding path program 1 times [2022-11-20 20:43:07,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:07,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878481876] [2022-11-20 20:43:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:07,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:07,493 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:07,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 20:43:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:07,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:43:07,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:07,873 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 20:43:07,873 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 [2022-11-20 20:43:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:07,996 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 [2022-11-20 20:43:08,046 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:43:08,046 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 [2022-11-20 20:43:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:43:08,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:08,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:08,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878481876] [2022-11-20 20:43:08,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878481876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:08,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:08,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:43:08,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052615313] [2022-11-20 20:43:08,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:08,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:08,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:08,101 INFO L87 Difference]: Start difference. First operand 4478 states and 15413 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) [2022-11-20 20:43:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:08,539 INFO L93 Difference]: Finished difference Result 4364 states and 15079 transitions. [2022-11-20 20:43:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:43:08,539 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 [2022-11-20 20:43:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:08,550 INFO L225 Difference]: With dead ends: 4364 [2022-11-20 20:43:08,550 INFO L226 Difference]: Without dead ends: 4364 [2022-11-20 20:43:08,551 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 [2022-11-20 20:43:08,551 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:08,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-20 20:43:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2022-11-20 20:43:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 4347. [2022-11-20 20:43:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 3767 states have (on average 3.994159808866472) internal successors, (15046), 4346 states have internal predecessors, (15046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 15046 transitions. [2022-11-20 20:43:08,624 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 15046 transitions. Word has length 8 [2022-11-20 20:43:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:08,624 INFO L495 AbstractCegarLoop]: Abstraction has 4347 states and 15046 transitions. [2022-11-20 20:43:08,624 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) [2022-11-20 20:43:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 15046 transitions. [2022-11-20 20:43:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:43:08,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:08,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:08,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:08,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:08,826 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:08,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash -999590072, now seen corresponding path program 1 times [2022-11-20 20:43:08,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:08,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282916863] [2022-11-20 20:43:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:08,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:08,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:08,828 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:08,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 20:43:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:43:08,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:09,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:09,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:09,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282916863] [2022-11-20 20:43:09,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282916863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:09,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:09,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:43:09,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870084432] [2022-11-20 20:43:09,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:09,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:43:09,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:09,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:43:09,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:09,039 INFO L87 Difference]: Start difference. First operand 4347 states and 15046 transitions. Second operand has 5 states, 4 states have (on average 2.0) 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) [2022-11-20 20:43:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:10,245 INFO L93 Difference]: Finished difference Result 5866 states and 19878 transitions. [2022-11-20 20:43:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:43:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) 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 [2022-11-20 20:43:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:10,312 INFO L225 Difference]: With dead ends: 5866 [2022-11-20 20:43:10,312 INFO L226 Difference]: Without dead ends: 5866 [2022-11-20 20:43:10,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:10,313 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:10,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 20:43:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2022-11-20 20:43:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 4347. [2022-11-20 20:43:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 3767 states have (on average 3.994159808866472) internal successors, (15046), 4346 states have internal predecessors, (15046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 15046 transitions. [2022-11-20 20:43:10,406 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 15046 transitions. Word has length 8 [2022-11-20 20:43:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:10,406 INFO L495 AbstractCegarLoop]: Abstraction has 4347 states and 15046 transitions. [2022-11-20 20:43:10,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) 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) [2022-11-20 20:43:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 15046 transitions. [2022-11-20 20:43:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:43:10,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:10,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:10,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:10,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:10,608 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1815753138, now seen corresponding path program 1 times [2022-11-20 20:43:10,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:10,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703843147] [2022-11-20 20:43:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:10,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:10,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:10,610 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:10,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 20:43:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:10,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:43:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:10,844 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:43:10,844 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 [2022-11-20 20:43:10,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:10,885 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 [2022-11-20 20:43:10,919 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:43:10,920 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 [2022-11-20 20:43:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:10,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:10,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:10,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703843147] [2022-11-20 20:43:10,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703843147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:10,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:10,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:43:10,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636337638] [2022-11-20 20:43:10,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:10,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:10,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:10,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:10,977 INFO L87 Difference]: Start difference. First operand 4347 states and 15046 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) [2022-11-20 20:43:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:11,454 INFO L93 Difference]: Finished difference Result 4352 states and 15057 transitions. [2022-11-20 20:43:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:43:11,455 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 [2022-11-20 20:43:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:11,469 INFO L225 Difference]: With dead ends: 4352 [2022-11-20 20:43:11,469 INFO L226 Difference]: Without dead ends: 4352 [2022-11-20 20:43:11,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:11,470 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:11,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-11-20 20:43:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2022-11-20 20:43:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 4352. [2022-11-20 20:43:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 3772 states have (on average 3.991781548250265) internal successors, (15057), 4351 states have internal predecessors, (15057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 15057 transitions. [2022-11-20 20:43:11,553 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 15057 transitions. Word has length 8 [2022-11-20 20:43:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:11,554 INFO L495 AbstractCegarLoop]: Abstraction has 4352 states and 15057 transitions. [2022-11-20 20:43:11,554 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) [2022-11-20 20:43:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 15057 transitions. [2022-11-20 20:43:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:43:11,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:11,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:11,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:11,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:11,769 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:11,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1815753139, now seen corresponding path program 1 times [2022-11-20 20:43:11,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:11,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683003722] [2022-11-20 20:43:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:11,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:11,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:11,771 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:11,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 20:43:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:43:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:11,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:11,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:12,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:12,081 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 20:43:12,082 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 [2022-11-20 20:43:12,092 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 [2022-11-20 20:43:12,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:12,133 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 [2022-11-20 20:43:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:12,185 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 [2022-11-20 20:43:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:12,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:12,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683003722] [2022-11-20 20:43:12,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683003722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:12,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:12,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:43:12,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231041018] [2022-11-20 20:43:12,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:43:12,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:43:12,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:12,282 INFO L87 Difference]: Start difference. First operand 4352 states and 15057 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:12,809 INFO L93 Difference]: Finished difference Result 4121 states and 14340 transitions. [2022-11-20 20:43:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:43:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:43:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:12,820 INFO L225 Difference]: With dead ends: 4121 [2022-11-20 20:43:12,820 INFO L226 Difference]: Without dead ends: 4121 [2022-11-20 20:43:12,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:12,821 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 166 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:12,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 4 Unchecked, 0.5s Time] [2022-11-20 20:43:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2022-11-20 20:43:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 4121. [2022-11-20 20:43:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4121 states, 3627 states have (on average 3.9536807278742763) internal successors, (14340), 4120 states have internal predecessors, (14340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 14340 transitions. [2022-11-20 20:43:12,906 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 14340 transitions. Word has length 8 [2022-11-20 20:43:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:12,907 INFO L495 AbstractCegarLoop]: Abstraction has 4121 states and 14340 transitions. [2022-11-20 20:43:12,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 14340 transitions. [2022-11-20 20:43:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:43:12,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:12,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:12,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:13,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:13,108 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash 148174945, now seen corresponding path program 1 times [2022-11-20 20:43:13,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:13,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150402684] [2022-11-20 20:43:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:13,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:13,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:13,110 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:13,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 20:43:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:43:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:13,411 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:43:13,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:13,445 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:43:13,446 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 [2022-11-20 20:43:13,472 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:43:13,472 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 [2022-11-20 20:43:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:43:13,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:13,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:13,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150402684] [2022-11-20 20:43:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150402684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:13,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:13,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:43:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672232248] [2022-11-20 20:43:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:13,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:13,489 INFO L87 Difference]: Start difference. First operand 4121 states and 14340 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) [2022-11-20 20:43:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:13,871 INFO L93 Difference]: Finished difference Result 3137 states and 10932 transitions. [2022-11-20 20:43:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:43:13,871 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 [2022-11-20 20:43:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:13,879 INFO L225 Difference]: With dead ends: 3137 [2022-11-20 20:43:13,879 INFO L226 Difference]: Without dead ends: 3137 [2022-11-20 20:43:13,879 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 [2022-11-20 20:43:13,880 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:13,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:43:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2022-11-20 20:43:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 3137. [2022-11-20 20:43:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 2835 states have (on average 3.856084656084656) internal successors, (10932), 3136 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 10932 transitions. [2022-11-20 20:43:13,929 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 10932 transitions. Word has length 9 [2022-11-20 20:43:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:13,929 INFO L495 AbstractCegarLoop]: Abstraction has 3137 states and 10932 transitions. [2022-11-20 20:43:13,929 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) [2022-11-20 20:43:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 10932 transitions. [2022-11-20 20:43:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:43:13,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:13,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:13,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:14,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:14,132 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash 148175026, now seen corresponding path program 1 times [2022-11-20 20:43:14,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:14,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562019645] [2022-11-20 20:43:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:14,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:14,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:14,134 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:14,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 20:43:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:43:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:14,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:14,361 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:43:14,362 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 [2022-11-20 20:43:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:43:14,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:43:14,392 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:14,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562019645] [2022-11-20 20:43:14,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562019645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:43:14,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:43:14,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:43:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574030318] [2022-11-20 20:43:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:43:14,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:43:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:43:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:43:14,394 INFO L87 Difference]: Start difference. First operand 3137 states and 10932 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:14,775 INFO L93 Difference]: Finished difference Result 2410 states and 8362 transitions. [2022-11-20 20:43:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:43:14,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:43:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:14,783 INFO L225 Difference]: With dead ends: 2410 [2022-11-20 20:43:14,783 INFO L226 Difference]: Without dead ends: 2410 [2022-11-20 20:43:14,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:43:14,783 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:14,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:43:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2022-11-20 20:43:14,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2410. [2022-11-20 20:43:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2228 states have (on average 3.753141831238779) internal successors, (8362), 2409 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 8362 transitions. [2022-11-20 20:43:14,834 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 8362 transitions. Word has length 9 [2022-11-20 20:43:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:14,835 INFO L495 AbstractCegarLoop]: Abstraction has 2410 states and 8362 transitions. [2022-11-20 20:43:14,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 8362 transitions. [2022-11-20 20:43:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:43:14,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:14,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:14,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:15,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:15,048 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:15,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:15,049 INFO L85 PathProgramCache]: Analyzing trace with hash 148174946, now seen corresponding path program 1 times [2022-11-20 20:43:15,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:15,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255609186] [2022-11-20 20:43:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:15,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:15,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:15,050 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:15,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 20:43:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:15,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:43:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:15,432 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:43:15,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:15,593 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:43:15,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 20:43:15,741 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:43:15,742 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 [2022-11-20 20:43:15,751 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 [2022-11-20 20:43:15,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:15,813 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 [2022-11-20 20:43:15,830 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:43:15,831 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 [2022-11-20 20:43:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:15,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:17,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255609186] [2022-11-20 20:43:17,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255609186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [608498589] [2022-11-20 20:43:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:43:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:43:17,088 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:43:17,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-20 20:43:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:43:17,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:17,617 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:43:17,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:17,773 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:43:17,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:17,986 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:43:17,987 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 [2022-11-20 20:43:17,994 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 [2022-11-20 20:43:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:18,062 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 [2022-11-20 20:43:18,083 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:43:18,083 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 [2022-11-20 20:43:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:18,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:21,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [608498589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:21,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613606489] [2022-11-20 20:43:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:21,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:21,435 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:21,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 20:43:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:21,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:43:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:21,808 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:43:21,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:21,982 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:43:21,983 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 [2022-11-20 20:43:21,995 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 [2022-11-20 20:43:22,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:22,079 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 [2022-11-20 20:43:22,092 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:43:22,093 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 [2022-11-20 20:43:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:22,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:23,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:43:23,112 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 [2022-11-20 20:43:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:31,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613606489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:31,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:43:31,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-20 20:43:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268626283] [2022-11-20 20:43:31,276 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:31,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 20:43:31,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 20:43:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=189, Unknown=1, NotChecked=0, Total=240 [2022-11-20 20:43:31,278 INFO L87 Difference]: Start difference. First operand 2410 states and 8362 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2022-11-20 20:43:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:33,451 INFO L93 Difference]: Finished difference Result 4980 states and 17085 transitions. [2022-11-20 20:43:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:43:33,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 9 [2022-11-20 20:43:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:33,468 INFO L225 Difference]: With dead ends: 4980 [2022-11-20 20:43:33,468 INFO L226 Difference]: Without dead ends: 4980 [2022-11-20 20:43:33,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=55, Invalid=216, Unknown=1, NotChecked=0, Total=272 [2022-11-20 20:43:33,469 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 211 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1086 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:33,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 0 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 0 Unknown, 1086 Unchecked, 2.0s Time] [2022-11-20 20:43:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2022-11-20 20:43:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 2795. [2022-11-20 20:43:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2613 states have (on average 3.840030616150019) internal successors, (10034), 2794 states have internal predecessors, (10034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 10034 transitions. [2022-11-20 20:43:33,555 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 10034 transitions. Word has length 9 [2022-11-20 20:43:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:33,555 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 10034 transitions. [2022-11-20 20:43:33,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2022-11-20 20:43:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 10034 transitions. [2022-11-20 20:43:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:43:33,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:33,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:33,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:33,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:33,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:34,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:34,157 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash 148175027, now seen corresponding path program 1 times [2022-11-20 20:43:34,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:34,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324843823] [2022-11-20 20:43:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:34,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:34,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:34,159 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:34,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 20:43:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:34,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:43:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:34,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:34,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 20:43:34,669 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:43:34,670 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 [2022-11-20 20:43:34,699 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:43:34,700 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 [2022-11-20 20:43:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:34,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:37,475 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:37,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324843823] [2022-11-20 20:43:37,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324843823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:37,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1818050743] [2022-11-20 20:43:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:37,476 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:43:37,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:43:37,477 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:43:37,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-20 20:43:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:43:37,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:37,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 20:43:37,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:37,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:37,970 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 [2022-11-20 20:43:37,982 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:43:37,983 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 [2022-11-20 20:43:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:38,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:38,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1818050743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:38,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105444537] [2022-11-20 20:43:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:38,322 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:38,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 20:43:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:43:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:38,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:38,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:43:38,646 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 [2022-11-20 20:43:38,658 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:43:38,658 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 [2022-11-20 20:43:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:38,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:43:38,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105444537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:38,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:43:38,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5, 5] total 12 [2022-11-20 20:43:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136934173] [2022-11-20 20:43:38,983 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:38,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:43:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:43:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:43:38,985 INFO L87 Difference]: Start difference. First operand 2795 states and 10034 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:41,796 INFO L93 Difference]: Finished difference Result 9123 states and 32609 transitions. [2022-11-20 20:43:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:43:41,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:43:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:41,830 INFO L225 Difference]: With dead ends: 9123 [2022-11-20 20:43:41,830 INFO L226 Difference]: Without dead ends: 9123 [2022-11-20 20:43:41,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:43:41,831 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 433 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1020 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:41,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 0 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 445 Invalid, 0 Unknown, 1020 Unchecked, 2.5s Time] [2022-11-20 20:43:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9123 states. [2022-11-20 20:43:41,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9123 to 3469. [2022-11-20 20:43:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3315 states have (on average 3.8838612368024132) internal successors, (12875), 3468 states have internal predecessors, (12875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 12875 transitions. [2022-11-20 20:43:41,978 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 12875 transitions. Word has length 9 [2022-11-20 20:43:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:41,978 INFO L495 AbstractCegarLoop]: Abstraction has 3469 states and 12875 transitions. [2022-11-20 20:43:41,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 12875 transitions. [2022-11-20 20:43:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:43:41,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:41,979 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1] [2022-11-20 20:43:41,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:42,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:42,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:42,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:42,580 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:43:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 242472860, now seen corresponding path program 1 times [2022-11-20 20:43:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:42,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820677424] [2022-11-20 20:43:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:42,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:42,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:42,582 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:42,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 20:43:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:43:42,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:42,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 20:43:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:43,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:45,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:43:45,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820677424] [2022-11-20 20:43:45,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820677424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:45,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2115361950] [2022-11-20 20:43:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:45,103 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:43:45,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:43:45,104 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:43:45,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-20 20:43:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:43:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:45,470 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 [2022-11-20 20:43:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:45,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:46,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2115361950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545514369] [2022-11-20 20:43:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:43:46,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:46,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:46,476 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:46,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 20:43:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:43:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:43:46,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:46,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:43:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:46,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:47,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545514369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:47,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:43:47,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2022-11-20 20:43:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900009657] [2022-11-20 20:43:47,198 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:47,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:43:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:47,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:43:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:43:47,199 INFO L87 Difference]: Start difference. First operand 3469 states and 12875 transitions. Second operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:43:52,060 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 [] [2022-11-20 20:43:54,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:56,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:58,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:00,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:02,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:07,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:09,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:11,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:13,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:15,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:17,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:27,700 INFO L93 Difference]: Finished difference Result 29398 states and 110592 transitions. [2022-11-20 20:44:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 20:44:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:44:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:27,801 INFO L225 Difference]: With dead ends: 29398 [2022-11-20 20:44:27,801 INFO L226 Difference]: Without dead ends: 29398 [2022-11-20 20:44:27,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:44:27,802 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1484 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3382 mSolverCounterSat, 149 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3382 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:27,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 0 Invalid, 3542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3382 Invalid, 11 Unknown, 0 Unchecked, 35.4s Time] [2022-11-20 20:44:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29398 states. [2022-11-20 20:44:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29398 to 3484. [2022-11-20 20:44:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3330 states have (on average 3.8714714714714713) internal successors, (12892), 3483 states have internal predecessors, (12892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 12892 transitions. [2022-11-20 20:44:28,160 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 12892 transitions. Word has length 9 [2022-11-20 20:44:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:28,160 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 12892 transitions. [2022-11-20 20:44:28,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 12892 transitions. [2022-11-20 20:44:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:44:28,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:28,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:28,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:28,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:28,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:28,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:44:28,763 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash -720541993, now seen corresponding path program 1 times [2022-11-20 20:44:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:28,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103600181] [2022-11-20 20:44:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:28,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:28,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:28,767 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:28,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 20:44:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:44:28,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:29,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:29,079 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:44:29,079 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:44:29,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:29,242 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:44:29,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:44:29,766 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 20:44:29,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 20:44:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:30,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:30,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103600181] [2022-11-20 20:44:30,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103600181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:30,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:30,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:30,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564837440] [2022-11-20 20:44:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:30,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:30,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:30,121 INFO L87 Difference]: Start difference. First operand 3484 states and 12892 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) [2022-11-20 20:44:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:30,521 INFO L93 Difference]: Finished difference Result 3493 states and 12910 transitions. [2022-11-20 20:44:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:44:30,522 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 [2022-11-20 20:44:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:30,533 INFO L225 Difference]: With dead ends: 3493 [2022-11-20 20:44:30,533 INFO L226 Difference]: Without dead ends: 3493 [2022-11-20 20:44:30,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:30,534 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:30,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-11-20 20:44:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2022-11-20 20:44:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 3483. [2022-11-20 20:44:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3329 states have (on average 3.872033643736858) internal successors, (12890), 3482 states have internal predecessors, (12890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 12890 transitions. [2022-11-20 20:44:30,614 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 12890 transitions. Word has length 9 [2022-11-20 20:44:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:30,614 INFO L495 AbstractCegarLoop]: Abstraction has 3483 states and 12890 transitions. [2022-11-20 20:44:30,614 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) [2022-11-20 20:44:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 12890 transitions. [2022-11-20 20:44:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:44:30,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:30,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:30,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:30,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:30,816 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:30,816 INFO L85 PathProgramCache]: Analyzing trace with hash -705589700, now seen corresponding path program 1 times [2022-11-20 20:44:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:30,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173135530] [2022-11-20 20:44:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:30,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:30,818 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:30,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 20:44:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:31,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:44:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:31,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:31,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:31,141 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:44:31,141 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:44:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:31,323 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:44:31,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:44:31,788 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:31,788 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 [2022-11-20 20:44:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:32,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:32,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:32,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173135530] [2022-11-20 20:44:32,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173135530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:32,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:32,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:32,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915797732] [2022-11-20 20:44:32,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:32,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:32,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:32,016 INFO L87 Difference]: Start difference. First operand 3483 states and 12890 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) [2022-11-20 20:44:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:32,328 INFO L93 Difference]: Finished difference Result 3501 states and 12927 transitions. [2022-11-20 20:44:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:44:32,329 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 [2022-11-20 20:44:32,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:32,338 INFO L225 Difference]: With dead ends: 3501 [2022-11-20 20:44:32,339 INFO L226 Difference]: Without dead ends: 3501 [2022-11-20 20:44:32,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:32,339 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:32,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-11-20 20:44:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2022-11-20 20:44:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 3493. [2022-11-20 20:44:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3339 states have (on average 3.866726564839772) internal successors, (12911), 3492 states have internal predecessors, (12911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 12911 transitions. [2022-11-20 20:44:32,404 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 12911 transitions. Word has length 9 [2022-11-20 20:44:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:32,405 INFO L495 AbstractCegarLoop]: Abstraction has 3493 states and 12911 transitions. [2022-11-20 20:44:32,405 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) [2022-11-20 20:44:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 12911 transitions. [2022-11-20 20:44:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:44:32,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:32,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:32,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:32,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:32,619 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:32,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash 447619910, now seen corresponding path program 1 times [2022-11-20 20:44:32,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:32,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003226] [2022-11-20 20:44:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:32,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:32,621 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:32,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 20:44:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:32,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:44:32,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:32,914 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:32,915 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 [2022-11-20 20:44:32,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:32,973 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 [2022-11-20 20:44:33,024 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:33,025 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 [2022-11-20 20:44:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:33,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:33,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003226] [2022-11-20 20:44:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:33,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:33,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752281841] [2022-11-20 20:44:33,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:33,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:33,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:33,110 INFO L87 Difference]: Start difference. First operand 3493 states and 12911 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) [2022-11-20 20:44:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:33,600 INFO L93 Difference]: Finished difference Result 3501 states and 12928 transitions. [2022-11-20 20:44:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:33,601 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 [2022-11-20 20:44:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:33,612 INFO L225 Difference]: With dead ends: 3501 [2022-11-20 20:44:33,612 INFO L226 Difference]: Without dead ends: 3501 [2022-11-20 20:44:33,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:44:33,613 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:33,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 20:44:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2022-11-20 20:44:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 3501. [2022-11-20 20:44:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3347 states have (on average 3.8625634896922616) internal successors, (12928), 3500 states have internal predecessors, (12928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 12928 transitions. [2022-11-20 20:44:33,687 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 12928 transitions. Word has length 9 [2022-11-20 20:44:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:33,687 INFO L495 AbstractCegarLoop]: Abstraction has 3501 states and 12928 transitions. [2022-11-20 20:44:33,687 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) [2022-11-20 20:44:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 12928 transitions. [2022-11-20 20:44:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:44:33,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:33,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:33,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:33,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:33,893 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:33,893 INFO L85 PathProgramCache]: Analyzing trace with hash 453767489, now seen corresponding path program 1 times [2022-11-20 20:44:33,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:33,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066694326] [2022-11-20 20:44:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:33,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:33,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:33,894 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:33,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 20:44:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:34,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:44:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:34,129 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:34,129 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 [2022-11-20 20:44:34,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:34,173 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 [2022-11-20 20:44:34,210 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:34,210 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 [2022-11-20 20:44:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:34,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:34,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:34,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066694326] [2022-11-20 20:44:34,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066694326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:34,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:34,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:34,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314934468] [2022-11-20 20:44:34,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:34,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:34,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:34,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:34,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:34,284 INFO L87 Difference]: Start difference. First operand 3501 states and 12928 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) [2022-11-20 20:44:34,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:34,719 INFO L93 Difference]: Finished difference Result 3502 states and 12935 transitions. [2022-11-20 20:44:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:34,720 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 [2022-11-20 20:44:34,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:34,732 INFO L225 Difference]: With dead ends: 3502 [2022-11-20 20:44:34,732 INFO L226 Difference]: Without dead ends: 3502 [2022-11-20 20:44:34,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:44:34,733 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:34,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 20:44:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-11-20 20:44:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3502. [2022-11-20 20:44:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3348 states have (on average 3.8635005973715653) internal successors, (12935), 3501 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 12935 transitions. [2022-11-20 20:44:34,839 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 12935 transitions. Word has length 9 [2022-11-20 20:44:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:34,839 INFO L495 AbstractCegarLoop]: Abstraction has 3502 states and 12935 transitions. [2022-11-20 20:44:34,839 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) [2022-11-20 20:44:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 12935 transitions. [2022-11-20 20:44:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:44:34,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:34,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:34,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:35,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:35,055 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash 453767458, now seen corresponding path program 1 times [2022-11-20 20:44:35,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:35,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476186618] [2022-11-20 20:44:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:35,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:35,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:35,057 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:35,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-20 20:44:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:35,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:44:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:35,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:44:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:35,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:35,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:35,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476186618] [2022-11-20 20:44:35,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476186618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:35,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:35,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:44:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619271955] [2022-11-20 20:44:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:35,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:35,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:35,285 INFO L87 Difference]: Start difference. First operand 3502 states and 12935 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:35,767 INFO L93 Difference]: Finished difference Result 2593 states and 9490 transitions. [2022-11-20 20:44:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:44:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:44:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:35,776 INFO L225 Difference]: With dead ends: 2593 [2022-11-20 20:44:35,776 INFO L226 Difference]: Without dead ends: 2593 [2022-11-20 20:44:35,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:44:35,777 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:35,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:44:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-11-20 20:44:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2593. [2022-11-20 20:44:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2502 states have (on average 3.7929656274980017) internal successors, (9490), 2592 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 9490 transitions. [2022-11-20 20:44:35,827 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 9490 transitions. Word has length 9 [2022-11-20 20:44:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 9490 transitions. [2022-11-20 20:44:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 9490 transitions. [2022-11-20 20:44:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:44:35,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:35,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:35,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-20 20:44:36,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:36,029 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 453767459, now seen corresponding path program 1 times [2022-11-20 20:44:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093912356] [2022-11-20 20:44:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:36,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:36,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:36,031 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:36,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 20:44:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:44:36,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:36,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:44:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:36,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:36,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093912356] [2022-11-20 20:44:36,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093912356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:36,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:36,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:44:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860743895] [2022-11-20 20:44:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:36,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:44:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:44:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:44:36,382 INFO L87 Difference]: Start difference. First operand 2593 states and 9490 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2022-11-20 20:44:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:37,444 INFO L93 Difference]: Finished difference Result 4506 states and 16790 transitions. [2022-11-20 20:44:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 [2022-11-20 20:44:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:37,460 INFO L225 Difference]: With dead ends: 4506 [2022-11-20 20:44:37,460 INFO L226 Difference]: Without dead ends: 4506 [2022-11-20 20:44:37,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:44:37,461 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:37,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:44:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2022-11-20 20:44:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2830. [2022-11-20 20:44:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2739 states have (on average 3.9583789704271632) internal successors, (10842), 2829 states have internal predecessors, (10842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 10842 transitions. [2022-11-20 20:44:37,532 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 10842 transitions. Word has length 9 [2022-11-20 20:44:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:37,532 INFO L495 AbstractCegarLoop]: Abstraction has 2830 states and 10842 transitions. [2022-11-20 20:44:37,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2022-11-20 20:44:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 10842 transitions. [2022-11-20 20:44:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:44:37,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:37,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:37,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:37,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:37,735 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash 453767210, now seen corresponding path program 1 times [2022-11-20 20:44:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138912248] [2022-11-20 20:44:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:37,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:37,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:37,737 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:37,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 20:44:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:44:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:37,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:37,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:37,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138912248] [2022-11-20 20:44:37,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138912248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:37,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:37,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:44:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991738085] [2022-11-20 20:44:37,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:37,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:44:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:37,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:44:37,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:44:37,974 INFO L87 Difference]: Start difference. First operand 2830 states and 10842 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:38,859 INFO L93 Difference]: Finished difference Result 3020 states and 11320 transitions. [2022-11-20 20:44:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:38,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:44:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:38,870 INFO L225 Difference]: With dead ends: 3020 [2022-11-20 20:44:38,870 INFO L226 Difference]: Without dead ends: 3020 [2022-11-20 20:44:38,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:44:38,871 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:38,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:44:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2022-11-20 20:44:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2952. [2022-11-20 20:44:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2861 states have (on average 3.9105207969241524) internal successors, (11188), 2951 states have internal predecessors, (11188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:38,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 11188 transitions. [2022-11-20 20:44:38,942 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 11188 transitions. Word has length 9 [2022-11-20 20:44:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:38,943 INFO L495 AbstractCegarLoop]: Abstraction has 2952 states and 11188 transitions. [2022-11-20 20:44:38,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 11188 transitions. [2022-11-20 20:44:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:38,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:38,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:38,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:39,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:39,146 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash 298460015, now seen corresponding path program 1 times [2022-11-20 20:44:39,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:39,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074375973] [2022-11-20 20:44:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:39,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:39,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:39,148 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:39,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 20:44:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:39,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:44:39,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:44:39,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:39,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:39,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074375973] [2022-11-20 20:44:39,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074375973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:39,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:39,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:44:39,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891317944] [2022-11-20 20:44:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:39,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:44:39,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:44:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:44:39,429 INFO L87 Difference]: Start difference. First operand 2952 states and 11188 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) [2022-11-20 20:44:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:40,639 INFO L93 Difference]: Finished difference Result 5108 states and 19369 transitions. [2022-11-20 20:44:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:40,640 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 [2022-11-20 20:44:40,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:40,658 INFO L225 Difference]: With dead ends: 5108 [2022-11-20 20:44:40,658 INFO L226 Difference]: Without dead ends: 5108 [2022-11-20 20:44:40,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:44:40,658 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 180 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:40,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 0 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 20:44:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2022-11-20 20:44:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 3242. [2022-11-20 20:44:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3242 states, 3151 states have (on average 4.069184385909235) internal successors, (12822), 3241 states have internal predecessors, (12822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3242 states to 3242 states and 12822 transitions. [2022-11-20 20:44:40,789 INFO L78 Accepts]: Start accepts. Automaton has 3242 states and 12822 transitions. Word has length 10 [2022-11-20 20:44:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:40,789 INFO L495 AbstractCegarLoop]: Abstraction has 3242 states and 12822 transitions. [2022-11-20 20:44:40,789 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) [2022-11-20 20:44:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3242 states and 12822 transitions. [2022-11-20 20:44:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:40,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:40,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:40,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:40,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:40,990 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:40,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash 298661176, now seen corresponding path program 1 times [2022-11-20 20:44:40,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:40,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854008086] [2022-11-20 20:44:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:40,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:40,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:40,997 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:40,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 20:44:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:44:41,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:41,330 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:41,331 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 [2022-11-20 20:44:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:41,386 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 [2022-11-20 20:44:41,446 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:41,446 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 [2022-11-20 20:44:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:44:41,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:41,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:41,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854008086] [2022-11-20 20:44:41,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854008086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:41,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:41,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:41,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50946136] [2022-11-20 20:44:41,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:41,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:41,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:41,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:41,517 INFO L87 Difference]: Start difference. First operand 3242 states and 12822 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) [2022-11-20 20:44:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:41,924 INFO L93 Difference]: Finished difference Result 3266 states and 12868 transitions. [2022-11-20 20:44:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:41,925 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 [2022-11-20 20:44:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:41,934 INFO L225 Difference]: With dead ends: 3266 [2022-11-20 20:44:41,935 INFO L226 Difference]: Without dead ends: 3266 [2022-11-20 20:44:41,935 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 [2022-11-20 20:44:41,935 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:41,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:44:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2022-11-20 20:44:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 3262. [2022-11-20 20:44:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3171 states have (on average 4.055502995900347) internal successors, (12860), 3261 states have internal predecessors, (12860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 12860 transitions. [2022-11-20 20:44:41,995 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 12860 transitions. Word has length 10 [2022-11-20 20:44:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:41,995 INFO L495 AbstractCegarLoop]: Abstraction has 3262 states and 12860 transitions. [2022-11-20 20:44:41,995 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) [2022-11-20 20:44:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 12860 transitions. [2022-11-20 20:44:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:41,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:41,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:42,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:42,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:42,198 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 313613469, now seen corresponding path program 1 times [2022-11-20 20:44:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:42,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454599180] [2022-11-20 20:44:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:42,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:42,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:42,200 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:42,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 20:44:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:44:42,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:42,504 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:42,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 20:44:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:42,554 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 [2022-11-20 20:44:42,591 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:42,591 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 [2022-11-20 20:44:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:44:42,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:42,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:42,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454599180] [2022-11-20 20:44:42,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454599180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:42,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:42,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:42,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099874234] [2022-11-20 20:44:42,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:42,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:42,671 INFO L87 Difference]: Start difference. First operand 3262 states and 12860 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) [2022-11-20 20:44:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:43,031 INFO L93 Difference]: Finished difference Result 3265 states and 12865 transitions. [2022-11-20 20:44:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:43,032 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 [2022-11-20 20:44:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:43,040 INFO L225 Difference]: With dead ends: 3265 [2022-11-20 20:44:43,041 INFO L226 Difference]: Without dead ends: 3265 [2022-11-20 20:44:43,041 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 [2022-11-20 20:44:43,041 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:43,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:44:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-11-20 20:44:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 3261. [2022-11-20 20:44:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3261 states, 3170 states have (on average 4.05583596214511) internal successors, (12857), 3260 states have internal predecessors, (12857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3261 states to 3261 states and 12857 transitions. [2022-11-20 20:44:43,094 INFO L78 Accepts]: Start accepts. Automaton has 3261 states and 12857 transitions. Word has length 10 [2022-11-20 20:44:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:43,094 INFO L495 AbstractCegarLoop]: Abstraction has 3261 states and 12857 transitions. [2022-11-20 20:44:43,094 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) [2022-11-20 20:44:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3261 states and 12857 transitions. [2022-11-20 20:44:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:43,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:43,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:43,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:43,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:43,296 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:43,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1472970379, now seen corresponding path program 1 times [2022-11-20 20:44:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:43,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394339260] [2022-11-20 20:44:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:43,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:43,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:43,297 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:43,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 20:44:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:44:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:43,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:43,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:43,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394339260] [2022-11-20 20:44:43,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394339260] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:44:43,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:44:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-20 20:44:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288228791] [2022-11-20 20:44:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:43,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:44:43,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:44:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:44:43,651 INFO L87 Difference]: Start difference. First operand 3261 states and 12857 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:44,748 INFO L93 Difference]: Finished difference Result 4161 states and 15939 transitions. [2022-11-20 20:44:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:44:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:44,760 INFO L225 Difference]: With dead ends: 4161 [2022-11-20 20:44:44,760 INFO L226 Difference]: Without dead ends: 4161 [2022-11-20 20:44:44,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:44:44,761 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:44,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 20:44:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2022-11-20 20:44:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 3683. [2022-11-20 20:44:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3592 states have (on average 4.055400890868597) internal successors, (14567), 3682 states have internal predecessors, (14567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 14567 transitions. [2022-11-20 20:44:44,831 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 14567 transitions. Word has length 10 [2022-11-20 20:44:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:44,831 INFO L495 AbstractCegarLoop]: Abstraction has 3683 states and 14567 transitions. [2022-11-20 20:44:44,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 14567 transitions. [2022-11-20 20:44:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:44,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:44,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:44,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:45,032 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2021327433, now seen corresponding path program 1 times [2022-11-20 20:44:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62157688] [2022-11-20 20:44:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:45,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:45,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:45,034 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:45,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 20:44:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:45,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:44:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:45,356 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:45,356 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 [2022-11-20 20:44:45,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:45,400 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 [2022-11-20 20:44:45,448 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:45,449 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 [2022-11-20 20:44:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:44:45,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:45,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:45,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62157688] [2022-11-20 20:44:45,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62157688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:45,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:45,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:45,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551797041] [2022-11-20 20:44:45,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:45,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:45,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:45,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:45,517 INFO L87 Difference]: Start difference. First operand 3683 states and 14567 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) [2022-11-20 20:44:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:45,886 INFO L93 Difference]: Finished difference Result 3678 states and 14550 transitions. [2022-11-20 20:44:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:45,887 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 [2022-11-20 20:44:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:45,897 INFO L225 Difference]: With dead ends: 3678 [2022-11-20 20:44:45,897 INFO L226 Difference]: Without dead ends: 3678 [2022-11-20 20:44:45,898 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 [2022-11-20 20:44:45,898 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:45,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:44:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2022-11-20 20:44:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3665. [2022-11-20 20:44:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3574 states have (on average 4.063514269725798) internal successors, (14523), 3664 states have internal predecessors, (14523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14523 transitions. [2022-11-20 20:44:45,965 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14523 transitions. Word has length 10 [2022-11-20 20:44:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:45,965 INFO L495 AbstractCegarLoop]: Abstraction has 3665 states and 14523 transitions. [2022-11-20 20:44:45,965 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) [2022-11-20 20:44:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14523 transitions. [2022-11-20 20:44:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:45,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:45,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:45,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:46,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:46,166 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash -868117823, now seen corresponding path program 1 times [2022-11-20 20:44:46,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:46,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127094056] [2022-11-20 20:44:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:46,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:46,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:46,168 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:46,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 20:44:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:46,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:44:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:46,450 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:46,450 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 [2022-11-20 20:44:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:46,505 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 [2022-11-20 20:44:46,553 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:46,553 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 [2022-11-20 20:44:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:46,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:46,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:46,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127094056] [2022-11-20 20:44:46,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127094056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:46,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:46,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:46,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927059486] [2022-11-20 20:44:46,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:46,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:46,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:46,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:46,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:46,622 INFO L87 Difference]: Start difference. First operand 3665 states and 14523 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) [2022-11-20 20:44:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:46,961 INFO L93 Difference]: Finished difference Result 3670 states and 14525 transitions. [2022-11-20 20:44:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:46,962 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 [2022-11-20 20:44:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:46,972 INFO L225 Difference]: With dead ends: 3670 [2022-11-20 20:44:46,972 INFO L226 Difference]: Without dead ends: 3670 [2022-11-20 20:44:46,972 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 [2022-11-20 20:44:46,973 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:46,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:44:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-11-20 20:44:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3667. [2022-11-20 20:44:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 3576 states have (on average 4.059843400447427) internal successors, (14518), 3666 states have internal predecessors, (14518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 14518 transitions. [2022-11-20 20:44:47,038 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 14518 transitions. Word has length 10 [2022-11-20 20:44:47,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:47,038 INFO L495 AbstractCegarLoop]: Abstraction has 3667 states and 14518 transitions. [2022-11-20 20:44:47,038 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) [2022-11-20 20:44:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 14518 transitions. [2022-11-20 20:44:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:47,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:47,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:47,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:47,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:47,243 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:47,243 INFO L85 PathProgramCache]: Analyzing trace with hash -861970244, now seen corresponding path program 1 times [2022-11-20 20:44:47,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:47,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740724596] [2022-11-20 20:44:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:47,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:47,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:47,245 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:47,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 20:44:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:47,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:44:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:47,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:47,528 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:44:47,528 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:44:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:47,663 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:44:47,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:44:48,267 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 20:44:48,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 20:44:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:48,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:48,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740724596] [2022-11-20 20:44:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740724596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:48,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:48,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:48,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469998510] [2022-11-20 20:44:48,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:48,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:48,599 INFO L87 Difference]: Start difference. First operand 3667 states and 14518 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) [2022-11-20 20:44:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:48,841 INFO L93 Difference]: Finished difference Result 3673 states and 14532 transitions. [2022-11-20 20:44:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:44:48,842 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 [2022-11-20 20:44:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:48,850 INFO L225 Difference]: With dead ends: 3673 [2022-11-20 20:44:48,850 INFO L226 Difference]: Without dead ends: 3673 [2022-11-20 20:44:48,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:48,851 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:48,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-11-20 20:44:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2022-11-20 20:44:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 3662. [2022-11-20 20:44:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3662 states, 3571 states have (on average 4.062727527303276) internal successors, (14508), 3661 states have internal predecessors, (14508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3662 states to 3662 states and 14508 transitions. [2022-11-20 20:44:48,905 INFO L78 Accepts]: Start accepts. Automaton has 3662 states and 14508 transitions. Word has length 10 [2022-11-20 20:44:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:48,905 INFO L495 AbstractCegarLoop]: Abstraction has 3662 states and 14508 transitions. [2022-11-20 20:44:48,905 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) [2022-11-20 20:44:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3662 states and 14508 transitions. [2022-11-20 20:44:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:48,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:48,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:48,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:49,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:49,106 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:49,107 INFO L85 PathProgramCache]: Analyzing trace with hash -404596740, now seen corresponding path program 1 times [2022-11-20 20:44:49,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:49,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034490776] [2022-11-20 20:44:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:49,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:49,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:49,109 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:49,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 20:44:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:44:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:49,388 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:49,388 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 [2022-11-20 20:44:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:49,436 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 [2022-11-20 20:44:49,477 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:49,478 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 [2022-11-20 20:44:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:49,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:49,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034490776] [2022-11-20 20:44:49,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034490776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:49,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:49,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83310417] [2022-11-20 20:44:49,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:49,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:49,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:49,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:49,553 INFO L87 Difference]: Start difference. First operand 3662 states and 14508 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) [2022-11-20 20:44:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:49,928 INFO L93 Difference]: Finished difference Result 3685 states and 14556 transitions. [2022-11-20 20:44:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:49,929 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 [2022-11-20 20:44:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:49,939 INFO L225 Difference]: With dead ends: 3685 [2022-11-20 20:44:49,939 INFO L226 Difference]: Without dead ends: 3685 [2022-11-20 20:44:49,940 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 [2022-11-20 20:44:49,940 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:49,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:44:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2022-11-20 20:44:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3675. [2022-11-20 20:44:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3675 states, 3584 states have (on average 4.055245535714286) internal successors, (14534), 3674 states have internal predecessors, (14534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 14534 transitions. [2022-11-20 20:44:50,003 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 14534 transitions. Word has length 10 [2022-11-20 20:44:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:50,003 INFO L495 AbstractCegarLoop]: Abstraction has 3675 states and 14534 transitions. [2022-11-20 20:44:50,003 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) [2022-11-20 20:44:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 14534 transitions. [2022-11-20 20:44:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:50,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:50,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:50,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-20 20:44:50,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:50,207 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash -398449161, now seen corresponding path program 1 times [2022-11-20 20:44:50,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:50,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211311284] [2022-11-20 20:44:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:50,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:50,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:50,209 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:50,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-20 20:44:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:44:50,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:50,502 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:44:50,502 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:44:50,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:50,654 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:44:50,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:44:51,198 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:51,198 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 [2022-11-20 20:44:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:51,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:51,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:51,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211311284] [2022-11-20 20:44:51,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211311284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:51,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:51,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365897762] [2022-11-20 20:44:51,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:51,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:51,486 INFO L87 Difference]: Start difference. First operand 3675 states and 14534 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) [2022-11-20 20:44:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:51,846 INFO L93 Difference]: Finished difference Result 3681 states and 14548 transitions. [2022-11-20 20:44:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:44:51,846 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 [2022-11-20 20:44:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:51,856 INFO L225 Difference]: With dead ends: 3681 [2022-11-20 20:44:51,856 INFO L226 Difference]: Without dead ends: 3681 [2022-11-20 20:44:51,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:51,856 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:51,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-11-20 20:44:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2022-11-20 20:44:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3671. [2022-11-20 20:44:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3580 states have (on average 4.057541899441341) internal successors, (14526), 3670 states have internal predecessors, (14526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 14526 transitions. [2022-11-20 20:44:51,917 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 14526 transitions. Word has length 10 [2022-11-20 20:44:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:51,917 INFO L495 AbstractCegarLoop]: Abstraction has 3671 states and 14526 transitions. [2022-11-20 20:44:51,917 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) [2022-11-20 20:44:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 14526 transitions. [2022-11-20 20:44:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:51,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:51,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:51,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-20 20:44:52,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:52,118 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash 988558976, now seen corresponding path program 1 times [2022-11-20 20:44:52,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:52,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971185011] [2022-11-20 20:44:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:52,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:52,120 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:52,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-20 20:44:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:52,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:44:52,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:52,381 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:52,382 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 [2022-11-20 20:44:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:52,435 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 [2022-11-20 20:44:52,474 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:52,474 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 [2022-11-20 20:44:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:52,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:52,547 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971185011] [2022-11-20 20:44:52,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971185011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:52,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:52,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616811031] [2022-11-20 20:44:52,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:52,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:52,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:52,548 INFO L87 Difference]: Start difference. First operand 3671 states and 14526 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) [2022-11-20 20:44:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:52,936 INFO L93 Difference]: Finished difference Result 3681 states and 14545 transitions. [2022-11-20 20:44:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:52,937 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 [2022-11-20 20:44:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:52,946 INFO L225 Difference]: With dead ends: 3681 [2022-11-20 20:44:52,946 INFO L226 Difference]: Without dead ends: 3681 [2022-11-20 20:44:52,947 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 [2022-11-20 20:44:52,947 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:52,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:44:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2022-11-20 20:44:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3681. [2022-11-20 20:44:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3590 states have (on average 4.0515320334261835) internal successors, (14545), 3680 states have internal predecessors, (14545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 14545 transitions. [2022-11-20 20:44:53,015 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 14545 transitions. Word has length 10 [2022-11-20 20:44:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:53,015 INFO L495 AbstractCegarLoop]: Abstraction has 3681 states and 14545 transitions. [2022-11-20 20:44:53,015 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) [2022-11-20 20:44:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 14545 transitions. [2022-11-20 20:44:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:53,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:53,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:53,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-20 20:44:53,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:53,217 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash 991310381, now seen corresponding path program 1 times [2022-11-20 20:44:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:53,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784111506] [2022-11-20 20:44:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:53,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:53,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:53,218 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:53,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-20 20:44:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:53,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:44:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:53,476 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:53,476 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 [2022-11-20 20:44:53,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:53,519 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 20 [2022-11-20 20:44:53,556 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:53,557 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 [2022-11-20 20:44:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:53,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:53,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:53,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784111506] [2022-11-20 20:44:53,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784111506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:53,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:53,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:53,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37648268] [2022-11-20 20:44:53,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:53,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:53,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:53,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:53,632 INFO L87 Difference]: Start difference. First operand 3681 states and 14545 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) [2022-11-20 20:44:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:54,010 INFO L93 Difference]: Finished difference Result 3683 states and 14551 transitions. [2022-11-20 20:44:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:54,011 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 [2022-11-20 20:44:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:54,020 INFO L225 Difference]: With dead ends: 3683 [2022-11-20 20:44:54,021 INFO L226 Difference]: Without dead ends: 3683 [2022-11-20 20:44:54,021 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 [2022-11-20 20:44:54,021 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:54,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:44:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2022-11-20 20:44:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3683. [2022-11-20 20:44:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3592 states have (on average 4.0509465478841875) internal successors, (14551), 3682 states have internal predecessors, (14551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 14551 transitions. [2022-11-20 20:44:54,086 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 14551 transitions. Word has length 10 [2022-11-20 20:44:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:54,086 INFO L495 AbstractCegarLoop]: Abstraction has 3683 states and 14551 transitions. [2022-11-20 20:44:54,087 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) [2022-11-20 20:44:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 14551 transitions. [2022-11-20 20:44:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:44:54,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:54,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:54,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-20 20:44:54,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:54,289 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1181896118, now seen corresponding path program 1 times [2022-11-20 20:44:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:54,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574830644] [2022-11-20 20:44:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:54,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:54,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:54,291 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:54,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 20:44:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:54,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:44:54,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:54,567 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:44:54,568 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 [2022-11-20 20:44:54,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:54,610 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 [2022-11-20 20:44:54,653 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:44:54,653 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 [2022-11-20 20:44:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:54,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:54,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:54,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574830644] [2022-11-20 20:44:54,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574830644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:54,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:54,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:44:54,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797740516] [2022-11-20 20:44:54,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:54,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:44:54,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:44:54,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:44:54,726 INFO L87 Difference]: Start difference. First operand 3683 states and 14551 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) [2022-11-20 20:44:55,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:55,075 INFO L93 Difference]: Finished difference Result 3684 states and 14553 transitions. [2022-11-20 20:44:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:55,075 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 [2022-11-20 20:44:55,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:55,085 INFO L225 Difference]: With dead ends: 3684 [2022-11-20 20:44:55,085 INFO L226 Difference]: Without dead ends: 3684 [2022-11-20 20:44:55,085 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 [2022-11-20 20:44:55,086 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:55,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:44:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2022-11-20 20:44:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 3684. [2022-11-20 20:44:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3593 states have (on average 4.050375730587253) internal successors, (14553), 3683 states have internal predecessors, (14553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 14553 transitions. [2022-11-20 20:44:55,145 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 14553 transitions. Word has length 10 [2022-11-20 20:44:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:55,145 INFO L495 AbstractCegarLoop]: Abstraction has 3684 states and 14553 transitions. [2022-11-20 20:44:55,146 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) [2022-11-20 20:44:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 14553 transitions. [2022-11-20 20:44:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:44:55,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:55,147 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:55,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:55,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:55,359 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1597062014, now seen corresponding path program 2 times [2022-11-20 20:44:55,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:55,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440408628] [2022-11-20 20:44:55,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:44:55,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:55,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:55,361 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:55,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 20:44:55,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:44:55,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:44:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:44:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:55,708 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:44:55,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:44:55,847 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:44:55,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:44:55,996 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:44:55,996 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 [2022-11-20 20:44:56,004 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 [2022-11-20 20:44:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:44:56,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 20:44:56,060 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:44:56,060 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 [2022-11-20 20:44:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:44:56,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:56,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:56,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440408628] [2022-11-20 20:44:56,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440408628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:56,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:56,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:44:56,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009477845] [2022-11-20 20:44:56,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:44:56,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:44:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:44:56,139 INFO L87 Difference]: Start difference. First operand 3684 states and 14553 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2022-11-20 20:44:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:57,008 INFO L93 Difference]: Finished difference Result 4549 states and 16837 transitions. [2022-11-20 20:44:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:57,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 11 [2022-11-20 20:44:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:57,019 INFO L225 Difference]: With dead ends: 4549 [2022-11-20 20:44:57,019 INFO L226 Difference]: Without dead ends: 4549 [2022-11-20 20:44:57,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:44:57,020 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:57,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:44:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4549 states. [2022-11-20 20:44:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4549 to 2920. [2022-11-20 20:44:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2829 states have (on average 3.8914810887239306) internal successors, (11009), 2919 states have internal predecessors, (11009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 11009 transitions. [2022-11-20 20:44:57,072 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 11009 transitions. Word has length 11 [2022-11-20 20:44:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:57,072 INFO L495 AbstractCegarLoop]: Abstraction has 2920 states and 11009 transitions. [2022-11-20 20:44:57,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2022-11-20 20:44:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 11009 transitions. [2022-11-20 20:44:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:44:57,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:57,073 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:57,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:57,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:57,273 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:57,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash 564738451, now seen corresponding path program 2 times [2022-11-20 20:44:57,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:57,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097910034] [2022-11-20 20:44:57,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:44:57,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:57,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:57,275 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:57,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 20:44:57,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:44:57,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:44:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:44:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:57,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:44:57,550 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 20:44:57,645 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:44:57,646 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 [2022-11-20 20:44:57,669 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:44:57,670 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 [2022-11-20 20:44:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:44:57,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:44:57,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:57,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097910034] [2022-11-20 20:44:57,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097910034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:44:57,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:44:57,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:44:57,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386765777] [2022-11-20 20:44:57,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:44:57,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:44:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:44:57,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:44:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:44:57,771 INFO L87 Difference]: Start difference. First operand 2920 states and 11009 transitions. Second operand has 6 states, 5 states have (on average 1.8) 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) [2022-11-20 20:44:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:58,629 INFO L93 Difference]: Finished difference Result 3612 states and 13031 transitions. [2022-11-20 20:44:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:44:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) 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 11 [2022-11-20 20:44:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:58,638 INFO L225 Difference]: With dead ends: 3612 [2022-11-20 20:44:58,638 INFO L226 Difference]: Without dead ends: 3612 [2022-11-20 20:44:58,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:44:58,639 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:58,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:44:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2022-11-20 20:44:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 2526. [2022-11-20 20:44:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2435 states have (on average 3.809445585215606) internal successors, (9276), 2525 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:44:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 9276 transitions. [2022-11-20 20:44:58,684 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 9276 transitions. Word has length 11 [2022-11-20 20:44:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:58,684 INFO L495 AbstractCegarLoop]: Abstraction has 2526 states and 9276 transitions. [2022-11-20 20:44:58,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) 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) [2022-11-20 20:44:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 9276 transitions. [2022-11-20 20:44:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:44:58,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:58,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:58,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-20 20:44:58,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:58,886 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:44:58,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:58,886 INFO L85 PathProgramCache]: Analyzing trace with hash 662327700, now seen corresponding path program 1 times [2022-11-20 20:44:58,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:44:58,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863004343] [2022-11-20 20:44:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:58,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:44:58,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:44:58,887 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:44:58,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 20:44:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:59,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:44:59,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:59,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:59,403 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:59,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863004343] [2022-11-20 20:44:59,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863004343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:44:59,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1061794881] [2022-11-20 20:44:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:44:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:44:59,405 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:44:59,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-20 20:44:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:59,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:44:59,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:59,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:44:59,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1061794881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:44:59,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831975538] [2022-11-20 20:44:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:44:59,890 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:44:59,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-20 20:45:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:45:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:45:00,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:45:00,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831975538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:00,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:45:00,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 23 [2022-11-20 20:45:00,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052634832] [2022-11-20 20:45:00,528 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:45:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:00,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:45:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:45:00,529 INFO L87 Difference]: Start difference. First operand 2526 states and 9276 transitions. Second operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:13,088 INFO L93 Difference]: Finished difference Result 9441 states and 32003 transitions. [2022-11-20 20:45:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 20:45:13,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:13,111 INFO L225 Difference]: With dead ends: 9441 [2022-11-20 20:45:13,112 INFO L226 Difference]: Without dead ends: 9441 [2022-11-20 20:45:13,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 20:45:13,113 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1185 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4042 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 4042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:13,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 0 Invalid, 4099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 4042 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-11-20 20:45:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9441 states. [2022-11-20 20:45:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9441 to 3428. [2022-11-20 20:45:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3337 states have (on average 3.831285585855559) internal successors, (12785), 3427 states have internal predecessors, (12785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12785 transitions. [2022-11-20 20:45:13,261 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12785 transitions. Word has length 11 [2022-11-20 20:45:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:13,262 INFO L495 AbstractCegarLoop]: Abstraction has 3428 states and 12785 transitions. [2022-11-20 20:45:13,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12785 transitions. [2022-11-20 20:45:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:13,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:13,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:13,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-20 20:45:13,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-20 20:45:13,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-11-20 20:45:13,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:45:13,864 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:13,865 INFO L85 PathProgramCache]: Analyzing trace with hash 668556923, now seen corresponding path program 1 times [2022-11-20 20:45:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:13,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689225344] [2022-11-20 20:45:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:13,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:13,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:13,867 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:13,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 20:45:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:14,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:45:14,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:14,205 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:45:14,205 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 [2022-11-20 20:45:14,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:14,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 20:45:14,304 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:45:14,305 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 [2022-11-20 20:45:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:45:14,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:14,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689225344] [2022-11-20 20:45:14,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689225344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:14,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:14,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266962096] [2022-11-20 20:45:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:14,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:14,384 INFO L87 Difference]: Start difference. First operand 3428 states and 12785 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:14,736 INFO L93 Difference]: Finished difference Result 3430 states and 12787 transitions. [2022-11-20 20:45:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:45:14,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:14,745 INFO L225 Difference]: With dead ends: 3430 [2022-11-20 20:45:14,745 INFO L226 Difference]: Without dead ends: 3430 [2022-11-20 20:45:14,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:14,746 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:14,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:45:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2022-11-20 20:45:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3425. [2022-11-20 20:45:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3334 states have (on average 3.8320335932813436) internal successors, (12776), 3424 states have internal predecessors, (12776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 12776 transitions. [2022-11-20 20:45:14,796 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 12776 transitions. Word has length 11 [2022-11-20 20:45:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:14,797 INFO L495 AbstractCegarLoop]: Abstraction has 3425 states and 12776 transitions. [2022-11-20 20:45:14,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 12776 transitions. [2022-11-20 20:45:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:14,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:14,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:14,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-20 20:45:14,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:14,998 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1132078006, now seen corresponding path program 1 times [2022-11-20 20:45:14,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:14,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112460290] [2022-11-20 20:45:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:14,999 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 [2022-11-20 20:45:14,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:15,000 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:15,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 20:45:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:45:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:15,331 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:45:15,331 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 [2022-11-20 20:45:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:15,379 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 [2022-11-20 20:45:15,414 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:45:15,415 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 [2022-11-20 20:45:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:45:15,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:15,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112460290] [2022-11-20 20:45:15,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112460290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:15,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:15,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:15,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699352728] [2022-11-20 20:45:15,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:15,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:15,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:15,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:15,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:15,493 INFO L87 Difference]: Start difference. First operand 3425 states and 12776 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:15,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:15,812 INFO L93 Difference]: Finished difference Result 3429 states and 12782 transitions. [2022-11-20 20:45:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:45:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:15,821 INFO L225 Difference]: With dead ends: 3429 [2022-11-20 20:45:15,821 INFO L226 Difference]: Without dead ends: 3429 [2022-11-20 20:45:15,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:15,821 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:15,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:45:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2022-11-20 20:45:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 3424. [2022-11-20 20:45:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3333 states have (on average 3.8316831683168315) internal successors, (12771), 3423 states have internal predecessors, (12771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 12771 transitions. [2022-11-20 20:45:15,872 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 12771 transitions. Word has length 11 [2022-11-20 20:45:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:15,872 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 12771 transitions. [2022-11-20 20:45:15,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 12771 transitions. [2022-11-20 20:45:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:15,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:15,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:15,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:16,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:16,074 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1132077727, now seen corresponding path program 1 times [2022-11-20 20:45:16,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:16,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172344176] [2022-11-20 20:45:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:16,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:16,076 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:16,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 20:45:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:45:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:16,513 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:45:16,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:45:16,648 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:45:16,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:45:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:16,791 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 [2022-11-20 20:45:16,810 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:45:16,810 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 [2022-11-20 20:45:16,867 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:45:16,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:45:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:17,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:19,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:19,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172344176] [2022-11-20 20:45:19,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172344176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:19,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [429304305] [2022-11-20 20:45:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:19,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:45:19,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:45:19,044 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:45:19,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-20 20:45:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:45:19,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:19,629 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:45:19,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:45:19,776 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:45:19,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:45:19,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:19,976 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 [2022-11-20 20:45:19,986 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:45:19,986 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 [2022-11-20 20:45:20,039 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:45:20,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:45:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:20,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:22,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [429304305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:22,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043715619] [2022-11-20 20:45:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:22,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:45:22,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:45:22,274 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:45:22,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-20 20:45:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:22,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:45:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:22,643 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:45:22,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:45:22,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:22,773 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 [2022-11-20 20:45:22,785 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:45:22,785 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 [2022-11-20 20:45:22,850 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:45:22,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:45:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:23,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:23,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:45:23,956 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 51 treesize of output 75 [2022-11-20 20:45:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:26,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043715619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:26,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:45:26,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 19 [2022-11-20 20:45:26,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899224504] [2022-11-20 20:45:26,766 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:26,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:45:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:26,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:45:26,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2022-11-20 20:45:26,768 INFO L87 Difference]: Start difference. First operand 3424 states and 12771 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:30,032 INFO L93 Difference]: Finished difference Result 5296 states and 17920 transitions. [2022-11-20 20:45:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:45:30,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:30,046 INFO L225 Difference]: With dead ends: 5296 [2022-11-20 20:45:30,046 INFO L226 Difference]: Without dead ends: 5296 [2022-11-20 20:45:30,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=127, Invalid=522, Unknown=1, NotChecked=0, Total=650 [2022-11-20 20:45:30,046 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:30,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 504 Invalid, 0 Unknown, 400 Unchecked, 2.6s Time] [2022-11-20 20:45:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2022-11-20 20:45:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 3436. [2022-11-20 20:45:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3345 states have (on average 3.825710014947683) internal successors, (12797), 3435 states have internal predecessors, (12797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 12797 transitions. [2022-11-20 20:45:30,118 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 12797 transitions. Word has length 11 [2022-11-20 20:45:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:30,118 INFO L495 AbstractCegarLoop]: Abstraction has 3436 states and 12797 transitions. [2022-11-20 20:45:30,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 12797 transitions. [2022-11-20 20:45:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:30,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:30,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:30,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-20 20:45:30,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:30,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:30,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:45:30,720 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1757206497, now seen corresponding path program 1 times [2022-11-20 20:45:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:30,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621171985] [2022-11-20 20:45:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:30,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:30,722 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:30,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 20:45:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:45:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:31,088 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:45:31,089 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 [2022-11-20 20:45:31,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:31,132 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 [2022-11-20 20:45:31,184 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:45:31,184 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 [2022-11-20 20:45:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:45:31,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:31,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:31,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621171985] [2022-11-20 20:45:31,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621171985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:31,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:31,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297984914] [2022-11-20 20:45:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:31,254 INFO L87 Difference]: Start difference. First operand 3436 states and 12797 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:31,625 INFO L93 Difference]: Finished difference Result 3436 states and 12793 transitions. [2022-11-20 20:45:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:45:31,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:31,634 INFO L225 Difference]: With dead ends: 3436 [2022-11-20 20:45:31,635 INFO L226 Difference]: Without dead ends: 3436 [2022-11-20 20:45:31,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:31,635 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:31,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:45:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2022-11-20 20:45:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3433. [2022-11-20 20:45:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3342 states have (on average 3.8258527827648114) internal successors, (12786), 3432 states have internal predecessors, (12786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 12786 transitions. [2022-11-20 20:45:31,710 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 12786 transitions. Word has length 11 [2022-11-20 20:45:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:31,710 INFO L495 AbstractCegarLoop]: Abstraction has 3433 states and 12786 transitions. [2022-11-20 20:45:31,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 12786 transitions. [2022-11-20 20:45:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:31,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:31,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:31,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-20 20:45:31,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:31,912 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:31,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:31,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1763354076, now seen corresponding path program 1 times [2022-11-20 20:45:31,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:31,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978188874] [2022-11-20 20:45:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:31,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:31,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:31,914 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:31,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 20:45:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:32,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:45:32,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:32,270 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:45:32,270 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 [2022-11-20 20:45:32,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:32,317 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 [2022-11-20 20:45:32,364 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:45:32,365 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 [2022-11-20 20:45:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:45:32,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:32,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:32,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978188874] [2022-11-20 20:45:32,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978188874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:32,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:32,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551091007] [2022-11-20 20:45:32,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:32,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:32,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:32,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:32,445 INFO L87 Difference]: Start difference. First operand 3433 states and 12786 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:32,792 INFO L93 Difference]: Finished difference Result 3429 states and 12768 transitions. [2022-11-20 20:45:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:45:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:32,802 INFO L225 Difference]: With dead ends: 3429 [2022-11-20 20:45:32,802 INFO L226 Difference]: Without dead ends: 3429 [2022-11-20 20:45:32,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:32,802 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:32,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:45:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2022-11-20 20:45:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 3415. [2022-11-20 20:45:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3324 states have (on average 3.832129963898917) internal successors, (12738), 3414 states have internal predecessors, (12738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 12738 transitions. [2022-11-20 20:45:32,878 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 12738 transitions. Word has length 11 [2022-11-20 20:45:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:32,878 INFO L495 AbstractCegarLoop]: Abstraction has 3415 states and 12738 transitions. [2022-11-20 20:45:32,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:32,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 12738 transitions. [2022-11-20 20:45:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:32,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:32,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:32,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-20 20:45:33,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:33,079 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:33,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1144605083, now seen corresponding path program 1 times [2022-11-20 20:45:33,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:33,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344679046] [2022-11-20 20:45:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:33,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:33,083 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:33,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 20:45:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:45:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:33,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:33,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:33,409 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:45:33,409 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:45:33,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:33,549 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:45:33,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:45:33,967 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:45:33,968 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 [2022-11-20 20:45:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:45:34,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:34,223 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:34,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344679046] [2022-11-20 20:45:34,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344679046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:34,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:34,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:34,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962149239] [2022-11-20 20:45:34,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:34,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:34,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:34,225 INFO L87 Difference]: Start difference. First operand 3415 states and 12738 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:34,516 INFO L93 Difference]: Finished difference Result 3435 states and 12776 transitions. [2022-11-20 20:45:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:45:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:34,525 INFO L225 Difference]: With dead ends: 3435 [2022-11-20 20:45:34,525 INFO L226 Difference]: Without dead ends: 3435 [2022-11-20 20:45:34,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:34,525 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:34,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-11-20 20:45:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-11-20 20:45:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3422. [2022-11-20 20:45:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3331 states have (on average 3.828580006004203) internal successors, (12753), 3421 states have internal predecessors, (12753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 12753 transitions. [2022-11-20 20:45:34,580 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 12753 transitions. Word has length 11 [2022-11-20 20:45:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:34,580 INFO L495 AbstractCegarLoop]: Abstraction has 3422 states and 12753 transitions. [2022-11-20 20:45:34,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 12753 transitions. [2022-11-20 20:45:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:34,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:34,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:34,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-20 20:45:34,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:34,787 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:34,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1141853678, now seen corresponding path program 1 times [2022-11-20 20:45:34,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:34,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963792128] [2022-11-20 20:45:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:34,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:34,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:34,789 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:34,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-20 20:45:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:35,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:45:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:35,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:35,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:35,125 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:45:35,126 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:45:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:35,280 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:45:35,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:45:35,914 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 20:45:35,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 20:45:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:45:36,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:36,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:36,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963792128] [2022-11-20 20:45:36,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963792128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:36,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:36,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:36,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587062633] [2022-11-20 20:45:36,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:36,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:36,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:36,489 INFO L87 Difference]: Start difference. First operand 3422 states and 12753 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:36,768 INFO L93 Difference]: Finished difference Result 3433 states and 12780 transitions. [2022-11-20 20:45:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:45:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:36,778 INFO L225 Difference]: With dead ends: 3433 [2022-11-20 20:45:36,778 INFO L226 Difference]: Without dead ends: 3433 [2022-11-20 20:45:36,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:36,779 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:36,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-11-20 20:45:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3433 states. [2022-11-20 20:45:36,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3433 to 3420. [2022-11-20 20:45:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3329 states have (on average 3.829678582156804) internal successors, (12749), 3419 states have internal predecessors, (12749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 12749 transitions. [2022-11-20 20:45:36,853 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 12749 transitions. Word has length 11 [2022-11-20 20:45:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:36,853 INFO L495 AbstractCegarLoop]: Abstraction has 3420 states and 12749 transitions. [2022-11-20 20:45:36,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 12749 transitions. [2022-11-20 20:45:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:36,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:36,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:36,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-20 20:45:37,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:37,055 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash -951267941, now seen corresponding path program 1 times [2022-11-20 20:45:37,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:37,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766609852] [2022-11-20 20:45:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:37,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:37,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:37,056 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:37,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 20:45:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:45:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:37,391 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:45:37,391 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:45:37,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:37,536 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:45:37,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:45:38,018 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 20:45:38,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 20:45:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:45:38,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:38,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:38,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766609852] [2022-11-20 20:45:38,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766609852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:38,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:38,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:38,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807134266] [2022-11-20 20:45:38,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:38,439 INFO L87 Difference]: Start difference. First operand 3420 states and 12749 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:38,715 INFO L93 Difference]: Finished difference Result 3427 states and 12764 transitions. [2022-11-20 20:45:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:45:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:38,724 INFO L225 Difference]: With dead ends: 3427 [2022-11-20 20:45:38,724 INFO L226 Difference]: Without dead ends: 3427 [2022-11-20 20:45:38,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:38,725 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:38,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-11-20 20:45:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2022-11-20 20:45:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3414. [2022-11-20 20:45:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3323 states have (on average 3.832681312067409) internal successors, (12736), 3413 states have internal predecessors, (12736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 12736 transitions. [2022-11-20 20:45:38,782 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 12736 transitions. Word has length 11 [2022-11-20 20:45:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:38,782 INFO L495 AbstractCegarLoop]: Abstraction has 3414 states and 12736 transitions. [2022-11-20 20:45:38,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 12736 transitions. [2022-11-20 20:45:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:38,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:38,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:38,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-20 20:45:38,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:38,983 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash 339646602, now seen corresponding path program 1 times [2022-11-20 20:45:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840689839] [2022-11-20 20:45:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:38,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:38,986 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:38,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 20:45:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:39,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:45:39,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:39,330 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:45:39,330 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:45:39,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:39,479 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:45:39,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:45:40,039 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:45:40,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 20:45:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:45:40,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:40,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:40,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840689839] [2022-11-20 20:45:40,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840689839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:40,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:40,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:40,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688544144] [2022-11-20 20:45:40,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:40,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:40,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:40,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:40,324 INFO L87 Difference]: Start difference. First operand 3414 states and 12736 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:40,601 INFO L93 Difference]: Finished difference Result 3444 states and 12795 transitions. [2022-11-20 20:45:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:45:40,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:40,610 INFO L225 Difference]: With dead ends: 3444 [2022-11-20 20:45:40,610 INFO L226 Difference]: Without dead ends: 3444 [2022-11-20 20:45:40,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:40,610 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:40,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-11-20 20:45:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2022-11-20 20:45:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3431. [2022-11-20 20:45:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3340 states have (on average 3.8239520958083832) internal successors, (12772), 3430 states have internal predecessors, (12772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 12772 transitions. [2022-11-20 20:45:40,662 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 12772 transitions. Word has length 11 [2022-11-20 20:45:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:40,663 INFO L495 AbstractCegarLoop]: Abstraction has 3431 states and 12772 transitions. [2022-11-20 20:45:40,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 12772 transitions. [2022-11-20 20:45:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:40,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:40,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:40,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-20 20:45:40,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:40,864 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash 342398007, now seen corresponding path program 1 times [2022-11-20 20:45:40,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:40,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350802282] [2022-11-20 20:45:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:40,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:40,866 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:40,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-20 20:45:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:41,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:45:41,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:41,213 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:45:41,213 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:45:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:41,358 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:45:41,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:45:41,888 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 20:45:41,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 20:45:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:45:42,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:42,417 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:42,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350802282] [2022-11-20 20:45:42,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350802282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:42,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:42,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:42,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848776853] [2022-11-20 20:45:42,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:42,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:42,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:42,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:42,418 INFO L87 Difference]: Start difference. First operand 3431 states and 12772 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:42,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:42,679 INFO L93 Difference]: Finished difference Result 3442 states and 12799 transitions. [2022-11-20 20:45:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:45:42,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:42,687 INFO L225 Difference]: With dead ends: 3442 [2022-11-20 20:45:42,687 INFO L226 Difference]: Without dead ends: 3442 [2022-11-20 20:45:42,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:42,688 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:42,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-20 20:45:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2022-11-20 20:45:42,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 3429. [2022-11-20 20:45:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3338 states have (on average 3.8250449370880766) internal successors, (12768), 3428 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12768 transitions. [2022-11-20 20:45:42,741 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12768 transitions. Word has length 11 [2022-11-20 20:45:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:42,742 INFO L495 AbstractCegarLoop]: Abstraction has 3429 states and 12768 transitions. [2022-11-20 20:45:42,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12768 transitions. [2022-11-20 20:45:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:42,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:42,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:42,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-20 20:45:42,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:42,943 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash 532983744, now seen corresponding path program 1 times [2022-11-20 20:45:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:42,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128163012] [2022-11-20 20:45:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:42,945 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:42,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 20:45:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:45:43,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:43,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:43,314 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:45:43,314 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:45:43,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:43,458 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:45:43,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:45:44,369 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 20:45:44,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 20:45:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:45:44,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:44,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:44,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128163012] [2022-11-20 20:45:44,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128163012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:44,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:44,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321455517] [2022-11-20 20:45:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:44,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:44,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:44,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:44,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:44,920 INFO L87 Difference]: Start difference. First operand 3429 states and 12768 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:45,187 INFO L93 Difference]: Finished difference Result 3436 states and 12783 transitions. [2022-11-20 20:45:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:45:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:45,195 INFO L225 Difference]: With dead ends: 3436 [2022-11-20 20:45:45,195 INFO L226 Difference]: Without dead ends: 3436 [2022-11-20 20:45:45,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:45,196 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:45,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-11-20 20:45:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2022-11-20 20:45:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3424. [2022-11-20 20:45:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3333 states have (on average 3.8274827482748273) internal successors, (12757), 3423 states have internal predecessors, (12757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 12757 transitions. [2022-11-20 20:45:45,250 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 12757 transitions. Word has length 11 [2022-11-20 20:45:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:45,251 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 12757 transitions. [2022-11-20 20:45:45,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 12757 transitions. [2022-11-20 20:45:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:45,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:45,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:45,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:45,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:45,464 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash 580552243, now seen corresponding path program 1 times [2022-11-20 20:45:45,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:45,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347885826] [2022-11-20 20:45:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:45,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:45,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:45,466 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:45,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 20:45:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:45:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:45,763 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:45:45,764 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 [2022-11-20 20:45:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:45,809 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 20 [2022-11-20 20:45:45,848 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:45:45,848 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 [2022-11-20 20:45:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:45,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:45,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:45,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347885826] [2022-11-20 20:45:45,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347885826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:45,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:45,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:45,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023210506] [2022-11-20 20:45:45,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:45,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:45,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:45,932 INFO L87 Difference]: Start difference. First operand 3424 states and 12757 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:46,295 INFO L93 Difference]: Finished difference Result 3437 states and 12784 transitions. [2022-11-20 20:45:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:45:46,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:46,304 INFO L225 Difference]: With dead ends: 3437 [2022-11-20 20:45:46,305 INFO L226 Difference]: Without dead ends: 3437 [2022-11-20 20:45:46,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:46,305 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:46,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:45:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2022-11-20 20:45:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3437. [2022-11-20 20:45:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3346 states have (on average 3.8206814106395695) internal successors, (12784), 3436 states have internal predecessors, (12784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 12784 transitions. [2022-11-20 20:45:46,357 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 12784 transitions. Word has length 11 [2022-11-20 20:45:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:46,357 INFO L495 AbstractCegarLoop]: Abstraction has 3437 states and 12784 transitions. [2022-11-20 20:45:46,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 12784 transitions. [2022-11-20 20:45:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:46,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:46,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:46,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:46,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:46,559 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:46,559 INFO L85 PathProgramCache]: Analyzing trace with hash 665856586, now seen corresponding path program 1 times [2022-11-20 20:45:46,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:46,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960334508] [2022-11-20 20:45:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:46,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:46,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:46,561 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:46,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-20 20:45:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:46,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:45:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:46,878 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:45:46,878 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 [2022-11-20 20:45:46,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:45:46,930 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 [2022-11-20 20:45:46,988 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:45:46,988 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 [2022-11-20 20:45:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:47,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:47,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:47,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960334508] [2022-11-20 20:45:47,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960334508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:47,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:47,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:45:47,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097594135] [2022-11-20 20:45:47,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:47,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:45:47,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:45:47,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:45:47,080 INFO L87 Difference]: Start difference. First operand 3437 states and 12784 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:47,475 INFO L93 Difference]: Finished difference Result 3439 states and 12788 transitions. [2022-11-20 20:45:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:45:47,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:45:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:47,483 INFO L225 Difference]: With dead ends: 3439 [2022-11-20 20:45:47,483 INFO L226 Difference]: Without dead ends: 3439 [2022-11-20 20:45:47,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:47,484 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:47,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:45:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3439 states. [2022-11-20 20:45:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3439 to 3439. [2022-11-20 20:45:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3348 states have (on average 3.8195937873357226) internal successors, (12788), 3438 states have internal predecessors, (12788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 12788 transitions. [2022-11-20 20:45:47,541 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 12788 transitions. Word has length 11 [2022-11-20 20:45:47,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:47,541 INFO L495 AbstractCegarLoop]: Abstraction has 3439 states and 12788 transitions. [2022-11-20 20:45:47,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 12788 transitions. [2022-11-20 20:45:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:47,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:47,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:47,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-20 20:45:47,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:47,742 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2010303840, now seen corresponding path program 1 times [2022-11-20 20:45:47,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:47,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54756503] [2022-11-20 20:45:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:47,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:47,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:47,744 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:47,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 20:45:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:47,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:45:47,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:47,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:45:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:48,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:48,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54756503] [2022-11-20 20:45:48,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54756503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:48,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:48,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:45:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193847655] [2022-11-20 20:45:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:48,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:45:48,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:45:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:48,095 INFO L87 Difference]: Start difference. First operand 3439 states and 12788 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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) [2022-11-20 20:45:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:48,875 INFO L93 Difference]: Finished difference Result 4932 states and 18688 transitions. [2022-11-20 20:45:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:45:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 [2022-11-20 20:45:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:48,888 INFO L225 Difference]: With dead ends: 4932 [2022-11-20 20:45:48,889 INFO L226 Difference]: Without dead ends: 4932 [2022-11-20 20:45:48,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:45:48,889 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:48,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:45:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2022-11-20 20:45:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 3936. [2022-11-20 20:45:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3845 states have (on average 4.095708712613784) internal successors, (15748), 3935 states have internal predecessors, (15748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 15748 transitions. [2022-11-20 20:45:48,963 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 15748 transitions. Word has length 11 [2022-11-20 20:45:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:48,964 INFO L495 AbstractCegarLoop]: Abstraction has 3936 states and 15748 transitions. [2022-11-20 20:45:48,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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) [2022-11-20 20:45:48,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 15748 transitions. [2022-11-20 20:45:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:45:48,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:48,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:45:48,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:49,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:49,165 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:49,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2010303950, now seen corresponding path program 1 times [2022-11-20 20:45:49,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:49,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923485978] [2022-11-20 20:45:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:45:49,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:49,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:49,166 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:49,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 20:45:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:45:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:45:49,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:49,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:45:49,472 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:49,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923485978] [2022-11-20 20:45:49,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923485978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:45:49,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:45:49,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:45:49,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161834413] [2022-11-20 20:45:49,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:45:49,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:45:49,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:49,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:45:49,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:49,473 INFO L87 Difference]: Start difference. First operand 3936 states and 15748 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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) [2022-11-20 20:45:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:50,438 INFO L93 Difference]: Finished difference Result 4230 states and 16432 transitions. [2022-11-20 20:45:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:45:50,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 [2022-11-20 20:45:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:50,450 INFO L225 Difference]: With dead ends: 4230 [2022-11-20 20:45:50,450 INFO L226 Difference]: Without dead ends: 4230 [2022-11-20 20:45:50,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:45:50,450 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:50,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:45:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2022-11-20 20:45:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4117. [2022-11-20 20:45:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4117 states, 4026 states have (on average 4.0240933929458516) internal successors, (16201), 4116 states have internal predecessors, (16201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:45:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4117 states to 4117 states and 16201 transitions. [2022-11-20 20:45:50,541 INFO L78 Accepts]: Start accepts. Automaton has 4117 states and 16201 transitions. Word has length 11 [2022-11-20 20:45:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:50,541 INFO L495 AbstractCegarLoop]: Abstraction has 4117 states and 16201 transitions. [2022-11-20 20:45:50,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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) [2022-11-20 20:45:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4117 states and 16201 transitions. [2022-11-20 20:45:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:45:50,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:50,542 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 20:45:50,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:50,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:50,751 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:45:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:50,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1210583962, now seen corresponding path program 3 times [2022-11-20 20:45:50,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:50,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150704474] [2022-11-20 20:45:50,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:45:50,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:45:50,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:50,752 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:45:50,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-20 20:45:51,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:45:51,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:45:51,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:45:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:51,196 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:45:51,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:45:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:51,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:55,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:45:55,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150704474] [2022-11-20 20:45:55,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150704474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:55,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1635826001] [2022-11-20 20:45:55,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:45:55,132 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:45:55,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:45:55,133 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:45:55,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-20 20:45:56,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:45:56,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:45:56,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:45:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:56,144 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:45:56,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:45:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:56,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:46:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:46:00,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1635826001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:46:00,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098898508] [2022-11-20 20:46:00,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:46:00,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:46:00,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:46:00,050 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:46:00,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-20 20:46:05,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:46:05,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:46:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:46:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:46:05,995 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:46:05,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:46:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:46:06,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:46:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:46:11,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098898508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:46:11,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:46:11,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-11-20 20:46:11,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382553344] [2022-11-20 20:46:11,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:46:11,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 20:46:11,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:46:11,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 20:46:11,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=1402, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 20:46:11,633 INFO L87 Difference]: Start difference. First operand 4117 states and 16201 transitions. Second operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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) [2022-11-20 20:46:26,156 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 [] [2022-11-20 20:46:28,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:30,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:32,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:34,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:36,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:38,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:40,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:42,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:44,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:46,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:48,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:50,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:52,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:54,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:56,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:58,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:00,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:02,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:04,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:06,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:08,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:10,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:12,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:14,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:16,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:21,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:23,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:25,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:27,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:29,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:31,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:33,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:35,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:37,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:39,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:41,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:43,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:45,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:47,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:49,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:51,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:53,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:55,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:57,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:59,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:48:01,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:48:03,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:48:05,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:48:07,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:48:09,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:48:11,687 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 [] [2022-11-20 20:48:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:48:33,005 INFO L93 Difference]: Finished difference Result 42858 states and 171463 transitions. [2022-11-20 20:48:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 20:48:33,007 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:48:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:48:33,201 INFO L225 Difference]: With dead ends: 42858 [2022-11-20 20:48:33,201 INFO L226 Difference]: Without dead ends: 42858 [2022-11-20 20:48:33,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=841, Invalid=2021, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 20:48:33,201 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5540 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7406 mSolverCounterSat, 470 mSolverCounterUnsat, 52 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5540 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 7406 IncrementalHoareTripleChecker+Invalid, 52 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:48:33,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5540 Valid, 0 Invalid, 7928 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [470 Valid, 7406 Invalid, 52 Unknown, 0 Unchecked, 126.9s Time] [2022-11-20 20:48:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42858 states. [2022-11-20 20:48:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42858 to 4147. [2022-11-20 20:48:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4147 states, 4056 states have (on average 4.009122287968442) internal successors, (16261), 4146 states have internal predecessors, (16261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 16261 transitions. [2022-11-20 20:48:33,659 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 16261 transitions. Word has length 12 [2022-11-20 20:48:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:48:33,660 INFO L495 AbstractCegarLoop]: Abstraction has 4147 states and 16261 transitions. [2022-11-20 20:48:33,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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) [2022-11-20 20:48:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 16261 transitions. [2022-11-20 20:48:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:48:33,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:48:33,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:48:33,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-20 20:48:33,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2022-11-20 20:48:34,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-20 20:48:34,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:48:34,277 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:48:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:48:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1965055718, now seen corresponding path program 1 times [2022-11-20 20:48:34,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:48:34,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749934379] [2022-11-20 20:48:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:48:34,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:48:34,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:48:34,280 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:48:34,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 20:48:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:48:34,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:48:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:48:34,878 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:48:34,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:48:35,069 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:48:35,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:48:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:48:35,227 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 [2022-11-20 20:48:35,239 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:48:35,240 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 [2022-11-20 20:48:35,379 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:48:35,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:48:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:48:35,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:48:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:48:39,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:48:39,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749934379] [2022-11-20 20:48:39,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749934379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:48:39,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [572742014] [2022-11-20 20:48:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:48:39,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:48:39,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:48:39,431 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:48:39,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-20 20:48:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:48:40,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:48:40,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:48:40,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:48:40,209 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:48:40,385 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:48:40,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:48:40,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:48:40,629 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 [2022-11-20 20:48:40,653 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:48:40,654 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 [2022-11-20 20:48:40,734 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:48:40,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:48:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:48:41,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:48:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:48:42,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [572742014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:48:42,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050269621] [2022-11-20 20:48:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:48:42,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:48:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:48:42,274 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:48:42,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-20 20:48:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:48:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:48:42,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:48:42,792 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:48:42,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:48:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:48:42,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 20:48:42,962 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:48:42,963 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 [2022-11-20 20:48:43,038 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:48:43,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:48:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:48:43,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:48:45,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:48:45,262 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 51 treesize of output 75 [2022-11-20 20:48:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:48:48,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050269621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:48:48,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:48:48,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 19 [2022-11-20 20:48:48,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991064606] [2022-11-20 20:48:48,096 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:48:48,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:48:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:48:48,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:48:48,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2022-11-20 20:48:48,097 INFO L87 Difference]: Start difference. First operand 4147 states and 16261 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:48:52,853 INFO L93 Difference]: Finished difference Result 6747 states and 24693 transitions. [2022-11-20 20:48:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:48:52,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:48:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:48:52,875 INFO L225 Difference]: With dead ends: 6747 [2022-11-20 20:48:52,875 INFO L226 Difference]: Without dead ends: 6747 [2022-11-20 20:48:52,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=142, Invalid=559, Unknown=1, NotChecked=0, Total=702 [2022-11-20 20:48:52,876 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 292 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 974 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:48:52,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 0 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 592 Invalid, 0 Unknown, 974 Unchecked, 3.8s Time] [2022-11-20 20:48:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6747 states. [2022-11-20 20:48:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6747 to 4689. [2022-11-20 20:48:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4689 states, 4598 states have (on average 3.9936929099608527) internal successors, (18363), 4688 states have internal predecessors, (18363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4689 states to 4689 states and 18363 transitions. [2022-11-20 20:48:52,994 INFO L78 Accepts]: Start accepts. Automaton has 4689 states and 18363 transitions. Word has length 12 [2022-11-20 20:48:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:48:52,994 INFO L495 AbstractCegarLoop]: Abstraction has 4689 states and 18363 transitions. [2022-11-20 20:48:52,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4689 states and 18363 transitions. [2022-11-20 20:48:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:48:52,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:48:52,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:48:53,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-20 20:48:53,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-20 20:48:53,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2022-11-20 20:48:53,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:48:53,597 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:48:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:48:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash -942724416, now seen corresponding path program 1 times [2022-11-20 20:48:53,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:48:53,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478058968] [2022-11-20 20:48:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:48:53,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:48:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:48:53,599 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:48:53,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 20:48:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:48:54,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:48:54,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:48:54,196 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 20:48:54,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 20:48:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:48:54,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 20:48:54,378 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:48:54,378 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 [2022-11-20 20:48:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:48:54,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:48:54,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:48:54,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478058968] [2022-11-20 20:48:54,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478058968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:48:54,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:48:54,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:48:54,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710829604] [2022-11-20 20:48:54,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:48:54,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:48:54,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:48:54,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:48:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:48:54,613 INFO L87 Difference]: Start difference. First operand 4689 states and 18363 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:48:55,055 INFO L93 Difference]: Finished difference Result 4693 states and 18377 transitions. [2022-11-20 20:48:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:48:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:48:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:48:55,070 INFO L225 Difference]: With dead ends: 4693 [2022-11-20 20:48:55,071 INFO L226 Difference]: Without dead ends: 4693 [2022-11-20 20:48:55,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:48:55,071 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:48:55,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-11-20 20:48:55,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2022-11-20 20:48:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4693. [2022-11-20 20:48:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4602 states have (on average 3.993263798348544) internal successors, (18377), 4692 states have internal predecessors, (18377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 18377 transitions. [2022-11-20 20:48:55,166 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 18377 transitions. Word has length 12 [2022-11-20 20:48:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:48:55,166 INFO L495 AbstractCegarLoop]: Abstraction has 4693 states and 18377 transitions. [2022-11-20 20:48:55,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 18377 transitions. [2022-11-20 20:48:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:48:55,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:48:55,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:48:55,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-20 20:48:55,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:48:55,368 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:48:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:48:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash -939927906, now seen corresponding path program 2 times [2022-11-20 20:48:55,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:48:55,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047204731] [2022-11-20 20:48:55,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:48:55,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:48:55,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:48:55,370 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:48:55,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 20:48:55,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:48:55,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:48:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:48:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:48:55,851 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 20:48:55,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 20:48:55,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:48:55,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 20:48:56,013 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:48:56,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 20:48:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:48:56,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:48:56,238 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:48:56,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047204731] [2022-11-20 20:48:56,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047204731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:48:56,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:48:56,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:48:56,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638119699] [2022-11-20 20:48:56,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:48:56,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:48:56,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:48:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:48:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:48:56,240 INFO L87 Difference]: Start difference. First operand 4693 states and 18377 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:48:56,701 INFO L93 Difference]: Finished difference Result 4695 states and 18385 transitions. [2022-11-20 20:48:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:48:56,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:48:56,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:48:56,716 INFO L225 Difference]: With dead ends: 4695 [2022-11-20 20:48:56,716 INFO L226 Difference]: Without dead ends: 4695 [2022-11-20 20:48:56,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:48:56,717 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:48:56,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 20:48:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-11-20 20:48:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4691. [2022-11-20 20:48:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4600 states have (on average 3.993695652173913) internal successors, (18371), 4690 states have internal predecessors, (18371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 18371 transitions. [2022-11-20 20:48:56,812 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 18371 transitions. Word has length 12 [2022-11-20 20:48:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:48:56,813 INFO L495 AbstractCegarLoop]: Abstraction has 4691 states and 18371 transitions. [2022-11-20 20:48:56,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 18371 transitions. [2022-11-20 20:48:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:48:56,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:48:56,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:48:56,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-20 20:48:57,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:48:57,014 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:48:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:48:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash -940148316, now seen corresponding path program 3 times [2022-11-20 20:48:57,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:48:57,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060511208] [2022-11-20 20:48:57,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:48:57,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:48:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:48:57,016 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:48:57,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 20:48:57,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:48:57,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:48:57,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:48:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:48:57,526 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 20:48:57,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 20:48:57,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:48:57,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 20:48:57,683 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:48:57,684 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 [2022-11-20 20:48:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:48:57,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:48:57,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:48:57,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060511208] [2022-11-20 20:48:57,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060511208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:48:57,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:48:57,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:48:57,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478880789] [2022-11-20 20:48:57,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:48:57,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:48:57,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:48:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:48:57,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:48:57,925 INFO L87 Difference]: Start difference. First operand 4691 states and 18371 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:48:58,390 INFO L93 Difference]: Finished difference Result 4691 states and 18369 transitions. [2022-11-20 20:48:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:48:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:48:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:48:58,405 INFO L225 Difference]: With dead ends: 4691 [2022-11-20 20:48:58,405 INFO L226 Difference]: Without dead ends: 4691 [2022-11-20 20:48:58,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:48:58,406 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:48:58,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-11-20 20:48:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-11-20 20:48:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4687. [2022-11-20 20:48:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4596 states have (on average 3.993690165361184) internal successors, (18355), 4686 states have internal predecessors, (18355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 18355 transitions. [2022-11-20 20:48:58,498 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 18355 transitions. Word has length 12 [2022-11-20 20:48:58,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:48:58,498 INFO L495 AbstractCegarLoop]: Abstraction has 4687 states and 18355 transitions. [2022-11-20 20:48:58,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 18355 transitions. [2022-11-20 20:48:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:48:58,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:48:58,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:48:58,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-20 20:48:58,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:48:58,700 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:48:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:48:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -940151757, now seen corresponding path program 1 times [2022-11-20 20:48:58,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:48:58,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308124510] [2022-11-20 20:48:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:48:58,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:48:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:48:58,702 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:48:58,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-20 20:48:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:48:59,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:48:59,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:48:59,168 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:48:59,168 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 [2022-11-20 20:48:59,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:48:59,233 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 [2022-11-20 20:48:59,296 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:48:59,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 20:48:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:48:59,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:48:59,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:48:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308124510] [2022-11-20 20:48:59,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308124510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:48:59,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:48:59,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:48:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607854669] [2022-11-20 20:48:59,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:48:59,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:48:59,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:48:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:48:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:48:59,396 INFO L87 Difference]: Start difference. First operand 4687 states and 18355 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:48:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:48:59,866 INFO L93 Difference]: Finished difference Result 4684 states and 18344 transitions. [2022-11-20 20:48:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:48:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:48:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:48:59,881 INFO L225 Difference]: With dead ends: 4684 [2022-11-20 20:48:59,881 INFO L226 Difference]: Without dead ends: 4684 [2022-11-20 20:48:59,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:48:59,882 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:48:59,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:48:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-11-20 20:49:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4684. [2022-11-20 20:49:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4593 states have (on average 3.99390376660135) internal successors, (18344), 4683 states have internal predecessors, (18344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 18344 transitions. [2022-11-20 20:49:00,023 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 18344 transitions. Word has length 12 [2022-11-20 20:49:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:00,023 INFO L495 AbstractCegarLoop]: Abstraction has 4684 states and 18344 transitions. [2022-11-20 20:49:00,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 18344 transitions. [2022-11-20 20:49:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:00,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:00,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:00,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:00,225 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:00,229 INFO L85 PathProgramCache]: Analyzing trace with hash -749566020, now seen corresponding path program 1 times [2022-11-20 20:49:00,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:00,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640796329] [2022-11-20 20:49:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:00,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:00,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:00,232 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:00,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 20:49:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:00,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:49:00,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:00,742 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:49:00,743 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 [2022-11-20 20:49:00,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:00,807 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 [2022-11-20 20:49:00,883 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:00,883 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 [2022-11-20 20:49:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:49:00,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:00,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:00,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640796329] [2022-11-20 20:49:00,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640796329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:00,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:00,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268456141] [2022-11-20 20:49:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:00,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:00,992 INFO L87 Difference]: Start difference. First operand 4684 states and 18344 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:01,521 INFO L93 Difference]: Finished difference Result 4687 states and 18350 transitions. [2022-11-20 20:49:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:01,537 INFO L225 Difference]: With dead ends: 4687 [2022-11-20 20:49:01,537 INFO L226 Difference]: Without dead ends: 4687 [2022-11-20 20:49:01,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:01,537 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:01,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-11-20 20:49:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2022-11-20 20:49:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 4687. [2022-11-20 20:49:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4596 states have (on average 3.99260226283725) internal successors, (18350), 4686 states have internal predecessors, (18350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 18350 transitions. [2022-11-20 20:49:01,635 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 18350 transitions. Word has length 12 [2022-11-20 20:49:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:01,636 INFO L495 AbstractCegarLoop]: Abstraction has 4687 states and 18350 transitions. [2022-11-20 20:49:01,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 18350 transitions. [2022-11-20 20:49:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:01,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:01,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:01,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:01,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:01,837 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:01,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash 541348523, now seen corresponding path program 1 times [2022-11-20 20:49:01,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:01,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71095206] [2022-11-20 20:49:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:01,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:01,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:01,839 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:01,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 20:49:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:02,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:49:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:02,346 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:49:02,346 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 [2022-11-20 20:49:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:02,414 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 [2022-11-20 20:49:02,466 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:02,466 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 [2022-11-20 20:49:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:49:02,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:02,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71095206] [2022-11-20 20:49:02,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71095206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:02,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:02,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043023264] [2022-11-20 20:49:02,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:02,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:02,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:02,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:02,578 INFO L87 Difference]: Start difference. First operand 4687 states and 18350 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:03,070 INFO L93 Difference]: Finished difference Result 4687 states and 18347 transitions. [2022-11-20 20:49:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:03,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:03,086 INFO L225 Difference]: With dead ends: 4687 [2022-11-20 20:49:03,086 INFO L226 Difference]: Without dead ends: 4687 [2022-11-20 20:49:03,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:03,087 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:03,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:49:03,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2022-11-20 20:49:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 4687. [2022-11-20 20:49:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4596 states have (on average 3.9919495213228893) internal successors, (18347), 4686 states have internal predecessors, (18347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 18347 transitions. [2022-11-20 20:49:03,180 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 18347 transitions. Word has length 12 [2022-11-20 20:49:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:03,180 INFO L495 AbstractCegarLoop]: Abstraction has 4687 states and 18347 transitions. [2022-11-20 20:49:03,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 18347 transitions. [2022-11-20 20:49:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:03,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:03,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:03,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:03,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:03,382 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash 544099928, now seen corresponding path program 1 times [2022-11-20 20:49:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:03,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389425491] [2022-11-20 20:49:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:03,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:03,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:03,387 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:03,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 20:49:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:03,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:49:03,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:03,891 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:49:03,892 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 [2022-11-20 20:49:03,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:03,959 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 [2022-11-20 20:49:04,010 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:04,010 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 [2022-11-20 20:49:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:49:04,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:04,128 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:04,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389425491] [2022-11-20 20:49:04,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389425491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:04,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:04,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152904655] [2022-11-20 20:49:04,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:04,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:04,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:04,129 INFO L87 Difference]: Start difference. First operand 4687 states and 18347 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:04,579 INFO L93 Difference]: Finished difference Result 4686 states and 18341 transitions. [2022-11-20 20:49:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:04,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:04,595 INFO L225 Difference]: With dead ends: 4686 [2022-11-20 20:49:04,595 INFO L226 Difference]: Without dead ends: 4686 [2022-11-20 20:49:04,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:04,595 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:04,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:49:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-11-20 20:49:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 4686. [2022-11-20 20:49:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 4595 states have (on average 3.991512513601741) internal successors, (18341), 4685 states have internal predecessors, (18341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 18341 transitions. [2022-11-20 20:49:04,691 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 18341 transitions. Word has length 12 [2022-11-20 20:49:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:04,691 INFO L495 AbstractCegarLoop]: Abstraction has 4686 states and 18341 transitions. [2022-11-20 20:49:04,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 18341 transitions. [2022-11-20 20:49:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:04,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:04,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:04,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:04,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:04,893 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:04,893 INFO L85 PathProgramCache]: Analyzing trace with hash 734674319, now seen corresponding path program 1 times [2022-11-20 20:49:04,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:04,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532952291] [2022-11-20 20:49:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:04,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:04,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:04,895 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:04,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 20:49:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:05,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:49:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:05,443 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:49:05,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:49:05,639 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:49:05,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:49:05,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:05,802 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 [2022-11-20 20:49:05,830 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:49:05,830 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 [2022-11-20 20:49:05,906 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:49:05,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:49:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:06,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:49:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:08,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532952291] [2022-11-20 20:49:08,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532952291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:49:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [939325116] [2022-11-20 20:49:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:08,667 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:49:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:49:08,668 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:49:08,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-20 20:49:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:49:09,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:09,462 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:49:09,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:49:09,656 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:49:09,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:49:09,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:09,912 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 [2022-11-20 20:49:09,925 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:49:09,925 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 [2022-11-20 20:49:09,995 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:49:09,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:49:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:10,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:49:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:11,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [939325116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:49:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540363922] [2022-11-20 20:49:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:11,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:49:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:49:11,230 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:49:11,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-20 20:49:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:49:11,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:11,693 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:49:11,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:49:11,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:11,821 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 [2022-11-20 20:49:11,847 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:49:11,847 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 [2022-11-20 20:49:11,906 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:49:11,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:49:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:12,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:49:12,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:49:12,968 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 51 treesize of output 75 [2022-11-20 20:49:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:15,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540363922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:49:15,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:49:15,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 19 [2022-11-20 20:49:15,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571887099] [2022-11-20 20:49:15,882 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:49:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:49:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:15,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:49:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2022-11-20 20:49:15,884 INFO L87 Difference]: Start difference. First operand 4686 states and 18341 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:21,297 INFO L93 Difference]: Finished difference Result 7777 states and 28420 transitions. [2022-11-20 20:49:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:49:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:21,323 INFO L225 Difference]: With dead ends: 7777 [2022-11-20 20:49:21,323 INFO L226 Difference]: Without dead ends: 7777 [2022-11-20 20:49:21,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=178, Invalid=633, Unknown=1, NotChecked=0, Total=812 [2022-11-20 20:49:21,324 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 393 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 678 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:21,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 0 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 733 Invalid, 0 Unknown, 678 Unchecked, 4.3s Time] [2022-11-20 20:49:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7777 states. [2022-11-20 20:49:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7777 to 4640. [2022-11-20 20:49:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4549 states have (on average 3.9969224005275885) internal successors, (18182), 4639 states have internal predecessors, (18182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 18182 transitions. [2022-11-20 20:49:21,441 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 18182 transitions. Word has length 12 [2022-11-20 20:49:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:21,442 INFO L495 AbstractCegarLoop]: Abstraction has 4640 states and 18182 transitions. [2022-11-20 20:49:21,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 18182 transitions. [2022-11-20 20:49:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:21,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:21,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:21,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (92)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:21,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:21,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-20 20:49:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:22,044 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 734685665, now seen corresponding path program 1 times [2022-11-20 20:49:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179224648] [2022-11-20 20:49:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:22,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:22,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:22,046 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:22,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 20:49:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:22,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:49:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:22,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:49:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:23,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:23,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179224648] [2022-11-20 20:49:23,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179224648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:49:23,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [859103184] [2022-11-20 20:49:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:23,072 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:49:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:49:23,073 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:49:23,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-20 20:49:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:49:23,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:49:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:23,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [859103184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:49:23,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302364433] [2022-11-20 20:49:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:23,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:49:23,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:49:23,978 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:49:23,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-20 20:49:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:24,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:49:24,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:24,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:49:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:24,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302364433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:49:24,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:49:24,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2022-11-20 20:49:24,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087199344] [2022-11-20 20:49:24,534 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:49:24,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:49:24,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:24,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:49:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:49:24,535 INFO L87 Difference]: Start difference. First operand 4640 states and 18182 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2022-11-20 20:49:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:32,218 INFO L93 Difference]: Finished difference Result 14255 states and 52639 transitions. [2022-11-20 20:49:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:49:32,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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 12 [2022-11-20 20:49:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:32,268 INFO L225 Difference]: With dead ends: 14255 [2022-11-20 20:49:32,268 INFO L226 Difference]: Without dead ends: 14255 [2022-11-20 20:49:32,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:49:32,268 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 682 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:32,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 0 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-20 20:49:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2022-11-20 20:49:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 5217. [2022-11-20 20:49:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5217 states, 5126 states have (on average 3.965470152165431) internal successors, (20327), 5216 states have internal predecessors, (20327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5217 states to 5217 states and 20327 transitions. [2022-11-20 20:49:32,446 INFO L78 Accepts]: Start accepts. Automaton has 5217 states and 20327 transitions. Word has length 12 [2022-11-20 20:49:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:32,446 INFO L495 AbstractCegarLoop]: Abstraction has 5217 states and 20327 transitions. [2022-11-20 20:49:32,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 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) [2022-11-20 20:49:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5217 states and 20327 transitions. [2022-11-20 20:49:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:32,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:32,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:32,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:32,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (95)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:32,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:33,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:49:33,048 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:33,049 INFO L85 PathProgramCache]: Analyzing trace with hash 734672537, now seen corresponding path program 1 times [2022-11-20 20:49:33,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:33,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592428732] [2022-11-20 20:49:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:33,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:33,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:33,050 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:33,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-20 20:49:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:33,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:49:33,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:49:33,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:33,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:33,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592428732] [2022-11-20 20:49:33,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592428732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:33,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:33,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:49:33,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972272268] [2022-11-20 20:49:33,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:33,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:49:33,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:49:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:49:33,436 INFO L87 Difference]: Start difference. First operand 5217 states and 20327 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:34,486 INFO L93 Difference]: Finished difference Result 8041 states and 30533 transitions. [2022-11-20 20:49:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:34,513 INFO L225 Difference]: With dead ends: 8041 [2022-11-20 20:49:34,513 INFO L226 Difference]: Without dead ends: 8041 [2022-11-20 20:49:34,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:49:34,514 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 168 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:34,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 0 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:49:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8041 states. [2022-11-20 20:49:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8041 to 5840. [2022-11-20 20:49:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5840 states, 5749 states have (on average 4.041224560793181) internal successors, (23233), 5839 states have internal predecessors, (23233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5840 states to 5840 states and 23233 transitions. [2022-11-20 20:49:34,655 INFO L78 Accepts]: Start accepts. Automaton has 5840 states and 23233 transitions. Word has length 12 [2022-11-20 20:49:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:34,656 INFO L495 AbstractCegarLoop]: Abstraction has 5840 states and 23233 transitions. [2022-11-20 20:49:34,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5840 states and 23233 transitions. [2022-11-20 20:49:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:34,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:34,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:34,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-20 20:49:34,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:34,857 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:34,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:34,858 INFO L85 PathProgramCache]: Analyzing trace with hash 734672521, now seen corresponding path program 1 times [2022-11-20 20:49:34,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:34,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86696444] [2022-11-20 20:49:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:34,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:34,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:34,860 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:34,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-20 20:49:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:35,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:49:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:35,384 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 20:49:35,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 20:49:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:35,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 20:49:35,519 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:49:35,519 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 [2022-11-20 20:49:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:49:35,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:35,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:35,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86696444] [2022-11-20 20:49:35,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86696444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:35,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:35,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:49:35,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340871827] [2022-11-20 20:49:35,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:35,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:49:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:35,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:49:35,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:49:35,782 INFO L87 Difference]: Start difference. First operand 5840 states and 23233 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:36,190 INFO L93 Difference]: Finished difference Result 5839 states and 23229 transitions. [2022-11-20 20:49:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:49:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:36,210 INFO L225 Difference]: With dead ends: 5839 [2022-11-20 20:49:36,210 INFO L226 Difference]: Without dead ends: 5839 [2022-11-20 20:49:36,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:49:36,210 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:36,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-11-20 20:49:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2022-11-20 20:49:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 5839. [2022-11-20 20:49:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5839 states, 5748 states have (on average 4.041231732776618) internal successors, (23229), 5838 states have internal predecessors, (23229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5839 states to 5839 states and 23229 transitions. [2022-11-20 20:49:36,327 INFO L78 Accepts]: Start accepts. Automaton has 5839 states and 23229 transitions. Word has length 12 [2022-11-20 20:49:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:36,327 INFO L495 AbstractCegarLoop]: Abstraction has 5839 states and 23229 transitions. [2022-11-20 20:49:36,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5839 states and 23229 transitions. [2022-11-20 20:49:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:36,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:36,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:36,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-20 20:49:36,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:36,529 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1363929787, now seen corresponding path program 1 times [2022-11-20 20:49:36,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:36,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092647371] [2022-11-20 20:49:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:36,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:36,531 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:36,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-20 20:49:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:49:36,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:37,023 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:49:37,023 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 [2022-11-20 20:49:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:37,092 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 [2022-11-20 20:49:37,161 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:37,162 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 [2022-11-20 20:49:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:49:37,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:37,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:37,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092647371] [2022-11-20 20:49:37,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092647371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:37,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:37,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:37,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488797162] [2022-11-20 20:49:37,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:37,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:37,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:37,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:37,266 INFO L87 Difference]: Start difference. First operand 5839 states and 23229 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:37,727 INFO L93 Difference]: Finished difference Result 5847 states and 23238 transitions. [2022-11-20 20:49:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:37,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:37,747 INFO L225 Difference]: With dead ends: 5847 [2022-11-20 20:49:37,747 INFO L226 Difference]: Without dead ends: 5847 [2022-11-20 20:49:37,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:37,748 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:37,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:49:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2022-11-20 20:49:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5844. [2022-11-20 20:49:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5844 states, 5753 states have (on average 4.038588562489136) internal successors, (23234), 5843 states have internal predecessors, (23234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5844 states to 5844 states and 23234 transitions. [2022-11-20 20:49:37,868 INFO L78 Accepts]: Start accepts. Automaton has 5844 states and 23234 transitions. Word has length 12 [2022-11-20 20:49:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:37,868 INFO L495 AbstractCegarLoop]: Abstraction has 5844 states and 23234 transitions. [2022-11-20 20:49:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5844 states and 23234 transitions. [2022-11-20 20:49:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:37,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:37,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:37,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:38,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:38,085 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:38,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1361178382, now seen corresponding path program 1 times [2022-11-20 20:49:38,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:38,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772359219] [2022-11-20 20:49:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:38,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:38,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:38,087 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:38,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-20 20:49:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:38,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:49:38,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:38,540 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:49:38,541 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 [2022-11-20 20:49:38,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:38,595 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 [2022-11-20 20:49:38,662 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:38,662 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 [2022-11-20 20:49:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:49:38,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:38,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:38,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772359219] [2022-11-20 20:49:38,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772359219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:38,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:38,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:38,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664281886] [2022-11-20 20:49:38,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:38,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:38,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:38,776 INFO L87 Difference]: Start difference. First operand 5844 states and 23234 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:39,177 INFO L93 Difference]: Finished difference Result 5837 states and 23198 transitions. [2022-11-20 20:49:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:39,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:39,206 INFO L225 Difference]: With dead ends: 5837 [2022-11-20 20:49:39,206 INFO L226 Difference]: Without dead ends: 5837 [2022-11-20 20:49:39,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:39,207 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:39,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-20 20:49:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2022-11-20 20:49:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 5833. [2022-11-20 20:49:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5833 states, 5742 states have (on average 4.038314176245211) internal successors, (23188), 5832 states have internal predecessors, (23188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5833 states to 5833 states and 23188 transitions. [2022-11-20 20:49:39,397 INFO L78 Accepts]: Start accepts. Automaton has 5833 states and 23188 transitions. Word has length 12 [2022-11-20 20:49:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:39,397 INFO L495 AbstractCegarLoop]: Abstraction has 5833 states and 23188 transitions. [2022-11-20 20:49:39,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5833 states and 23188 transitions. [2022-11-20 20:49:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:39,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:39,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:39,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:39,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:39,599 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1170592645, now seen corresponding path program 1 times [2022-11-20 20:49:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:39,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843844346] [2022-11-20 20:49:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:39,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:39,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:39,601 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:39,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-20 20:49:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:49:40,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:40,099 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:49:40,099 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 [2022-11-20 20:49:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:40,154 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 [2022-11-20 20:49:40,222 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:40,223 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 [2022-11-20 20:49:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:49:40,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:40,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843844346] [2022-11-20 20:49:40,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843844346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:40,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:40,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:40,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372180915] [2022-11-20 20:49:40,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:40,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:40,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:40,330 INFO L87 Difference]: Start difference. First operand 5833 states and 23188 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:40,806 INFO L93 Difference]: Finished difference Result 5836 states and 23193 transitions. [2022-11-20 20:49:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:40,825 INFO L225 Difference]: With dead ends: 5836 [2022-11-20 20:49:40,826 INFO L226 Difference]: Without dead ends: 5836 [2022-11-20 20:49:40,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:40,826 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:40,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:49:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2022-11-20 20:49:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 5827. [2022-11-20 20:49:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 5736 states have (on average 4.040097629009763) internal successors, (23174), 5826 states have internal predecessors, (23174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 23174 transitions. [2022-11-20 20:49:40,945 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 23174 transitions. Word has length 12 [2022-11-20 20:49:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:40,945 INFO L495 AbstractCegarLoop]: Abstraction has 5827 states and 23174 transitions. [2022-11-20 20:49:40,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 23174 transitions. [2022-11-20 20:49:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:40,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:40,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:40,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:41,147 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1123024146, now seen corresponding path program 1 times [2022-11-20 20:49:41,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304820633] [2022-11-20 20:49:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:41,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:41,149 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:41,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-20 20:49:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:49:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:41,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:41,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:41,597 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:49:41,597 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:49:41,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:41,776 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:49:41,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:49:42,515 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 20:49:42,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 20:49:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:49:43,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:43,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304820633] [2022-11-20 20:49:43,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304820633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:43,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:43,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:43,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429245747] [2022-11-20 20:49:43,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:43,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:43,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:43,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:43,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:43,078 INFO L87 Difference]: Start difference. First operand 5827 states and 23174 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:43,425 INFO L93 Difference]: Finished difference Result 5853 states and 23228 transitions. [2022-11-20 20:49:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:49:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:43,444 INFO L225 Difference]: With dead ends: 5853 [2022-11-20 20:49:43,444 INFO L226 Difference]: Without dead ends: 5853 [2022-11-20 20:49:43,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:43,445 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:43,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-11-20 20:49:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2022-11-20 20:49:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 5840. [2022-11-20 20:49:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5840 states, 5749 states have (on average 4.035658375369629) internal successors, (23201), 5839 states have internal predecessors, (23201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5840 states to 5840 states and 23201 transitions. [2022-11-20 20:49:43,560 INFO L78 Accepts]: Start accepts. Automaton has 5840 states and 23201 transitions. Word has length 12 [2022-11-20 20:49:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:43,560 INFO L495 AbstractCegarLoop]: Abstraction has 5840 states and 23201 transitions. [2022-11-20 20:49:43,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5840 states and 23201 transitions. [2022-11-20 20:49:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:43,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:43,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:43,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:43,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:43,761 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1037719803, now seen corresponding path program 1 times [2022-11-20 20:49:43,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:43,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529988244] [2022-11-20 20:49:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:43,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:43,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:43,763 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:43,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-20 20:49:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:49:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:44,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:44,205 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:49:44,205 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:49:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:44,415 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:49:44,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:49:45,143 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:45,143 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 [2022-11-20 20:49:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:49:45,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:45,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529988244] [2022-11-20 20:49:45,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529988244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:45,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:45,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:45,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043748847] [2022-11-20 20:49:45,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:45,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:45,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:45,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:45,451 INFO L87 Difference]: Start difference. First operand 5840 states and 23201 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:45,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:45,789 INFO L93 Difference]: Finished difference Result 5853 states and 23230 transitions. [2022-11-20 20:49:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:49:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:45,817 INFO L225 Difference]: With dead ends: 5853 [2022-11-20 20:49:45,817 INFO L226 Difference]: Without dead ends: 5853 [2022-11-20 20:49:45,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:45,818 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:45,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-11-20 20:49:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2022-11-20 20:49:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 5842. [2022-11-20 20:49:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5842 states, 5751 states have (on average 4.034950443401148) internal successors, (23205), 5841 states have internal predecessors, (23205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5842 states to 5842 states and 23205 transitions. [2022-11-20 20:49:45,953 INFO L78 Accepts]: Start accepts. Automaton has 5842 states and 23205 transitions. Word has length 12 [2022-11-20 20:49:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:45,953 INFO L495 AbstractCegarLoop]: Abstraction has 5842 states and 23205 transitions. [2022-11-20 20:49:45,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5842 states and 23205 transitions. [2022-11-20 20:49:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:45,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:45,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:45,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:46,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:46,155 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:46,156 INFO L85 PathProgramCache]: Analyzing trace with hash 581086957, now seen corresponding path program 1 times [2022-11-20 20:49:46,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:46,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147454822] [2022-11-20 20:49:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:46,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:46,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:46,157 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:46,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-20 20:49:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:46,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:49:46,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:49:46,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:46,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:46,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147454822] [2022-11-20 20:49:46,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147454822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:46,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:46,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:49:46,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812811536] [2022-11-20 20:49:46,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:46,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:49:46,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:46,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:49:46,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:46,645 INFO L87 Difference]: Start difference. First operand 5842 states and 23205 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:47,755 INFO L93 Difference]: Finished difference Result 5960 states and 23054 transitions. [2022-11-20 20:49:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:47,776 INFO L225 Difference]: With dead ends: 5960 [2022-11-20 20:49:47,776 INFO L226 Difference]: Without dead ends: 5960 [2022-11-20 20:49:47,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:49:47,777 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:47,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:49:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2022-11-20 20:49:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 5736. [2022-11-20 20:49:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5736 states, 5645 states have (on average 3.994331266607617) internal successors, (22548), 5735 states have internal predecessors, (22548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 22548 transitions. [2022-11-20 20:49:47,900 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 22548 transitions. Word has length 12 [2022-11-20 20:49:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:47,900 INFO L495 AbstractCegarLoop]: Abstraction has 5736 states and 22548 transitions. [2022-11-20 20:49:47,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 22548 transitions. [2022-11-20 20:49:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:47,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:47,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:47,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:48,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:48,102 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:48,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:48,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1939105129, now seen corresponding path program 1 times [2022-11-20 20:49:48,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:48,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332761446] [2022-11-20 20:49:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:48,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:48,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:48,104 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:48,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-20 20:49:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:48,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:49:48,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:48,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:48,618 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-20 20:49:48,618 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 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:49:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:48,813 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 20:49:48,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 20:49:49,550 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 20:49:49,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 20:49:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:49:50,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:50,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:50,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332761446] [2022-11-20 20:49:50,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332761446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:50,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:50,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:50,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79838315] [2022-11-20 20:49:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:50,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:50,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:50,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:50,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:50,275 INFO L87 Difference]: Start difference. First operand 5736 states and 22548 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:50,611 INFO L93 Difference]: Finished difference Result 5753 states and 22581 transitions. [2022-11-20 20:49:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:49:50,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:50,630 INFO L225 Difference]: With dead ends: 5753 [2022-11-20 20:49:50,630 INFO L226 Difference]: Without dead ends: 5753 [2022-11-20 20:49:50,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:50,631 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:50,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-11-20 20:49:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2022-11-20 20:49:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 5736. [2022-11-20 20:49:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5736 states, 5645 states have (on average 3.994331266607617) internal successors, (22548), 5735 states have internal predecessors, (22548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 22548 transitions. [2022-11-20 20:49:50,750 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 22548 transitions. Word has length 12 [2022-11-20 20:49:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:50,751 INFO L495 AbstractCegarLoop]: Abstraction has 5736 states and 22548 transitions. [2022-11-20 20:49:50,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 22548 transitions. [2022-11-20 20:49:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:50,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:50,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:50,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-20 20:49:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:50,952 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2024409472, now seen corresponding path program 1 times [2022-11-20 20:49:50,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:50,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329270069] [2022-11-20 20:49:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:50,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:50,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:50,954 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:50,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-20 20:49:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:49:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:51,463 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:49:51,463 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 20:49:51,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:51,529 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 [2022-11-20 20:49:51,599 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:51,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 20:49:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:49:51,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:51,714 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:51,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329270069] [2022-11-20 20:49:51,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329270069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:51,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:51,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:51,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380310971] [2022-11-20 20:49:51,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:51,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:51,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:51,716 INFO L87 Difference]: Start difference. First operand 5736 states and 22548 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:52,179 INFO L93 Difference]: Finished difference Result 5748 states and 22575 transitions. [2022-11-20 20:49:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:52,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:52,198 INFO L225 Difference]: With dead ends: 5748 [2022-11-20 20:49:52,198 INFO L226 Difference]: Without dead ends: 5748 [2022-11-20 20:49:52,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:52,199 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:52,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:49:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5748 states. [2022-11-20 20:49:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5748 to 5726. [2022-11-20 20:49:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5635 states have (on average 3.997338065661047) internal successors, (22525), 5725 states have internal predecessors, (22525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 22525 transitions. [2022-11-20 20:49:52,318 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 22525 transitions. Word has length 12 [2022-11-20 20:49:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:52,319 INFO L495 AbstractCegarLoop]: Abstraction has 5726 states and 22525 transitions. [2022-11-20 20:49:52,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 22525 transitions. [2022-11-20 20:49:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:49:52,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:52,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:52,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:52,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:52,521 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:52,521 INFO L85 PathProgramCache]: Analyzing trace with hash 817256196, now seen corresponding path program 1 times [2022-11-20 20:49:52,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:52,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237064063] [2022-11-20 20:49:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:52,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:52,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:52,523 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:52,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-20 20:49:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:52,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:49:52,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:52,976 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:49:52,977 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 [2022-11-20 20:49:53,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:53,038 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 [2022-11-20 20:49:53,089 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:49:53,090 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 [2022-11-20 20:49:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:49:53,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:53,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237064063] [2022-11-20 20:49:53,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237064063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:53,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:53,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:49:53,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435364725] [2022-11-20 20:49:53,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:53,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:53,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:53,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:53,233 INFO L87 Difference]: Start difference. First operand 5726 states and 22525 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:53,758 INFO L93 Difference]: Finished difference Result 5742 states and 22557 transitions. [2022-11-20 20:49:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:49:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:49:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:53,777 INFO L225 Difference]: With dead ends: 5742 [2022-11-20 20:49:53,777 INFO L226 Difference]: Without dead ends: 5742 [2022-11-20 20:49:53,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:49:53,777 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:53,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-11-20 20:49:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2022-11-20 20:49:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5742. [2022-11-20 20:49:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5742 states, 5651 states have (on average 3.9916828879844277) internal successors, (22557), 5741 states have internal predecessors, (22557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5742 states to 5742 states and 22557 transitions. [2022-11-20 20:49:53,898 INFO L78 Accepts]: Start accepts. Automaton has 5742 states and 22557 transitions. Word has length 12 [2022-11-20 20:49:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:53,898 INFO L495 AbstractCegarLoop]: Abstraction has 5742 states and 22557 transitions. [2022-11-20 20:49:53,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5742 states and 22557 transitions. [2022-11-20 20:49:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:49:53,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:53,899 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:53,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:54,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:54,100 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1003395393, now seen corresponding path program 2 times [2022-11-20 20:49:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:54,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273492321] [2022-11-20 20:49:54,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:49:54,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:54,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:54,102 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:54,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-20 20:49:54,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:49:54,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:49:54,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:49:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:54,596 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:49:54,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:49:54,787 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:49:54,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:49:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:54,915 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 [2022-11-20 20:49:54,928 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:49:54,929 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 [2022-11-20 20:49:55,000 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:49:55,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:49:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:49:55,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:49:55,319 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:49:55,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273492321] [2022-11-20 20:49:55,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273492321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:55,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:55,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:49:55,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514825631] [2022-11-20 20:49:55,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:55,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:49:55,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:49:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:49:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:49:55,320 INFO L87 Difference]: Start difference. First operand 5742 states and 22557 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) [2022-11-20 20:49:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:55,907 INFO L93 Difference]: Finished difference Result 5742 states and 22550 transitions. [2022-11-20 20:49:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:49:55,909 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 13 [2022-11-20 20:49:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:55,928 INFO L225 Difference]: With dead ends: 5742 [2022-11-20 20:49:55,928 INFO L226 Difference]: Without dead ends: 5742 [2022-11-20 20:49:55,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:49:55,928 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:55,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 90 Unchecked, 0.5s Time] [2022-11-20 20:49:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2022-11-20 20:49:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5740. [2022-11-20 20:49:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 5649 states have (on average 3.9907948309435297) internal successors, (22544), 5739 states have internal predecessors, (22544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:49:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 22544 transitions. [2022-11-20 20:49:56,048 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 22544 transitions. Word has length 13 [2022-11-20 20:49:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:56,048 INFO L495 AbstractCegarLoop]: Abstraction has 5740 states and 22544 transitions. [2022-11-20 20:49:56,049 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) [2022-11-20 20:49:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 22544 transitions. [2022-11-20 20:49:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:49:56,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:56,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:49:56,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-20 20:49:56,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:56,251 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:49:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash -841869350, now seen corresponding path program 2 times [2022-11-20 20:49:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:49:56,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985567450] [2022-11-20 20:49:56,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:49:56,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:49:56,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:49:56,254 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:49:56,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-20 20:49:56,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:49:56,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:49:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:49:56,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:49:56,856 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 20:49:56,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 20:49:57,036 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:49:57,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:49:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:49:57,151 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 12 treesize of output 14 [2022-11-20 20:49:57,169 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:49:57,169 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 [2022-11-20 20:49:57,251 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:49:57,251 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 [2022-11-20 20:49:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:49:57,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:00,856 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) c_~a1~0.offset)) (.cse0 (bvadd (_ bv4 32) c_~a1~0.offset))) (and (or (bvule .cse0 .cse1) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_260| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~size#1_241| (_ BitVec 32))) (or (not (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_260| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_241|)) c_~a1~0.base))) (not (bvule |v_ULTIMATE.start_create_fresh_int_array_~size#1_241| (_ bv1073741823 32))) (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_241|)))) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~size#1_241| (_ BitVec 32))) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_260| (_ BitVec 32))) (let ((.cse2 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_260| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_241|)) c_~a1~0.base))) (or (bvule .cse1 .cse2) (not (bvule .cse0 .cse2))))) (not (bvule |v_ULTIMATE.start_create_fresh_int_array_~size#1_241| (_ bv1073741823 32))) (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_241|))))) is different from false [2022-11-20 20:50:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:06,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985567450] [2022-11-20 20:50:06,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985567450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2067081199] [2022-11-20 20:50:06,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:50:06,233 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:50:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:50:06,235 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:50:06,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-20 20:50:07,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:50:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:50:07,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:50:07,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:07,312 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:50:07,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:50:07,510 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:50:07,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:50:08,027 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:50:08,028 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 [2022-11-20 20:50:08,039 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 [2022-11-20 20:50:08,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:50:08,235 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 [2022-11-20 20:50:08,248 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:50:08,249 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 [2022-11-20 20:50:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:08,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:13,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2067081199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:13,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138867157] [2022-11-20 20:50:13,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:50:13,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:50:13,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:50:13,285 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:50:13,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-20 20:50:13,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:50:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:50:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:50:13,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:13,988 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:50:13,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:50:14,189 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:50:14,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:50:14,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:50:14,466 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 [2022-11-20 20:50:14,496 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 20:50:14,497 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 [2022-11-20 20:50:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:50:14,691 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 [2022-11-20 20:50:14,705 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:50:14,705 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 [2022-11-20 20:50:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:14,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:28,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138867157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:28,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:50:28,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7, 7, 7, 8] total 35 [2022-11-20 20:50:28,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522132258] [2022-11-20 20:50:28,561 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:50:28,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 20:50:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 20:50:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1086, Unknown=6, NotChecked=68, Total=1332 [2022-11-20 20:50:28,562 INFO L87 Difference]: Start difference. First operand 5740 states and 22544 transitions. Second operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:44,118 INFO L93 Difference]: Finished difference Result 9715 states and 37925 transitions. [2022-11-20 20:50:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 20:50:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:50:44,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:44,153 INFO L225 Difference]: With dead ends: 9715 [2022-11-20 20:50:44,153 INFO L226 Difference]: Without dead ends: 9715 [2022-11-20 20:50:44,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=375, Invalid=2379, Unknown=6, NotChecked=102, Total=2862 [2022-11-20 20:50:44,154 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 457 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1878 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:44,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 0 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 591 Invalid, 0 Unknown, 1878 Unchecked, 4.9s Time] [2022-11-20 20:50:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9715 states. [2022-11-20 20:50:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9715 to 6499. [2022-11-20 20:50:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 6408 states have (on average 4.120630461922596) internal successors, (26405), 6498 states have internal predecessors, (26405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 26405 transitions. [2022-11-20 20:50:44,354 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 26405 transitions. Word has length 13 [2022-11-20 20:50:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:44,355 INFO L495 AbstractCegarLoop]: Abstraction has 6499 states and 26405 transitions. [2022-11-20 20:50:44,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:50:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 26405 transitions. [2022-11-20 20:50:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:50:44,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:44,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:44,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-20 20:50:44,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-20 20:50:44,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-20 20:50:44,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:44,961 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:50:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash -841869269, now seen corresponding path program 1 times [2022-11-20 20:50:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:44,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828740597] [2022-11-20 20:50:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:44,963 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:44,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-20 20:50:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:50:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:45,486 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 20:50:45,494 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 8 treesize of output 7 [2022-11-20 20:50:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:50:45,659 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 [2022-11-20 20:50:45,671 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:50:45,671 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 [2022-11-20 20:50:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:45,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:49,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:49,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828740597] [2022-11-20 20:50:49,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828740597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:49,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1185430642] [2022-11-20 20:50:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:49,210 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:50:49,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:50:49,211 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:50:49,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-20 20:50:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:50,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:50:50,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:50,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 20:50:50,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:50:50,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:50:50,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 20:50:50,383 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:50:50,383 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 [2022-11-20 20:50:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:50,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:53,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1185430642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:53,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550616130] [2022-11-20 20:50:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:53,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:50:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:50:53,591 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:50:53,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-20 20:50:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:53,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:50:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:53,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:50:54,434 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:50:54,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:50:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:50:55,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:51:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:51:13,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550616130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:51:13,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:51:13,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 31 [2022-11-20 20:51:13,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605733710] [2022-11-20 20:51:13,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:51:13,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 20:51:13,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:13,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 20:51:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=850, Unknown=2, NotChecked=0, Total=992 [2022-11-20 20:51:13,317 INFO L87 Difference]: Start difference. First operand 6499 states and 26405 transitions. Second operand has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:51:53,487 WARN L233 SmtUtils]: Spent 39.21s on a formula simplification. DAG size of input: 63 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:52:10,806 WARN L233 SmtUtils]: Spent 16.80s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:52:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:52:19,825 INFO L93 Difference]: Finished difference Result 12831 states and 51175 transitions. [2022-11-20 20:52:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:52:19,827 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:52:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:52:19,871 INFO L225 Difference]: With dead ends: 12831 [2022-11-20 20:52:19,871 INFO L226 Difference]: Without dead ends: 12831 [2022-11-20 20:52:19,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 84.0s TimeCoverageRelationStatistics Valid=248, Invalid=1556, Unknown=2, NotChecked=0, Total=1806 [2022-11-20 20:52:19,872 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 520 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 981 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:52:19,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 0 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 631 Invalid, 0 Unknown, 981 Unchecked, 6.9s Time] [2022-11-20 20:52:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2022-11-20 20:52:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 8076. [2022-11-20 20:52:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 7990 states have (on average 4.253566958698373) internal successors, (33986), 8075 states have internal predecessors, (33986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 33986 transitions. [2022-11-20 20:52:20,100 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 33986 transitions. Word has length 13 [2022-11-20 20:52:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:52:20,100 INFO L495 AbstractCegarLoop]: Abstraction has 8076 states and 33986 transitions. [2022-11-20 20:52:20,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 33986 transitions. [2022-11-20 20:52:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:52:20,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:52:20,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:52:20,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-20 20:52:20,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-11-20 20:52:20,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-11-20 20:52:20,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:52:20,702 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:52:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:52:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash 594041214, now seen corresponding path program 1 times [2022-11-20 20:52:20,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:52:20,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717091937] [2022-11-20 20:52:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:52:20,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:52:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:52:20,704 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:52:20,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-20 20:52:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:52:21,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:21,386 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:52:21,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:52:21,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:21,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 20:52:21,565 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:52:21,566 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 [2022-11-20 20:52:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:52:21,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:52:21,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:52:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717091937] [2022-11-20 20:52:21,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717091937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:52:21,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:52:21,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:52:21,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401159800] [2022-11-20 20:52:21,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:52:21,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:52:21,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:52:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:52:21,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:52:21,832 INFO L87 Difference]: Start difference. First operand 8076 states and 33986 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:52:22,329 INFO L93 Difference]: Finished difference Result 8102 states and 34077 transitions. [2022-11-20 20:52:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:52:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:52:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:52:22,361 INFO L225 Difference]: With dead ends: 8102 [2022-11-20 20:52:22,361 INFO L226 Difference]: Without dead ends: 8102 [2022-11-20 20:52:22,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:52:22,361 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:52:22,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 20:52:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8102 states. [2022-11-20 20:52:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8102 to 8096. [2022-11-20 20:52:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8096 states, 8010 states have (on average 4.251685393258427) internal successors, (34056), 8095 states have internal predecessors, (34056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8096 states to 8096 states and 34056 transitions. [2022-11-20 20:52:22,569 INFO L78 Accepts]: Start accepts. Automaton has 8096 states and 34056 transitions. Word has length 13 [2022-11-20 20:52:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:52:22,569 INFO L495 AbstractCegarLoop]: Abstraction has 8096 states and 34056 transitions. [2022-11-20 20:52:22,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 8096 states and 34056 transitions. [2022-11-20 20:52:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:52:22,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:52:22,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:52:22,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-20 20:52:22,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:52:22,772 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:52:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:52:22,772 INFO L85 PathProgramCache]: Analyzing trace with hash 596837724, now seen corresponding path program 2 times [2022-11-20 20:52:22,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:52:22,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275026983] [2022-11-20 20:52:22,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:52:22,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:52:22,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:52:22,774 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:52:22,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-20 20:52:23,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:52:23,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:52:23,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:52:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:23,309 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 20:52:23,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 20:52:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:23,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 20:52:23,480 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:52:23,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 20:52:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:52:23,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:52:23,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:52:23,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275026983] [2022-11-20 20:52:23,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275026983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:52:23,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:52:23,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:52:23,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487586734] [2022-11-20 20:52:23,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:52:23,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:52:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:52:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:52:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:52:23,735 INFO L87 Difference]: Start difference. First operand 8096 states and 34056 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:52:24,212 INFO L93 Difference]: Finished difference Result 8112 states and 34117 transitions. [2022-11-20 20:52:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:52:24,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:52:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:52:24,245 INFO L225 Difference]: With dead ends: 8112 [2022-11-20 20:52:24,245 INFO L226 Difference]: Without dead ends: 8112 [2022-11-20 20:52:24,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:52:24,246 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:52:24,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2022-11-20 20:52:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8112 states. [2022-11-20 20:52:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8112 to 8086. [2022-11-20 20:52:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8086 states, 8000 states have (on average 4.25325) internal successors, (34026), 8085 states have internal predecessors, (34026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8086 states to 8086 states and 34026 transitions. [2022-11-20 20:52:24,450 INFO L78 Accepts]: Start accepts. Automaton has 8086 states and 34026 transitions. Word has length 13 [2022-11-20 20:52:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:52:24,450 INFO L495 AbstractCegarLoop]: Abstraction has 8086 states and 34026 transitions. [2022-11-20 20:52:24,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8086 states and 34026 transitions. [2022-11-20 20:52:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:52:24,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:52:24,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:52:24,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-20 20:52:24,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:52:24,652 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:52:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:52:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash 596617314, now seen corresponding path program 3 times [2022-11-20 20:52:24,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:52:24,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308688503] [2022-11-20 20:52:24,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:52:24,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:52:24,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:52:24,654 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:52:24,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-20 20:52:25,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:52:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:52:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:52:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:25,198 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 20:52:25,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 20:52:25,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:25,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 20:52:25,366 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:52:25,366 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 [2022-11-20 20:52:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:52:25,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:52:25,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:52:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308688503] [2022-11-20 20:52:25,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308688503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:52:25,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:52:25,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:52:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871901956] [2022-11-20 20:52:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:52:25,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:52:25,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:52:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:52:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:52:25,681 INFO L87 Difference]: Start difference. First operand 8086 states and 34026 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:52:26,135 INFO L93 Difference]: Finished difference Result 8092 states and 34037 transitions. [2022-11-20 20:52:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:52:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:52:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:52:26,162 INFO L225 Difference]: With dead ends: 8092 [2022-11-20 20:52:26,163 INFO L226 Difference]: Without dead ends: 8092 [2022-11-20 20:52:26,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:52:26,163 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:52:26,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:52:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2022-11-20 20:52:26,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 8066. [2022-11-20 20:52:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8066 states, 7980 states have (on average 4.253884711779449) internal successors, (33946), 8065 states have internal predecessors, (33946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8066 states to 8066 states and 33946 transitions. [2022-11-20 20:52:26,329 INFO L78 Accepts]: Start accepts. Automaton has 8066 states and 33946 transitions. Word has length 13 [2022-11-20 20:52:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:52:26,329 INFO L495 AbstractCegarLoop]: Abstraction has 8066 states and 33946 transitions. [2022-11-20 20:52:26,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 8066 states and 33946 transitions. [2022-11-20 20:52:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:52:26,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:52:26,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:52:26,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-20 20:52:26,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:52:26,531 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:52:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:52:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash 787188264, now seen corresponding path program 1 times [2022-11-20 20:52:26,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:52:26,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579062991] [2022-11-20 20:52:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:52:26,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:52:26,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:52:26,533 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:52:26,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-20 20:52:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 20:52:26,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:27,147 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:52:27,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:52:27,315 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:52:27,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:52:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:27,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 20:52:27,458 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:52:27,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 20:52:27,679 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-20 20:52:27,679 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 23 treesize of output 36 [2022-11-20 20:52:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:52:28,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:52:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:52:31,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:52:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579062991] [2022-11-20 20:52:31,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579062991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:52:31,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436692948] [2022-11-20 20:52:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:52:31,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:52:31,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:52:31,152 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:52:31,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-20 20:52:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:31,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:52:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:32,196 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:52:32,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:52:32,402 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:52:32,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:52:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:32,711 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 [2022-11-20 20:52:32,736 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:52:32,736 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 [2022-11-20 20:52:32,899 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:52:32,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:52:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:33,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:52:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:35,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436692948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:52:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522380680] [2022-11-20 20:52:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:52:35,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:52:35,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:52:35,965 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:52:35,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-20 20:52:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:52:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:36,544 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:52:36,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:52:36,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:36,701 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 [2022-11-20 20:52:36,731 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:52:36,731 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 [2022-11-20 20:52:36,896 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:52:36,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:52:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:37,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:52:39,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:52:39,443 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 51 treesize of output 75 [2022-11-20 20:52:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:44,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522380680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:52:44,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:52:44,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6, 7, 6, 7] total 29 [2022-11-20 20:52:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351448105] [2022-11-20 20:52:44,155 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:52:44,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 20:52:44,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:52:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 20:52:44,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=757, Unknown=2, NotChecked=0, Total=930 [2022-11-20 20:52:44,156 INFO L87 Difference]: Start difference. First operand 8066 states and 33946 transitions. Second operand has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:52:49,755 INFO L93 Difference]: Finished difference Result 11076 states and 43230 transitions. [2022-11-20 20:52:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 20:52:49,758 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:52:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:52:49,798 INFO L225 Difference]: With dead ends: 11076 [2022-11-20 20:52:49,798 INFO L226 Difference]: Without dead ends: 11076 [2022-11-20 20:52:49,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=410, Invalid=1480, Unknown=2, NotChecked=0, Total=1892 [2022-11-20 20:52:49,799 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 186 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 753 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:52:49,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 0 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 600 Invalid, 0 Unknown, 753 Unchecked, 3.6s Time] [2022-11-20 20:52:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2022-11-20 20:52:49,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 8068. [2022-11-20 20:52:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 7982 states have (on average 4.2535705337008265) internal successors, (33952), 8067 states have internal predecessors, (33952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 33952 transitions. [2022-11-20 20:52:50,013 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 33952 transitions. Word has length 13 [2022-11-20 20:52:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:52:50,013 INFO L495 AbstractCegarLoop]: Abstraction has 8068 states and 33952 transitions. [2022-11-20 20:52:50,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:52:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 33952 transitions. [2022-11-20 20:52:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:52:50,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:52:50,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:52:50,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (119)] Forceful destruction successful, exit code 0 [2022-11-20 20:52:50,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Ended with exit code 0 [2022-11-20 20:52:50,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-20 20:52:50,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:52:50,616 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:52:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:52:50,616 INFO L85 PathProgramCache]: Analyzing trace with hash 787194867, now seen corresponding path program 1 times [2022-11-20 20:52:50,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:52:50,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251660365] [2022-11-20 20:52:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:52:50,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:52:50,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:52:50,618 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:52:50,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-20 20:52:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:52:51,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:51,312 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:52:51,312 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 17 treesize of output 44 [2022-11-20 20:52:51,515 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:52:51,515 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 20:52:51,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:51,670 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 [2022-11-20 20:52:51,698 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:52:51,699 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 [2022-11-20 20:52:51,798 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:52:51,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:52:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:52,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:52:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:54,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:52:54,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251660365] [2022-11-20 20:52:54,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251660365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:52:54,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [773872014] [2022-11-20 20:52:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:52:54,014 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:52:54,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:52:54,016 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:52:54,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-11-20 20:52:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:54,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:52:54,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:55,067 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:52:55,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:52:55,273 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:52:55,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:52:55,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:55,546 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 [2022-11-20 20:52:55,573 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:52:55,573 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 [2022-11-20 20:52:55,655 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:52:55,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:52:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:56,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:52:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:57,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [773872014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:52:57,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609447681] [2022-11-20 20:52:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:52:57,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:52:57,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:52:57,118 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:52:57,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-20 20:52:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:52:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:57,711 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:52:57,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:52:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:52:57,856 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 [2022-11-20 20:52:57,871 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:52:57,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 20:52:57,974 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:52:57,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:52:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:52:58,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:52:59,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:52:59,994 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 51 treesize of output 75 [2022-11-20 20:53:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:53:03,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609447681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:03,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:53:03,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 19 [2022-11-20 20:53:03,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525535066] [2022-11-20 20:53:03,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:53:03,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:53:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:53:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:53:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2022-11-20 20:53:03,188 INFO L87 Difference]: Start difference. First operand 8068 states and 33952 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:05,158 INFO L93 Difference]: Finished difference Result 9956 states and 39919 transitions. [2022-11-20 20:53:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:53:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:53:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:05,195 INFO L225 Difference]: With dead ends: 9956 [2022-11-20 20:53:05,195 INFO L226 Difference]: Without dead ends: 9956 [2022-11-20 20:53:05,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=113, Invalid=438, Unknown=1, NotChecked=0, Total=552 [2022-11-20 20:53:05,196 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 148 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 560 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:05,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 0 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 239 Invalid, 0 Unknown, 560 Unchecked, 1.5s Time] [2022-11-20 20:53:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9956 states. [2022-11-20 20:53:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9956 to 8070. [2022-11-20 20:53:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8070 states, 7984 states have (on average 4.253381763527054) internal successors, (33959), 8069 states have internal predecessors, (33959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8070 states to 8070 states and 33959 transitions. [2022-11-20 20:53:05,403 INFO L78 Accepts]: Start accepts. Automaton has 8070 states and 33959 transitions. Word has length 13 [2022-11-20 20:53:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:05,403 INFO L495 AbstractCegarLoop]: Abstraction has 8070 states and 33959 transitions. [2022-11-20 20:53:05,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 8070 states and 33959 transitions. [2022-11-20 20:53:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:53:05,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:05,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:05,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:05,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-11-20 20:53:05,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (122)] Ended with exit code 0 [2022-11-20 20:53:06,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:53:06,006 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:53:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:06,007 INFO L85 PathProgramCache]: Analyzing trace with hash 787186466, now seen corresponding path program 1 times [2022-11-20 20:53:06,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:53:06,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209036740] [2022-11-20 20:53:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:06,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:06,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:53:06,008 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:53:06,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-20 20:53:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:53:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:06,727 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:53:06,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:53:06,809 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 18 treesize of output 24 [2022-11-20 20:53:06,910 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:53:06,910 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 [2022-11-20 20:53:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:53:07,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:53:07,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:53:07,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209036740] [2022-11-20 20:53:07,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209036740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:53:07,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:53:07,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:53:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443283943] [2022-11-20 20:53:07,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:53:07,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:53:07,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:53:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:53:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:53:07,169 INFO L87 Difference]: Start difference. First operand 8070 states and 33959 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:07,643 INFO L93 Difference]: Finished difference Result 8066 states and 33943 transitions. [2022-11-20 20:53:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:53:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:53:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:07,674 INFO L225 Difference]: With dead ends: 8066 [2022-11-20 20:53:07,675 INFO L226 Difference]: Without dead ends: 8066 [2022-11-20 20:53:07,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:53:07,675 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:07,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 20:53:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8066 states. [2022-11-20 20:53:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8066 to 8066. [2022-11-20 20:53:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8066 states, 7980 states have (on average 4.253508771929824) internal successors, (33943), 8065 states have internal predecessors, (33943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8066 states to 8066 states and 33943 transitions. [2022-11-20 20:53:07,864 INFO L78 Accepts]: Start accepts. Automaton has 8066 states and 33943 transitions. Word has length 13 [2022-11-20 20:53:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:07,864 INFO L495 AbstractCegarLoop]: Abstraction has 8066 states and 33943 transitions. [2022-11-20 20:53:07,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 8066 states and 33943 transitions. [2022-11-20 20:53:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:53:07,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:07,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:07,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:08,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:08,067 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:53:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:08,067 INFO L85 PathProgramCache]: Analyzing trace with hash 833297717, now seen corresponding path program 1 times [2022-11-20 20:53:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:53:08,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779426737] [2022-11-20 20:53:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:08,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:08,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:53:08,069 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:53:08,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-20 20:53:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:08,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:53:08,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:08,711 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 20:53:08,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 20:53:08,771 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:53:08,771 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 [2022-11-20 20:53:08,845 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:53:08,845 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 21 treesize of output 31 [2022-11-20 20:53:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:53:09,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:53:09,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:53:09,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779426737] [2022-11-20 20:53:09,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779426737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:53:09,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:53:09,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:53:09,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339668010] [2022-11-20 20:53:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:53:09,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:53:09,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:53:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:53:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:53:09,154 INFO L87 Difference]: Start difference. First operand 8066 states and 33943 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:09,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:09,646 INFO L93 Difference]: Finished difference Result 7710 states and 32528 transitions. [2022-11-20 20:53:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:53:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:53:09,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:09,674 INFO L225 Difference]: With dead ends: 7710 [2022-11-20 20:53:09,674 INFO L226 Difference]: Without dead ends: 7710 [2022-11-20 20:53:09,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:53:09,675 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:09,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 3 Unchecked, 0.4s Time] [2022-11-20 20:53:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7710 states. [2022-11-20 20:53:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7710 to 7661. [2022-11-20 20:53:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7661 states, 7598 states have (on average 4.268886549091866) internal successors, (32435), 7660 states have internal predecessors, (32435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7661 states to 7661 states and 32435 transitions. [2022-11-20 20:53:09,851 INFO L78 Accepts]: Start accepts. Automaton has 7661 states and 32435 transitions. Word has length 13 [2022-11-20 20:53:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:09,851 INFO L495 AbstractCegarLoop]: Abstraction has 7661 states and 32435 transitions. [2022-11-20 20:53:09,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 7661 states and 32435 transitions. [2022-11-20 20:53:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:53:09,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:09,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:09,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:10,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:10,053 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:53:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1300014419, now seen corresponding path program 1 times [2022-11-20 20:53:10,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:53:10,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932366474] [2022-11-20 20:53:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:10,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:10,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:53:10,055 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:53:10,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-20 20:53:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:10,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:53:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:10,484 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 8 treesize of output 7 [2022-11-20 20:53:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:53:10,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:53:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:53:11,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:53:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932366474] [2022-11-20 20:53:11,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932366474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [88921710] [2022-11-20 20:53:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:11,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:53:11,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:53:11,651 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:53:11,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2022-11-20 20:53:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:53:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:53:12,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:53:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:53:13,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [88921710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:13,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585031739] [2022-11-20 20:53:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:13,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:53:13,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:53:13,362 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:53:13,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-20 20:53:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:13,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:53:13,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:13,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:53:14,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:53:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:53:14,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585031739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:14,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:53:14,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 5, 5] total 22 [2022-11-20 20:53:14,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839504635] [2022-11-20 20:53:14,390 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:53:14,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 20:53:14,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:53:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 20:53:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-20 20:53:14,391 INFO L87 Difference]: Start difference. First operand 7661 states and 32435 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:26,579 INFO L93 Difference]: Finished difference Result 18619 states and 76447 transitions. [2022-11-20 20:53:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 20:53:26,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:53:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:26,769 INFO L225 Difference]: With dead ends: 18619 [2022-11-20 20:53:26,769 INFO L226 Difference]: Without dead ends: 18619 [2022-11-20 20:53:26,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=400, Invalid=1322, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 20:53:26,770 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1175 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:26,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1175 Valid, 0 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-20 20:53:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18619 states. [2022-11-20 20:53:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18619 to 10149. [2022-11-20 20:53:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10149 states, 10086 states have (on average 4.5249851279000595) internal successors, (45639), 10148 states have internal predecessors, (45639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10149 states to 10149 states and 45639 transitions. [2022-11-20 20:53:27,102 INFO L78 Accepts]: Start accepts. Automaton has 10149 states and 45639 transitions. Word has length 13 [2022-11-20 20:53:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:27,103 INFO L495 AbstractCegarLoop]: Abstraction has 10149 states and 45639 transitions. [2022-11-20 20:53:27,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10149 states and 45639 transitions. [2022-11-20 20:53:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:53:27,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:27,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:27,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (127)] Ended with exit code 0 [2022-11-20 20:53:27,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:27,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:27,705 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:53:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:27,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1923011571, now seen corresponding path program 1 times [2022-11-20 20:53:27,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:53:27,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764943496] [2022-11-20 20:53:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:27,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:53:27,709 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:53:27,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-20 20:53:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:28,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:53:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:28,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:28,380 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:53:28,380 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 16 treesize of output 22 [2022-11-20 20:53:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:53:28,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:53:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:53:30,299 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:53:30,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764943496] [2022-11-20 20:53:30,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764943496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:30,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054097483] [2022-11-20 20:53:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:30,300 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:53:30,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:53:30,302 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:53:30,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (130)] Waiting until timeout for monitored process [2022-11-20 20:53:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:31,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:53:31,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:31,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:31,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:53:31,385 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 [2022-11-20 20:53:31,399 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:53:31,399 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 [2022-11-20 20:53:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:53:31,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:53:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:53:36,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054097483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:36,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016416307] [2022-11-20 20:53:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:36,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:53:36,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:53:36,838 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:53:36,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-20 20:53:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:37,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:53:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:37,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:37,584 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:53:37,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:53:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:53:37,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:53:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:53:38,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016416307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:53:38,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:53:38,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5, 5, 7, 7] total 19 [2022-11-20 20:53:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81433065] [2022-11-20 20:53:38,343 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:53:38,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:53:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:53:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:53:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=312, Unknown=1, NotChecked=0, Total=380 [2022-11-20 20:53:38,344 INFO L87 Difference]: Start difference. First operand 10149 states and 45639 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:44,226 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:53:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:52,863 INFO L93 Difference]: Finished difference Result 23430 states and 100274 transitions. [2022-11-20 20:53:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:53:52,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:53:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:52,968 INFO L225 Difference]: With dead ends: 23430 [2022-11-20 20:53:52,968 INFO L226 Difference]: Without dead ends: 23430 [2022-11-20 20:53:52,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=258, Invalid=931, Unknown=1, NotChecked=0, Total=1190 [2022-11-20 20:53:52,968 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 589 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1885 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:52,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 0 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 999 Invalid, 0 Unknown, 1885 Unchecked, 6.4s Time] [2022-11-20 20:53:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23430 states. [2022-11-20 20:53:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23430 to 12638. [2022-11-20 20:53:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12638 states, 12575 states have (on average 4.54831013916501) internal successors, (57195), 12637 states have internal predecessors, (57195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12638 states to 12638 states and 57195 transitions. [2022-11-20 20:53:53,468 INFO L78 Accepts]: Start accepts. Automaton has 12638 states and 57195 transitions. Word has length 13 [2022-11-20 20:53:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:53,469 INFO L495 AbstractCegarLoop]: Abstraction has 12638 states and 57195 transitions. [2022-11-20 20:53:53,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 12638 states and 57195 transitions. [2022-11-20 20:53:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:53:53,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:53,471 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:53,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Ended with exit code 0 [2022-11-20 20:53:53,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (130)] Ended with exit code 0 [2022-11-20 20:53:53,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-11-20 20:53:54,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:53:54,072 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:53:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1231057631, now seen corresponding path program 2 times [2022-11-20 20:53:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:53:54,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161654942] [2022-11-20 20:53:54,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:53:54,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:53:54,074 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:53:54,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-20 20:53:54,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:53:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:53:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:53:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:54,677 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:53:54,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:54,876 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:53:54,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:53:55,036 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 [2022-11-20 20:53:55,051 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:53:55,051 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 [2022-11-20 20:53:55,215 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:53:55,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:53:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:53:55,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:53:55,607 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:53:55,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161654942] [2022-11-20 20:53:55,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161654942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:53:55,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:53:55,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:53:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314501068] [2022-11-20 20:53:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:53:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:53:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:53:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:53:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:53:55,609 INFO L87 Difference]: Start difference. First operand 12638 states and 57195 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:53:56,244 INFO L93 Difference]: Finished difference Result 12679 states and 57346 transitions. [2022-11-20 20:53:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:53:56,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:53:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:53:56,300 INFO L225 Difference]: With dead ends: 12679 [2022-11-20 20:53:56,301 INFO L226 Difference]: Without dead ends: 12679 [2022-11-20 20:53:56,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:53:56,301 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:53:56,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-11-20 20:53:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12679 states. [2022-11-20 20:53:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12679 to 12653. [2022-11-20 20:53:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12653 states, 12590 states have (on average 4.547974583002383) internal successors, (57259), 12652 states have internal predecessors, (57259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12653 states to 12653 states and 57259 transitions. [2022-11-20 20:53:56,619 INFO L78 Accepts]: Start accepts. Automaton has 12653 states and 57259 transitions. Word has length 14 [2022-11-20 20:53:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:53:56,619 INFO L495 AbstractCegarLoop]: Abstraction has 12653 states and 57259 transitions. [2022-11-20 20:53:56,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:53:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12653 states and 57259 transitions. [2022-11-20 20:53:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:53:56,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:53:56,621 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:53:56,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-20 20:53:56,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:56,822 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:53:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:53:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1040286638, now seen corresponding path program 1 times [2022-11-20 20:53:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:53:56,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074709371] [2022-11-20 20:53:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:53:56,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:53:56,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:53:56,824 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:53:56,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-20 20:53:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:53:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 20:53:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:53:57,614 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:53:57,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:57,797 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:53:57,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:53:58,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:53:58,069 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 19 treesize of output 19 [2022-11-20 20:53:58,106 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:53:58,106 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 [2022-11-20 20:53:58,210 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:53:58,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-20 20:53:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:53:59,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:54:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:54:02,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:54:02,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074709371] [2022-11-20 20:54:02,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074709371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:54:02,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1818957259] [2022-11-20 20:54:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:54:02,713 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:54:02,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:54:02,714 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:54:02,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (134)] Waiting until timeout for monitored process [2022-11-20 20:54:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:54:03,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:54:03,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:54:03,911 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:54:03,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:54:04,113 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:54:04,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:04,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:54:04,732 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 [2022-11-20 20:54:04,745 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:54:04,746 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 [2022-11-20 20:54:04,832 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:54:04,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-20 20:54:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:54:05,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:54:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:54:08,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1818957259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:54:08,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084769163] [2022-11-20 20:54:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:54:08,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:54:08,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:54:08,695 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:54:08,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-11-20 20:54:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:54:09,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 20:54:09,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:54:09,400 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:54:09,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:09,597 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:54:09,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:54:10,170 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 [2022-11-20 20:54:10,204 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:54:10,205 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 [2022-11-20 20:54:10,407 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:54:10,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:54:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:54:11,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:54:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:54:15,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084769163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:54:15,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:54:15,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 38 [2022-11-20 20:54:15,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623205881] [2022-11-20 20:54:15,544 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:54:15,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 20:54:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:54:15,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 20:54:15,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 20:54:15,544 INFO L87 Difference]: Start difference. First operand 12653 states and 57259 transitions. Second operand has 40 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:25,790 WARN L233 SmtUtils]: Spent 8.98s on a formula simplification. DAG size of input: 56 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:54:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:54:34,459 INFO L93 Difference]: Finished difference Result 22408 states and 98883 transitions. [2022-11-20 20:54:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:54:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:54:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:54:34,570 INFO L225 Difference]: With dead ends: 22408 [2022-11-20 20:54:34,570 INFO L226 Difference]: Without dead ends: 22408 [2022-11-20 20:54:34,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 20:54:34,571 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 223 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1197 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:54:34,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 0 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 284 Invalid, 0 Unknown, 1197 Unchecked, 2.3s Time] [2022-11-20 20:54:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22408 states. [2022-11-20 20:54:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22408 to 13087. [2022-11-20 20:54:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13087 states, 13030 states have (on average 4.466001534919417) internal successors, (58192), 13086 states have internal predecessors, (58192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13087 states to 13087 states and 58192 transitions. [2022-11-20 20:54:35,133 INFO L78 Accepts]: Start accepts. Automaton has 13087 states and 58192 transitions. Word has length 14 [2022-11-20 20:54:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:54:35,133 INFO L495 AbstractCegarLoop]: Abstraction has 13087 states and 58192 transitions. [2022-11-20 20:54:35,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 13087 states and 58192 transitions. [2022-11-20 20:54:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:54:35,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:54:35,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:54:35,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (134)] Ended with exit code 0 [2022-11-20 20:54:35,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-20 20:54:35,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-11-20 20:54:35,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:54:35,737 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:54:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:54:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1721608735, now seen corresponding path program 1 times [2022-11-20 20:54:35,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:54:35,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303784504] [2022-11-20 20:54:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:54:35,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:54:35,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:54:35,740 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:54:35,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-20 20:54:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:54:36,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:54:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:54:36,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:36,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:36,732 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:54:36,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-20 20:54:36,783 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:54:36,784 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 [2022-11-20 20:54:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:54:37,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:54:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:54:40,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:54:40,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303784504] [2022-11-20 20:54:40,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303784504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:54:40,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1694117425] [2022-11-20 20:54:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:54:40,686 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:54:40,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:54:40,687 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:54:40,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (137)] Waiting until timeout for monitored process [2022-11-20 20:54:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:54:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:54:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:54:41,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 20:54:41,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:54:42,161 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 [2022-11-20 20:54:42,187 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:54:42,188 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 [2022-11-20 20:54:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:54:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:54:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:54:43,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1694117425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:54:43,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517260465] [2022-11-20 20:54:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:54:43,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:54:43,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:54:43,542 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:54:43,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-11-20 20:54:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:54:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:54:44,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:54:44,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:54:44,375 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 19 treesize of output 19 [2022-11-20 20:54:44,403 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:54:44,404 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 [2022-11-20 20:54:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:54:44,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:54:46,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:54:46,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 87 [2022-11-20 20:54:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:54:49,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517260465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:54:49,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:54:49,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7, 7, 7, 7] total 26 [2022-11-20 20:54:49,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981128973] [2022-11-20 20:54:49,839 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:54:49,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:54:49,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:54:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:54:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=584, Unknown=1, NotChecked=0, Total=702 [2022-11-20 20:54:49,840 INFO L87 Difference]: Start difference. First operand 13087 states and 58192 transitions. Second operand has 27 states, 26 states have (on average 1.8076923076923077) 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) [2022-11-20 20:54:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:54:56,533 INFO L93 Difference]: Finished difference Result 18048 states and 80849 transitions. [2022-11-20 20:54:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:54:56,536 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8076923076923077) 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 14 [2022-11-20 20:54:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:54:56,622 INFO L225 Difference]: With dead ends: 18048 [2022-11-20 20:54:56,622 INFO L226 Difference]: Without dead ends: 18048 [2022-11-20 20:54:56,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=126, Invalid=629, Unknown=1, NotChecked=0, Total=756 [2022-11-20 20:54:56,623 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:54:56,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 336 Unchecked, 1.9s Time] [2022-11-20 20:54:56,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18048 states. [2022-11-20 20:54:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18048 to 14468. [2022-11-20 20:54:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14468 states, 14411 states have (on average 4.563736034973284) internal successors, (65768), 14467 states have internal predecessors, (65768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14468 states to 14468 states and 65768 transitions. [2022-11-20 20:54:57,210 INFO L78 Accepts]: Start accepts. Automaton has 14468 states and 65768 transitions. Word has length 14 [2022-11-20 20:54:57,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:54:57,210 INFO L495 AbstractCegarLoop]: Abstraction has 14468 states and 65768 transitions. [2022-11-20 20:54:57,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8076923076923077) 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) [2022-11-20 20:54:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 14468 states and 65768 transitions. [2022-11-20 20:54:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:54:57,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:54:57,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:54:57,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-11-20 20:54:57,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (137)] Ended with exit code 0 [2022-11-20 20:54:57,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-20 20:54:57,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:54:57,815 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:54:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:54:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash 116564327, now seen corresponding path program 2 times [2022-11-20 20:54:57,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:54:57,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455386027] [2022-11-20 20:54:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:54:57,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:54:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:54:57,819 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:54:57,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-20 20:54:58,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:54:58,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:54:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:54:58,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:54:58,506 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:54:58,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:58,715 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:54:58,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:54:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:54:58,841 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 [2022-11-20 20:54:58,857 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:54:58,857 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 [2022-11-20 20:54:58,940 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:54:58,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:54:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:54:59,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:54:59,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:54:59,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455386027] [2022-11-20 20:54:59,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455386027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:54:59,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:54:59,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:54:59,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753668742] [2022-11-20 20:54:59,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:54:59,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:54:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:54:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:54:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:54:59,385 INFO L87 Difference]: Start difference. First operand 14468 states and 65768 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:55:00,094 INFO L93 Difference]: Finished difference Result 14513 states and 65916 transitions. [2022-11-20 20:55:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:55:00,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:55:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:55:00,163 INFO L225 Difference]: With dead ends: 14513 [2022-11-20 20:55:00,163 INFO L226 Difference]: Without dead ends: 14513 [2022-11-20 20:55:00,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:55:00,164 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:55:00,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 51 Unchecked, 0.6s Time] [2022-11-20 20:55:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14513 states. [2022-11-20 20:55:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14513 to 14485. [2022-11-20 20:55:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14485 states, 14428 states have (on average 4.562448017743277) internal successors, (65827), 14484 states have internal predecessors, (65827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14485 states to 14485 states and 65827 transitions. [2022-11-20 20:55:00,582 INFO L78 Accepts]: Start accepts. Automaton has 14485 states and 65827 transitions. Word has length 14 [2022-11-20 20:55:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:55:00,582 INFO L495 AbstractCegarLoop]: Abstraction has 14485 states and 65827 transitions. [2022-11-20 20:55:00,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 14485 states and 65827 transitions. [2022-11-20 20:55:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:55:00,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:00,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:00,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Forceful destruction successful, exit code 0 [2022-11-20 20:55:00,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:55:00,785 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:55:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash 116368004, now seen corresponding path program 3 times [2022-11-20 20:55:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:55:00,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150839250] [2022-11-20 20:55:00,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:55:00,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:55:00,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:55:00,787 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:55:00,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-20 20:55:01,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:55:01,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:55:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:55:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:55:01,467 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:55:01,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:55:01,685 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:55:01,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:55:01,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:55:01,825 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 [2022-11-20 20:55:01,849 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:55:01,849 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 [2022-11-20 20:55:01,929 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:55:01,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:55:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:55:02,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:55:02,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:55:02,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150839250] [2022-11-20 20:55:02,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150839250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:55:02,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:55:02,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:55:02,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950274473] [2022-11-20 20:55:02,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:55:02,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:55:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:55:02,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:55:02,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:55:02,397 INFO L87 Difference]: Start difference. First operand 14485 states and 65827 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:55:03,098 INFO L93 Difference]: Finished difference Result 14501 states and 65871 transitions. [2022-11-20 20:55:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:55:03,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:55:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:55:03,168 INFO L225 Difference]: With dead ends: 14501 [2022-11-20 20:55:03,168 INFO L226 Difference]: Without dead ends: 14501 [2022-11-20 20:55:03,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:55:03,169 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:55:03,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 50 Unchecked, 0.6s Time] [2022-11-20 20:55:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14501 states. [2022-11-20 20:55:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14501 to 14463. [2022-11-20 20:55:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14463 states, 14406 states have (on average 4.562265722615577) internal successors, (65724), 14462 states have internal predecessors, (65724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14463 states to 14463 states and 65724 transitions. [2022-11-20 20:55:03,579 INFO L78 Accepts]: Start accepts. Automaton has 14463 states and 65724 transitions. Word has length 14 [2022-11-20 20:55:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:55:03,579 INFO L495 AbstractCegarLoop]: Abstraction has 14463 states and 65724 transitions. [2022-11-20 20:55:03,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 14463 states and 65724 transitions. [2022-11-20 20:55:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:55:03,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:03,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:03,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Forceful destruction successful, exit code 0 [2022-11-20 20:55:03,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:55:03,782 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:55:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash 116374607, now seen corresponding path program 3 times [2022-11-20 20:55:03,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:55:03,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251052740] [2022-11-20 20:55:03,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:55:03,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:55:03,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:55:03,784 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:55:03,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-20 20:55:04,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:55:04,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:55:04,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:55:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:55:04,502 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:55:04,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:55:04,703 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:55:04,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 20:55:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:55:04,811 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 [2022-11-20 20:55:04,827 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 20:55:04,827 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 [2022-11-20 20:55:04,913 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 20:55:04,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:55:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:55:05,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:55:05,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:55:05,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251052740] [2022-11-20 20:55:05,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251052740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:55:05,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:55:05,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:55:05,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834972758] [2022-11-20 20:55:05,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:55:05,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:55:05,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:55:05,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:55:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:55:05,480 INFO L87 Difference]: Start difference. First operand 14463 states and 65724 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:55:06,197 INFO L93 Difference]: Finished difference Result 14487 states and 65787 transitions. [2022-11-20 20:55:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:55:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:55:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:55:06,265 INFO L225 Difference]: With dead ends: 14487 [2022-11-20 20:55:06,265 INFO L226 Difference]: Without dead ends: 14487 [2022-11-20 20:55:06,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:55:06,266 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:55:06,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2022-11-20 20:55:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14487 states. [2022-11-20 20:55:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14487 to 14443. [2022-11-20 20:55:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14443 states, 14386 states have (on average 4.562908383150285) internal successors, (65642), 14442 states have internal predecessors, (65642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14443 states to 14443 states and 65642 transitions. [2022-11-20 20:55:06,650 INFO L78 Accepts]: Start accepts. Automaton has 14443 states and 65642 transitions. Word has length 14 [2022-11-20 20:55:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:55:06,650 INFO L495 AbstractCegarLoop]: Abstraction has 14443 states and 65642 transitions. [2022-11-20 20:55:06,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 14443 states and 65642 transitions. [2022-11-20 20:55:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:55:06,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:06,652 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:06,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Forceful destruction successful, exit code 0 [2022-11-20 20:55:06,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:55:06,853 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:55:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1862031931, now seen corresponding path program 1 times [2022-11-20 20:55:06,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:55:06,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75241889] [2022-11-20 20:55:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:06,854 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 [2022-11-20 20:55:06,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:55:06,855 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:55:06,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-20 20:55:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:07,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:55:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:55:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:55:07,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:55:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:55:07,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:55:07,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75241889] [2022-11-20 20:55:07,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75241889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:55:07,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1631233317] [2022-11-20 20:55:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:07,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:55:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:55:07,880 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:55:07,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (143)] Waiting until timeout for monitored process [2022-11-20 20:55:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:08,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:55:08,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:55:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:55:08,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:55:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:55:08,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1631233317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:55:08,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077007074] [2022-11-20 20:55:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:08,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:55:08,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:55:08,956 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:55:08,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-20 20:55:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:55:09,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:55:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:55:09,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:55:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:55:09,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077007074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:55:09,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:55:09,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2022-11-20 20:55:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530537569] [2022-11-20 20:55:09,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:55:09,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 20:55:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:55:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 20:55:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:55:09,624 INFO L87 Difference]: Start difference. First operand 14443 states and 65642 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:55:13,188 INFO L93 Difference]: Finished difference Result 18325 states and 80056 transitions. [2022-11-20 20:55:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:55:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:55:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:55:13,275 INFO L225 Difference]: With dead ends: 18325 [2022-11-20 20:55:13,275 INFO L226 Difference]: Without dead ends: 18325 [2022-11-20 20:55:13,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:55:13,276 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 347 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:55:13,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 0 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 20:55:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18325 states. [2022-11-20 20:55:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18325 to 14009. [2022-11-20 20:55:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14009 states, 13952 states have (on average 4.594968463302752) internal successors, (64109), 14008 states have internal predecessors, (64109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14009 states to 14009 states and 64109 transitions. [2022-11-20 20:55:13,767 INFO L78 Accepts]: Start accepts. Automaton has 14009 states and 64109 transitions. Word has length 14 [2022-11-20 20:55:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:55:13,768 INFO L495 AbstractCegarLoop]: Abstraction has 14009 states and 64109 transitions. [2022-11-20 20:55:13,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14009 states and 64109 transitions. [2022-11-20 20:55:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:55:13,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:13,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:13,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-11-20 20:55:13,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (143)] Forceful destruction successful, exit code 0 [2022-11-20 20:55:14,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Ended with exit code 0 [2022-11-20 20:55:14,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:55:14,371 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 20:55:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1235403230, now seen corresponding path program 1 times [2022-11-20 20:55:14,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:55:14,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159525015] [2022-11-20 20:55:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:14,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:55:14,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:55:14,374 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:55:14,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e22c2e85-1562-4738-9d1b-d5ec4b100e0b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-20 20:55:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:14,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:55:14,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:55:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:55:15,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:55:15,021 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:55:15,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159525015] [2022-11-20 20:55:15,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159525015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:55:15,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:55:15,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:55:15,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66704790] [2022-11-20 20:55:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:55:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:55:15,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:55:15,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:55:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:55:15,022 INFO L87 Difference]: Start difference. First operand 14009 states and 64109 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)