./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba --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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- 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-b5237d8 [2022-11-22 01:37:12,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:37:12,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:37:12,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:37:12,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:37:12,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:37:12,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:37:12,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:37:12,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:37:12,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:37:12,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:37:12,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:37:12,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:37:12,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:37:12,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:37:12,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:37:12,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:37:12,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:37:12,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:37:12,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:37:12,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:37:12,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:37:12,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:37:12,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:37:12,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:37:12,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:37:12,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:37:12,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:37:12,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:37:12,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:37:12,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:37:12,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:37:12,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:37:12,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:37:12,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:37:12,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:37:12,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:37:12,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:37:12,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:37:12,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:37:12,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:37:12,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:37:12,658 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:37:12,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:37:12,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:37:12,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:37:12,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:37:12,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:37:12,661 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:37:12,662 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:37:12,662 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:37:12,663 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:37:12,663 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:37:12,664 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:37:12,664 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:37:12,664 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:37:12,665 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:37:12,665 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:37:12,666 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:37:12,666 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:37:12,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:37:12,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:37:12,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:37:12,668 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:37:12,669 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:37:12,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:37:12,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:37:12,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:37:12,670 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:37:12,670 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:37:12,671 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:37:12,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:37:12,672 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:37:12,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:37:12,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:37:12,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:37:12,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:37:12,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:37:12,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:37:12,674 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:37:12,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:37:12,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:37:12,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:37:12,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:37:12,676 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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-11-22 01:37:13,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:37:13,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:37:13,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:37:13,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:37:13,084 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:37:13,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-22 01:37:16,753 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:37:17,026 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:37:17,027 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-22 01:37:17,035 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/data/fc990226e/2705140eb4394a79a4adcb74dcf1328d/FLAG67c04c85b [2022-11-22 01:37:17,053 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/data/fc990226e/2705140eb4394a79a4adcb74dcf1328d [2022-11-22 01:37:17,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:37:17,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:37:17,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:37:17,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:37:17,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:37:17,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:37:17" (1/1) ... [2022-11-22 01:37:17,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78386396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:17, skipping insertion in model container [2022-11-22 01:37:17,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:37:17" (1/1) ... [2022-11-22 01:37:17,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:37:17,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:37:17,307 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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-22 01:37:17,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:37:17,333 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) [2022-11-22 01:37:17,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@363624ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:17, skipping insertion in model container [2022-11-22 01:37:17,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:37:17,335 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 01:37:17,337 INFO L158 Benchmark]: Toolchain (without parser) took 277.46ms. Allocated memory is still 180.4MB. Free memory was 140.7MB in the beginning and 131.3MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:37:17,338 INFO L158 Benchmark]: CDTParser took 14.32ms. Allocated memory is still 130.0MB. Free memory was 71.6MB in the beginning and 96.1MB in the end (delta: -24.5MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2022-11-22 01:37:17,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.29ms. Allocated memory is still 180.4MB. Free memory was 140.7MB in the beginning and 131.3MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:37:17,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 14.32ms. Allocated memory is still 130.0MB. Free memory was 71.6MB in the beginning and 96.1MB in the end (delta: -24.5MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.29ms. Allocated memory is still 180.4MB. Free memory was 140.7MB in the beginning and 131.3MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 95]: 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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba --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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- 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-b5237d8 [2022-11-22 01:37:20,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:37:20,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:37:20,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:37:20,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:37:20,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:37:20,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:37:20,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:37:20,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:37:20,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:37:20,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:37:20,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:37:20,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:37:20,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:37:20,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:37:20,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:37:20,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:37:20,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:37:20,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:37:20,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:37:20,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:37:20,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:37:20,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:37:20,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:37:20,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:37:20,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:37:20,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:37:20,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:37:20,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:37:20,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:37:20,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:37:20,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:37:20,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:37:20,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:37:20,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:37:20,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:37:20,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:37:20,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:37:20,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:37:20,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:37:20,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:37:20,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 01:37:20,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:37:20,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:37:20,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:37:20,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:37:20,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:37:20,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:37:20,419 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:37:20,419 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:37:20,419 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:37:20,419 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:37:20,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:37:20,419 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:37:20,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:37:20,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:37:20,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:37:20,421 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:37:20,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:37:20,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:37:20,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:37:20,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:37:20,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:37:20,422 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:37:20,422 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:37:20,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:37:20,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:37:20,422 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 01:37:20,422 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 01:37:20,422 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:37:20,423 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:37:20,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:37:20,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 01:37:20,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:37:20,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:37:20,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:37:20,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:37:20,424 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 01:37:20,424 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 01:37:20,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:37:20,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 01:37:20,424 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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-11-22 01:37:20,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:37:20,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:37:20,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:37:20,887 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:37:20,887 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:37:20,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-22 01:37:24,649 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:37:24,874 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:37:24,875 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-22 01:37:24,883 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/data/9f0a3789c/6f0835afa3db48ab97b66cdad72342e0/FLAG2a55b1a36 [2022-11-22 01:37:24,908 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/data/9f0a3789c/6f0835afa3db48ab97b66cdad72342e0 [2022-11-22 01:37:24,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:37:24,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:37:24,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:37:24,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:37:24,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:37:24,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:37:24" (1/1) ... [2022-11-22 01:37:24,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e871cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:24, skipping insertion in model container [2022-11-22 01:37:24,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:37:24" (1/1) ... [2022-11-22 01:37:24,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:37:24,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:37:25,282 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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-22 01:37:25,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:37:25,313 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 01:37:25,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:37:25,330 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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-22 01:37:25,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:37:25,344 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:37:25,374 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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-22 01:37:25,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:37:25,400 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:37:25,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25 WrapperNode [2022-11-22 01:37:25,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:37:25,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:37:25,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:37:25,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:37:25,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,498 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2022-11-22 01:37:25,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:37:25,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:37:25,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:37:25,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:37:25,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,534 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:37:25,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:37:25,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:37:25,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:37:25,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (1/1) ... [2022-11-22 01:37:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:37:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:25,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:37:25,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:37:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:37:25,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 01:37:25,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:37:25,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 01:37:25,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 01:37:25,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 01:37:25,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 01:37:25,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 01:37:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:37:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:37:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:37:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:37:25,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:37:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:37:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 01:37:25,663 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:37:25,814 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:37:25,817 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:37:26,602 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:37:26,758 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:37:26,759 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 01:37:26,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:37:26 BoogieIcfgContainer [2022-11-22 01:37:26,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:37:26,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:37:26,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:37:26,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:37:26,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:37:24" (1/3) ... [2022-11-22 01:37:26,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5020ffd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:37:26, skipping insertion in model container [2022-11-22 01:37:26,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:25" (2/3) ... [2022-11-22 01:37:26,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5020ffd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:37:26, skipping insertion in model container [2022-11-22 01:37:26,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:37:26" (3/3) ... [2022-11-22 01:37:26,806 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-11-22 01:37:26,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:37:26,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-22 01:37:26,832 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:37:26,944 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-22 01:37:27,008 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:37:27,034 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 135 transitions, 286 flow [2022-11-22 01:37:27,040 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 135 transitions, 286 flow [2022-11-22 01:37:27,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 286 flow [2022-11-22 01:37:27,123 INFO L130 PetriNetUnfolder]: 9/133 cut-off events. [2022-11-22 01:37:27,123 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-22 01:37:27,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 133 events. 9/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 112 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2022-11-22 01:37:27,131 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-11-22 01:37:49,539 INFO L134 LiptonReduction]: Checked pairs total: 947 [2022-11-22 01:37:49,540 INFO L136 LiptonReduction]: Total number of compositions: 152 [2022-11-22 01:37:49,550 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 82 flow [2022-11-22 01:37:49,576 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:49,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:37:49,608 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;@2a645cb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:37:49,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-22 01:37:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:37:49,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:49,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:37:49,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash 19025, now seen corresponding path program 1 times [2022-11-22 01:37:49,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:49,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067190956] [2022-11-22 01:37:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:49,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:49,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:49,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:49,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:37:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:49,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:50,022 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:37:50,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-22 01:37:50,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:37:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:50,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:50,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:50,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067190956] [2022-11-22 01:37:50,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067190956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:50,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:50,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:37:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869094617] [2022-11-22 01:37:50,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:50,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:50,195 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 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) [2022-11-22 01:37:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:50,423 INFO L93 Difference]: Finished difference Result 88 states and 201 transitions. [2022-11-22 01:37:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:50,426 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 [2022-11-22 01:37:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:50,442 INFO L225 Difference]: With dead ends: 88 [2022-11-22 01:37:50,443 INFO L226 Difference]: Without dead ends: 88 [2022-11-22 01:37:50,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:50,450 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:50,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:37:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-22 01:37:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-22 01:37:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 3.6545454545454548) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2022-11-22 01:37:50,520 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 2 [2022-11-22 01:37:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:50,522 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2022-11-22 01:37:50,524 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) [2022-11-22 01:37:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2022-11-22 01:37:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:37:50,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:50,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:37:50,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:50,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:50,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:50,746 INFO L85 PathProgramCache]: Analyzing trace with hash 19026, now seen corresponding path program 1 times [2022-11-22 01:37:50,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698621184] [2022-11-22 01:37:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:50,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:50,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:50,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:50,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:50,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:37:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:50,952 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-22 01:37:50,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-22 01:37:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:51,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:51,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698621184] [2022-11-22 01:37:51,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698621184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:51,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:51,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:37:51,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967020189] [2022-11-22 01:37:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:51,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:51,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:51,028 INFO L87 Difference]: Start difference. First operand 88 states and 201 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) [2022-11-22 01:37:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:51,199 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2022-11-22 01:37:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:51,200 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 [2022-11-22 01:37:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:51,201 INFO L225 Difference]: With dead ends: 71 [2022-11-22 01:37:51,201 INFO L226 Difference]: Without dead ends: 71 [2022-11-22 01:37:51,202 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 [2022-11-22 01:37:51,203 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:51,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:37:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-22 01:37:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-22 01:37:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 3.1666666666666665) internal successors, (152), 70 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 152 transitions. [2022-11-22 01:37:51,214 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 152 transitions. Word has length 2 [2022-11-22 01:37:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:51,214 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 152 transitions. [2022-11-22 01:37:51,214 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) [2022-11-22 01:37:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 152 transitions. [2022-11-22 01:37:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:37:51,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:51,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:37:51,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:51,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:51,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:51,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash 18903, now seen corresponding path program 1 times [2022-11-22 01:37:51,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:51,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942067148] [2022-11-22 01:37:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:51,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:51,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:51,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:51,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:51,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:37:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:51,606 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-22 01:37:51,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-22 01:37:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:51,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:51,622 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:51,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942067148] [2022-11-22 01:37:51,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942067148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:51,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:51,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:37:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376131943] [2022-11-22 01:37:51,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:51,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:51,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:51,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:51,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:51,626 INFO L87 Difference]: Start difference. First operand 71 states and 152 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) [2022-11-22 01:37:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:51,828 INFO L93 Difference]: Finished difference Result 70 states and 151 transitions. [2022-11-22 01:37:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:51,829 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 [2022-11-22 01:37:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:51,831 INFO L225 Difference]: With dead ends: 70 [2022-11-22 01:37:51,831 INFO L226 Difference]: Without dead ends: 70 [2022-11-22 01:37:51,831 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 [2022-11-22 01:37:51,832 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:51,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:37:51,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-22 01:37:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-22 01:37:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 69 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 151 transitions. [2022-11-22 01:37:51,841 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 151 transitions. Word has length 2 [2022-11-22 01:37:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:51,842 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 151 transitions. [2022-11-22 01:37:51,842 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) [2022-11-22 01:37:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 151 transitions. [2022-11-22 01:37:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:37:51,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:51,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:37:51,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:52,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:52,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:52,058 INFO L85 PathProgramCache]: Analyzing trace with hash 18904, now seen corresponding path program 1 times [2022-11-22 01:37:52,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:52,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475552058] [2022-11-22 01:37:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:52,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:52,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:52,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:52,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-22 01:37:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:52,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:37:52,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:52,278 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:37:52,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:37:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:52,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:52,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475552058] [2022-11-22 01:37:52,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475552058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:52,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:52,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:37:52,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568143490] [2022-11-22 01:37:52,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:52,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:52,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:52,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:52,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:52,329 INFO L87 Difference]: Start difference. First operand 70 states and 151 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) [2022-11-22 01:37:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:52,688 INFO L93 Difference]: Finished difference Result 138 states and 300 transitions. [2022-11-22 01:37:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:52,689 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 [2022-11-22 01:37:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:52,691 INFO L225 Difference]: With dead ends: 138 [2022-11-22 01:37:52,691 INFO L226 Difference]: Without dead ends: 138 [2022-11-22 01:37:52,692 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 [2022-11-22 01:37:52,693 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:52,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:37:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-22 01:37:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 71. [2022-11-22 01:37:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 3.122448979591837) internal successors, (153), 70 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 153 transitions. [2022-11-22 01:37:52,719 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 153 transitions. Word has length 2 [2022-11-22 01:37:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:52,720 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 153 transitions. [2022-11-22 01:37:52,720 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) [2022-11-22 01:37:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 153 transitions. [2022-11-22 01:37:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:37:52,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:52,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:37:52,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:52,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:52,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:52,925 INFO L85 PathProgramCache]: Analyzing trace with hash 590048, now seen corresponding path program 1 times [2022-11-22 01:37:52,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:52,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112579832] [2022-11-22 01:37:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:52,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:52,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:52,927 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:52,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-22 01:37:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:37:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:53,138 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:37:53,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:37:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:53,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:37:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:53,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112579832] [2022-11-22 01:37:53,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112579832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:37:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749157416] [2022-11-22 01:37:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:53,557 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:37:53,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:37:53,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:37:53,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-22 01:37:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:37:53,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:53,848 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:37:53,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:37:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:53,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:37:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:54,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [749157416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:37:54,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988356778] [2022-11-22 01:37:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:54,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:54,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:54,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:54,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:37:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:54,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:37:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:54,216 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:37:54,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:37:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:54,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:37:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:54,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988356778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:37:54,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:37:54,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-22 01:37:54,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431879117] [2022-11-22 01:37:54,523 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:37:54,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:37:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:54,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:37:54,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:37:54,525 INFO L87 Difference]: Start difference. First operand 71 states and 153 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) [2022-11-22 01:37:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:55,990 INFO L93 Difference]: Finished difference Result 275 states and 600 transitions. [2022-11-22 01:37:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:37:55,992 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 [2022-11-22 01:37:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:55,995 INFO L225 Difference]: With dead ends: 275 [2022-11-22 01:37:55,995 INFO L226 Difference]: Without dead ends: 275 [2022-11-22 01:37:55,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:37:55,996 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 188 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:55,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:37:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-22 01:37:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 74. [2022-11-22 01:37:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 73 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 159 transitions. [2022-11-22 01:37:56,017 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 159 transitions. Word has length 3 [2022-11-22 01:37:56,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:56,017 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 159 transitions. [2022-11-22 01:37:56,017 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) [2022-11-22 01:37:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 159 transitions. [2022-11-22 01:37:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:37:56,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:56,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:37:56,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:56,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:56,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:56,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:37:56,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:56,620 INFO L85 PathProgramCache]: Analyzing trace with hash 18295325, now seen corresponding path program 1 times [2022-11-22 01:37:56,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:56,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210434758] [2022-11-22 01:37:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:56,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:56,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:56,622 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:56,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:56,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:37:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:56,754 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-22 01:37:56,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-22 01:37:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:56,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:56,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210434758] [2022-11-22 01:37:56,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210434758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:56,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:56,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:37:56,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112509263] [2022-11-22 01:37:56,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:56,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:56,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:56,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:56,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:56,789 INFO L87 Difference]: Start difference. First operand 74 states and 159 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:56,917 INFO L93 Difference]: Finished difference Result 66 states and 143 transitions. [2022-11-22 01:37:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:37:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:56,920 INFO L225 Difference]: With dead ends: 66 [2022-11-22 01:37:56,920 INFO L226 Difference]: Without dead ends: 66 [2022-11-22 01:37:56,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:56,921 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:56,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:37:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-22 01:37:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-22 01:37:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 2.86) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2022-11-22 01:37:56,929 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 4 [2022-11-22 01:37:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:56,929 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2022-11-22 01:37:56,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2022-11-22 01:37:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:37:56,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:56,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:37:56,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:57,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:57,152 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:57,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash 18295294, now seen corresponding path program 1 times [2022-11-22 01:37:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:57,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103365335] [2022-11-22 01:37:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:57,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:57,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:57,156 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:57,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:37:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:57,300 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-22 01:37:57,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-22 01:37:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:57,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:57,331 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103365335] [2022-11-22 01:37:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103365335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:57,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:57,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:37:57,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849021178] [2022-11-22 01:37:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:57,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:37:57,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:57,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:37:57,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:37:57,333 INFO L87 Difference]: Start difference. First operand 66 states and 143 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) [2022-11-22 01:37:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:57,487 INFO L93 Difference]: Finished difference Result 46 states and 96 transitions. [2022-11-22 01:37:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:37:57,489 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 [2022-11-22 01:37:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:57,489 INFO L225 Difference]: With dead ends: 46 [2022-11-22 01:37:57,489 INFO L226 Difference]: Without dead ends: 46 [2022-11-22 01:37:57,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:37:57,491 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:57,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:37:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-22 01:37:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-22 01:37:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2022-11-22 01:37:57,494 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 4 [2022-11-22 01:37:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:57,500 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2022-11-22 01:37:57,501 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) [2022-11-22 01:37:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2022-11-22 01:37:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:37:57,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:57,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:37:57,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:57,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:57,702 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash 18295327, now seen corresponding path program 1 times [2022-11-22 01:37:57,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:57,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788151898] [2022-11-22 01:37:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:57,703 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 [2022-11-22 01:37:57,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:57,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:57,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:37:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:37:57,865 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-22 01:37:57,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-22 01:37:57,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-22 01:37:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:57,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:57,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:57,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788151898] [2022-11-22 01:37:57,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788151898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:57,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:57,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:37:57,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235284013] [2022-11-22 01:37:57,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:57,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:57,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:57,933 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:58,053 INFO L93 Difference]: Finished difference Result 40 states and 84 transitions. [2022-11-22 01:37:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:37:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:58,054 INFO L225 Difference]: With dead ends: 40 [2022-11-22 01:37:58,054 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 01:37:58,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:37:58,055 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:58,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:37:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 01:37:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-22 01:37:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 2.4) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2022-11-22 01:37:58,059 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 4 [2022-11-22 01:37:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:58,060 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2022-11-22 01:37:58,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2022-11-22 01:37:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:37:58,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:58,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:37:58,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:37:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:58,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash 18295295, now seen corresponding path program 1 times [2022-11-22 01:37:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:58,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792749445] [2022-11-22 01:37:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:58,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:58,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:58,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:58,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-22 01:37:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:58,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:37:58,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:58,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:58,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:37:58,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792749445] [2022-11-22 01:37:58,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792749445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:58,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:58,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:37:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929203340] [2022-11-22 01:37:58,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:58,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:37:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:37:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:37:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:37:58,421 INFO L87 Difference]: Start difference. First operand 40 states and 84 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) [2022-11-22 01:37:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:58,662 INFO L93 Difference]: Finished difference Result 59 states and 111 transitions. [2022-11-22 01:37:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:37:58,663 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 [2022-11-22 01:37:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:58,664 INFO L225 Difference]: With dead ends: 59 [2022-11-22 01:37:58,664 INFO L226 Difference]: Without dead ends: 59 [2022-11-22 01:37:58,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:37:58,665 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:58,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:37:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-22 01:37:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2022-11-22 01:37:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 52 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:37:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 106 transitions. [2022-11-22 01:37:58,670 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 106 transitions. Word has length 4 [2022-11-22 01:37:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:58,670 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 106 transitions. [2022-11-22 01:37:58,670 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) [2022-11-22 01:37:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 106 transitions. [2022-11-22 01:37:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:37:58,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:58,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:37:58,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:58,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:58,882 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:37:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:58,883 INFO L85 PathProgramCache]: Analyzing trace with hash 567164679, now seen corresponding path program 1 times [2022-11-22 01:37:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:37:58,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661572860] [2022-11-22 01:37:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:58,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:37:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:37:58,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:37:58,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-22 01:37:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:58,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:37:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:59,095 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:37:59,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:37:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:37:59,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:00,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:38:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661572860] [2022-11-22 01:38:00,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661572860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1889856769] [2022-11-22 01:38:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:00,330 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:38:00,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:38:00,332 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:38:00,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-22 01:38:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:38:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:00,585 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:00,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:00,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:01,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1889856769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:01,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071628621] [2022-11-22 01:38:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:01,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:01,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:01,094 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:01,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:38:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:38:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:01,293 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:01,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:01,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:01,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071628621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:01,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:38:01,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-22 01:38:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180925060] [2022-11-22 01:38:01,715 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:38:01,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:38:01,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:38:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:38:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:38:01,716 INFO L87 Difference]: Start difference. First operand 53 states and 106 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2022-11-22 01:38:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:05,576 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2022-11-22 01:38:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:38:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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 5 [2022-11-22 01:38:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:05,578 INFO L225 Difference]: With dead ends: 97 [2022-11-22 01:38:05,579 INFO L226 Difference]: Without dead ends: 97 [2022-11-22 01:38:05,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:38:05,580 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:05,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 01:38:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-22 01:38:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2022-11-22 01:38:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 140 transitions. [2022-11-22 01:38:05,585 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 140 transitions. Word has length 5 [2022-11-22 01:38:05,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:05,586 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 140 transitions. [2022-11-22 01:38:05,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2022-11-22 01:38:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 140 transitions. [2022-11-22 01:38:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:38:05,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:05,587 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 01:38:05,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 01:38:05,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:06,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:06,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:06,202 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:38:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:06,202 INFO L85 PathProgramCache]: Analyzing trace with hash 402246616, now seen corresponding path program 2 times [2022-11-22 01:38:06,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:38:06,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43687517] [2022-11-22 01:38:06,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:38:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:38:06,204 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:38:06,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:06,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:38:06,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:38:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:06,420 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:06,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:06,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:07,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:38:07,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43687517] [2022-11-22 01:38:07,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43687517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:07,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1566857865] [2022-11-22 01:38:07,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:38:07,697 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:38:07,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:38:07,698 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:38:07,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-22 01:38:07,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:38:07,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:07,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:38:07,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:08,012 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:08,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:08,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:08,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1566857865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:08,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606125231] [2022-11-22 01:38:08,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:38:08,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:08,403 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:08,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:38:08,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:38:08,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:08,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:38:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:08,639 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:08,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:08,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:09,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606125231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:09,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:38:09,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-22 01:38:09,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568187170] [2022-11-22 01:38:09,035 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:38:09,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:38:09,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:38:09,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:38:09,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:38:09,036 INFO L87 Difference]: Start difference. First operand 66 states and 140 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:13,276 INFO L93 Difference]: Finished difference Result 287 states and 600 transitions. [2022-11-22 01:38:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:38:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:38:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:13,281 INFO L225 Difference]: With dead ends: 287 [2022-11-22 01:38:13,281 INFO L226 Difference]: Without dead ends: 287 [2022-11-22 01:38:13,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:38:13,283 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 455 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:13,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 0 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 01:38:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-22 01:38:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 72. [2022-11-22 01:38:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2022-11-22 01:38:13,303 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 6 [2022-11-22 01:38:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:13,304 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2022-11-22 01:38:13,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2022-11-22 01:38:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:38:13,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:13,306 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-22 01:38:13,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:13,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:13,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:13,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:13,920 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:38:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash 12069887, now seen corresponding path program 2 times [2022-11-22 01:38:13,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:38:13,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556818193] [2022-11-22 01:38:13,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:38:13,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:13,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:38:13,922 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:38:13,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:14,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 01:38:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:38:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:14,125 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:14,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:38:14,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:14,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:38:14,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556818193] [2022-11-22 01:38:14,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556818193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:14,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:14,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:38:14,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133354853] [2022-11-22 01:38:14,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:14,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:38:14,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:38:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:38:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:38:14,256 INFO L87 Difference]: Start difference. First operand 72 states and 152 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) [2022-11-22 01:38:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:14,445 INFO L93 Difference]: Finished difference Result 58 states and 119 transitions. [2022-11-22 01:38:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:38:14,445 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 8 [2022-11-22 01:38:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:14,446 INFO L225 Difference]: With dead ends: 58 [2022-11-22 01:38:14,446 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 01:38:14,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:38:14,447 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:14,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:38:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 01:38:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2022-11-22 01:38:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2022-11-22 01:38:14,451 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 8 [2022-11-22 01:38:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:14,451 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2022-11-22 01:38:14,451 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) [2022-11-22 01:38:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2022-11-22 01:38:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:38:14,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:14,452 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-22 01:38:14,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:14,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:14,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:38:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1678257880, now seen corresponding path program 3 times [2022-11-22 01:38:14,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:38:14,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348716208] [2022-11-22 01:38:14,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:38:14,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:38:14,666 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:38:14,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:14,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:38:14,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:14,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:38:14,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:15,039 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:15,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:15,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:19,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:38:19,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348716208] [2022-11-22 01:38:19,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348716208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:19,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1732018921] [2022-11-22 01:38:19,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:38:19,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:38:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:38:19,409 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:38:19,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-22 01:38:20,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:38:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:38:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:20,376 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:20,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:20,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:24,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1732018921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:24,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359600352] [2022-11-22 01:38:24,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:38:24,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:24,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:24,706 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:24,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 01:38:27,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:38:27,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:38:27,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:38:27,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:27,173 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:38:27,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:38:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:27,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:27,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359600352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:27,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:38:27,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-22 01:38:27,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327094771] [2022-11-22 01:38:27,948 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:38:27,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:38:27,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:38:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:38:27,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:38:27,950 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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) [2022-11-22 01:38:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:52,328 INFO L93 Difference]: Finished difference Result 443 states and 894 transitions. [2022-11-22 01:38:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:38:52,330 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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 12 [2022-11-22 01:38:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:52,333 INFO L225 Difference]: With dead ends: 443 [2022-11-22 01:38:52,333 INFO L226 Difference]: Without dead ends: 443 [2022-11-22 01:38:52,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:38:52,335 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2248 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2162 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:52,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 0 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2162 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-22 01:38:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-22 01:38:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 57. [2022-11-22 01:38:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.981818181818182) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 109 transitions. [2022-11-22 01:38:52,344 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 109 transitions. Word has length 12 [2022-11-22 01:38:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:52,345 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 109 transitions. [2022-11-22 01:38:52,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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) [2022-11-22 01:38:52,345 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 109 transitions. [2022-11-22 01:38:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:38:52,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:52,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:52,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:52,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:52,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:52,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:38:52,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:38:52,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash -45030629, now seen corresponding path program 1 times [2022-11-22 01:38:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:38:52,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272465971] [2022-11-22 01:38:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:52,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:52,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:38:52,962 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:38:52,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:38:53,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:53,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:53,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:38:53,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272465971] [2022-11-22 01:38:53,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272465971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:53,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:53,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:38:53,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334312670] [2022-11-22 01:38:53,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:53,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:53,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:38:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:38:53,112 INFO L87 Difference]: Start difference. First operand 57 states and 109 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2022-11-22 01:38:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:53,230 INFO L93 Difference]: Finished difference Result 70 states and 138 transitions. [2022-11-22 01:38:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:53,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 [2022-11-22 01:38:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:53,231 INFO L225 Difference]: With dead ends: 70 [2022-11-22 01:38:53,231 INFO L226 Difference]: Without dead ends: 50 [2022-11-22 01:38:53,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:38:53,233 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:53,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:38:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-22 01:38:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-22 01:38:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2022-11-22 01:38:53,237 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 12 [2022-11-22 01:38:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:53,238 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2022-11-22 01:38:53,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2022-11-22 01:38:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2022-11-22 01:38:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:38:53,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:53,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:53,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:53,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:53,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:38:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1463812854, now seen corresponding path program 1 times [2022-11-22 01:38:53,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:38:53,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070510905] [2022-11-22 01:38:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:53,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:53,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:38:53,445 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:38:53,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:38:53,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:38:53,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:53,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:38:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070510905] [2022-11-22 01:38:53,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070510905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:53,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:53,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:38:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721404908] [2022-11-22 01:38:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:53,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:53,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:38:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:53,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:38:53,626 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:53,739 INFO L93 Difference]: Finished difference Result 60 states and 116 transitions. [2022-11-22 01:38:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:53,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 01:38:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:53,741 INFO L225 Difference]: With dead ends: 60 [2022-11-22 01:38:53,741 INFO L226 Difference]: Without dead ends: 54 [2022-11-22 01:38:53,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:38:53,742 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:53,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:38:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-22 01:38:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-22 01:38:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2022-11-22 01:38:53,749 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 14 [2022-11-22 01:38:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:53,749 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2022-11-22 01:38:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:38:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2022-11-22 01:38:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:38:53,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:53,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:53,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:53,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:53,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:38:53,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1598735948, now seen corresponding path program 1 times [2022-11-22 01:38:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:38:53,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292589348] [2022-11-22 01:38:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:53,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:38:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:38:53,968 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:38:53,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:38:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:54,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:38:54,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:54,181 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 [2022-11-22 01:38:54,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-22 01:38:54,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:38:54,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-22 01:38:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:38:54,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:54,626 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_631 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) (_ bv5 32))) is different from false [2022-11-22 01:38:54,853 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-22 01:38:54,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-22 01:38:55,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:38:55,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-22 01:38:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:38:55,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:38:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292589348] [2022-11-22 01:38:55,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292589348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:38:55,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [357664851] [2022-11-22 01:38:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:55,185 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:38:55,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:38:55,188 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:38:55,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-22 01:38:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:55,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 01:38:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:55,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-22 01:38:55,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:38:56,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:56,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-22 01:38:56,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-22 01:38:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:56,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:38:56,687 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_662 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_662) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))))) is different from false [2022-11-22 01:38:57,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:38:57,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 414 treesize of output 177 [2022-11-22 01:38:57,706 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-22 01:38:57,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 466 treesize of output 409 [2022-11-22 01:38:57,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:38:57,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:38:57,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 177 [2022-11-22 01:38:57,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:38:57,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 142 [2022-11-22 01:39:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:01,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [357664851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:39:01,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732160756] [2022-11-22 01:39:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:01,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:01,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:01,950 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:01,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 01:39:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:02,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:39:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:02,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-22 01:39:02,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-22 01:39:02,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:39:02,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-22 01:39:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:02,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:39:03,690 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-22 01:39:03,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-22 01:39:03,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:39:03,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-22 01:39:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:04,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732160756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:39:04,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:39:04,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 28 [2022-11-22 01:39:04,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21167124] [2022-11-22 01:39:04,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:39:04,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 01:39:04,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:39:04,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 01:39:04,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=631, Unknown=2, NotChecked=106, Total=870 [2022-11-22 01:39:04,632 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:26,249 WARN L233 SmtUtils]: Spent 20.61s on a formula simplification. DAG size of input: 134 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:39:28,321 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 [] [2022-11-22 01:39:30,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:39:32,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:39:34,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:39:41,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:39:43,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:39:46,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:39:52,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:39:54,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:39:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:55,178 INFO L93 Difference]: Finished difference Result 114 states and 239 transitions. [2022-11-22 01:39:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:39:55,179 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 01:39:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:55,180 INFO L225 Difference]: With dead ends: 114 [2022-11-22 01:39:55,180 INFO L226 Difference]: Without dead ends: 93 [2022-11-22 01:39:55,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=259, Invalid=1004, Unknown=5, NotChecked=138, Total=1406 [2022-11-22 01:39:55,182 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 198 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 39 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:55,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 0 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 346 Invalid, 14 Unknown, 79 Unchecked, 20.6s Time] [2022-11-22 01:39:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-22 01:39:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2022-11-22 01:39:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2022-11-22 01:39:55,187 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 15 [2022-11-22 01:39:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:55,187 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2022-11-22 01:39:55,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2022-11-22 01:39:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:39:55,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:55,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:55,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:55,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-22 01:39:55,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:55,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:39:55,790 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:39:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:55,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2082722451, now seen corresponding path program 2 times [2022-11-22 01:39:55,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:39:55,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892383541] [2022-11-22 01:39:55,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:39:55,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:39:55,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:39:55,792 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:39:55,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:39:55,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:39:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:39:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:39:55,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:56,085 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:39:56,085 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:39:56,217 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 15 treesize of output 11 [2022-11-22 01:39:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:56,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:39:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:57,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:39:57,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892383541] [2022-11-22 01:39:57,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892383541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:39:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [258763116] [2022-11-22 01:39:57,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:39:57,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:39:57,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:39:57,864 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:39:57,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-22 01:39:58,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:39:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978365205] [2022-11-22 01:39:58,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:39:58,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:58,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 1 [2022-11-22 01:39:58,180 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:58,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-22 01:39:58,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:39:58,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:39:58,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:39:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:59,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:00,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978365205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:00,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 01:40:00,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 20 [2022-11-22 01:40:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99907227] [2022-11-22 01:40:00,778 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:00,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:40:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:40:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:40:00,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:40:00,780 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2022-11-22 01:40:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:40:04,330 INFO L93 Difference]: Finished difference Result 226 states and 445 transitions. [2022-11-22 01:40:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:40:04,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 17 [2022-11-22 01:40:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:40:04,333 INFO L225 Difference]: With dead ends: 226 [2022-11-22 01:40:04,333 INFO L226 Difference]: Without dead ends: 196 [2022-11-22 01:40:04,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:40:04,335 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 197 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:40:04,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 0 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 01:40:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-22 01:40:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 132. [2022-11-22 01:40:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 2.276923076923077) internal successors, (296), 131 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 296 transitions. [2022-11-22 01:40:04,344 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 296 transitions. Word has length 17 [2022-11-22 01:40:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:40:04,344 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 296 transitions. [2022-11-22 01:40:04,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2022-11-22 01:40:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 296 transitions. [2022-11-22 01:40:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:40:04,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:40:04,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:40:04,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:40:04,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-22 01:40:04,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:04,759 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:40:04,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:40:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash 170081567, now seen corresponding path program 3 times [2022-11-22 01:40:04,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:40:04,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62078837] [2022-11-22 01:40:04,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:40:04,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:40:04,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:40:04,762 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:40:04,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:40:05,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:40:05,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:40:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:40:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:05,072 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 [2022-11-22 01:40:05,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-22 01:40:05,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:05,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-22 01:40:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:40:05,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:05,872 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-22 01:40:05,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 81 [2022-11-22 01:40:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:40:06,302 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:40:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62078837] [2022-11-22 01:40:06,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62078837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143842417] [2022-11-22 01:40:06,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:40:06,303 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:40:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:40:06,307 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:40:06,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-22 01:40:06,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:40:06,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266778943] [2022-11-22 01:40:06,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:40:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:40:06,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:40:06,667 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:40:06,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 1 [2022-11-22 01:40:06,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-22 01:40:06,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:40:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:40:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 01:40:06,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:40:06,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-22 01:40:07,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-22 01:40:08,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:08,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-22 01:40:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:08,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:40:09,483 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-22 01:40:09,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-22 01:40:09,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:40:09,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-22 01:40:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:40:11,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266778943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:40:11,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 01:40:11,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9] total 27 [2022-11-22 01:40:11,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478631113] [2022-11-22 01:40:11,388 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 01:40:11,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 01:40:11,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:40:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 01:40:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-11-22 01:40:11,390 INFO L87 Difference]: Start difference. First operand 132 states and 296 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:40:14,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:16,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:19,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:40:22,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:24,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:27,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:29,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:36,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:38,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:41,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:44,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:46,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:40:53,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:55,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:40:57,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:41:00,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:41:03,297 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 [] [2022-11-22 01:41:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:05,100 INFO L93 Difference]: Finished difference Result 640 states and 1431 transitions. [2022-11-22 01:41:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-22 01:41:05,102 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 01:41:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:05,105 INFO L225 Difference]: With dead ends: 640 [2022-11-22 01:41:05,105 INFO L226 Difference]: Without dead ends: 542 [2022-11-22 01:41:05,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=568, Invalid=2734, Unknown=4, NotChecked=0, Total=3306 [2022-11-22 01:41:05,107 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 644 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 135 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:05,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 0 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1280 Invalid, 20 Unknown, 0 Unchecked, 41.6s Time] [2022-11-22 01:41:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-22 01:41:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 240. [2022-11-22 01:41:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 238 states have (on average 2.7563025210084033) internal successors, (656), 239 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 656 transitions. [2022-11-22 01:41:05,123 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 656 transitions. Word has length 18 [2022-11-22 01:41:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:05,124 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 656 transitions. [2022-11-22 01:41:05,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 656 transitions. [2022-11-22 01:41:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:41:05,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:05,127 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:05,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:05,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:41:05,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:41:05,536 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:41:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1462837482, now seen corresponding path program 4 times [2022-11-22 01:41:05,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:41:05,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167271107] [2022-11-22 01:41:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:41:05,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:41:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:41:05,538 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:41:05,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:41:05,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:41:05,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:41:05,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:41:05,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:05,838 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:41:05,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:41:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:41:06,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:41:06,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:41:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167271107] [2022-11-22 01:41:06,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167271107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2094698143] [2022-11-22 01:41:06,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:41:06,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:41:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:41:06,490 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:41:06,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-22 01:41:06,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:41:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:41:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:41:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:41:07,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:41:07,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2094698143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:07,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702500908] [2022-11-22 01:41:07,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:41:07,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:07,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:07,578 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:07,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-22 01:41:07,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:41:07,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:41:07,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:41:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:41:07,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:41:08,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702500908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:08,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:41:08,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 21 [2022-11-22 01:41:08,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935588611] [2022-11-22 01:41:08,159 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:41:08,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:41:08,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:41:08,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:41:08,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:41:08,161 INFO L87 Difference]: Start difference. First operand 240 states and 656 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:41:09,858 INFO L93 Difference]: Finished difference Result 202 states and 517 transitions. [2022-11-22 01:41:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:41:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 01:41:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:41:09,861 INFO L225 Difference]: With dead ends: 202 [2022-11-22 01:41:09,861 INFO L226 Difference]: Without dead ends: 191 [2022-11-22 01:41:09,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:41:09,862 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:41:09,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:41:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-22 01:41:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-22 01:41:09,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 2.6560846560846563) internal successors, (502), 190 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 502 transitions. [2022-11-22 01:41:09,873 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 502 transitions. Word has length 18 [2022-11-22 01:41:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:41:09,874 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 502 transitions. [2022-11-22 01:41:09,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:41:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 502 transitions. [2022-11-22 01:41:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:41:09,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:41:09,876 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:41:09,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:41:10,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:10,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-22 01:41:10,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:10,492 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:41:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:41:10,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1176106403, now seen corresponding path program 5 times [2022-11-22 01:41:10,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:41:10,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100924465] [2022-11-22 01:41:10,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:41:10,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:41:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:41:10,494 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:41:10,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:41:10,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-22 01:41:10,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:41:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:41:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:11,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:41:11,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-22 01:41:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:41:11,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:11,264 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-11-22 01:41:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2022-11-22 01:41:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:41:11,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:41:11,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100924465] [2022-11-22 01:41:11,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100924465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1373922275] [2022-11-22 01:41:11,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:41:11,389 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:41:11,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:41:11,390 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:41:11,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-22 01:41:15,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-22 01:41:15,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:41:15,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-22 01:41:15,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:16,028 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:41:16,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:41:16,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-22 01:41:16,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-22 01:41:16,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:41:17,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:41:17,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-22 01:41:18,033 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 14 [2022-11-22 01:41:18,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 28 [2022-11-22 01:41:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:18,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:41:34,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:41:34,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 1013 treesize of output 300 [2022-11-22 01:41:34,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,488 WARN L233 SmtUtils]: Spent 8.35s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 01:41:42,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:41:42,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 58 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 8 case distinctions, treesize of input 468 treesize of output 465 [2022-11-22 01:41:42,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:42,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:50,978 WARN L233 SmtUtils]: Spent 8.42s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 01:41:50,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:41:50,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 304 treesize of output 240 [2022-11-22 01:41:51,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:41:51,371 INFO L321 Elim1Store]: treesize reduction 41, result has 61.0 percent of original size [2022-11-22 01:41:51,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 58 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 8 case distinctions, treesize of input 216 treesize of output 196 [2022-11-22 01:41:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:41:56,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1373922275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:41:56,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082836218] [2022-11-22 01:41:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:41:56,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:41:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:41:56,506 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:41:56,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-22 01:41:57,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-22 01:41:57,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:41:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-22 01:41:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:41:57,294 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:41:57,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:42:03,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-22 01:42:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:03,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:03,769 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-22 01:42:03,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 27 [2022-11-22 01:42:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:07,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082836218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:42:07,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:42:07,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 10, 10, 9, 9] total 41 [2022-11-22 01:42:07,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877986596] [2022-11-22 01:42:07,753 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:42:07,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 01:42:07,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:42:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 01:42:07,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1409, Unknown=11, NotChecked=0, Total=1806 [2022-11-22 01:42:07,756 INFO L87 Difference]: Start difference. First operand 191 states and 502 transitions. Second operand has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:27,145 WARN L233 SmtUtils]: Spent 11.16s on a formula simplification. DAG size of input: 258 DAG size of output: 247 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:31,287 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 [] [2022-11-22 01:42:33,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:43:16,044 WARN L233 SmtUtils]: Spent 40.27s on a formula simplification. DAG size of input: 88 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:43:20,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:43:24,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:43:26,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:43:34,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:43:37,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:44:25,907 WARN L233 SmtUtils]: Spent 44.25s on a formula simplification. DAG size of input: 70 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:44:28,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:44:33,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:44:37,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:44:39,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:44:41,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:44:45,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:44:48,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:45:14,203 WARN L233 SmtUtils]: Spent 20.11s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:46:21,392 WARN L233 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 205 DAG size of output: 186 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:46:25,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:46:27,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:46:29,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:46:31,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:46:47,229 WARN L233 SmtUtils]: Spent 11.81s on a formula simplification. DAG size of input: 267 DAG size of output: 256 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:46:52,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:46:56,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:46:58,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:47:01,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:47:05,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:47:08,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:47:11,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:47:14,467 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 [1] [2022-11-22 01:47:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:15,708 INFO L93 Difference]: Finished difference Result 801 states and 1877 transitions. [2022-11-22 01:47:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-22 01:47:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 01:47:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:15,714 INFO L225 Difference]: With dead ends: 801 [2022-11-22 01:47:15,714 INFO L226 Difference]: Without dead ends: 643 [2022-11-22 01:47:15,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 257.6s TimeCoverageRelationStatistics Valid=1173, Invalid=4656, Unknown=23, NotChecked=0, Total=5852 [2022-11-22 01:47:15,717 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 570 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 212 mSolverCounterUnsat, 59 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 59 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:15,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 0 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1619 Invalid, 59 Unknown, 0 Unchecked, 75.2s Time] [2022-11-22 01:47:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-11-22 01:47:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 216. [2022-11-22 01:47:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 214 states have (on average 2.6401869158878504) internal successors, (565), 215 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:47:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 565 transitions. [2022-11-22 01:47:15,740 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 565 transitions. Word has length 19 [2022-11-22 01:47:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:15,741 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 565 transitions. [2022-11-22 01:47:15,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:47:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 565 transitions. [2022-11-22 01:47:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:47:15,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:15,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:15,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:15,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:47:16,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-22 01:47:16,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:16,350 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:47:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:16,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1201274390, now seen corresponding path program 6 times [2022-11-22 01:47:16,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:47:16,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641228335] [2022-11-22 01:47:16,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-22 01:47:16,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:47:16,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:47:16,352 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:47:16,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:47:16,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-22 01:47:16,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:16,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:47:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:16,677 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:47:16,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-22 01:47:16,873 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 15 treesize of output 11 [2022-11-22 01:47:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:17,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:20,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:47:20,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641228335] [2022-11-22 01:47:20,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641228335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:20,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [946164009] [2022-11-22 01:47:20,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-22 01:47:20,283 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:47:20,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:47:20,287 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:47:20,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-22 01:47:20,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:20,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548484886] [2022-11-22 01:47:20,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-22 01:47:20,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:20,657 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:20,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 1 [2022-11-22 01:47:20,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-22 01:47:20,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-22 01:47:20,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:20,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 01:47:20,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:22,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:25,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548484886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:25,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 01:47:25,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 35 [2022-11-22 01:47:25,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668927816] [2022-11-22 01:47:25,761 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:25,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 01:47:25,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:47:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 01:47:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:47:25,763 INFO L87 Difference]: Start difference. First operand 216 states and 565 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:47:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:39,223 INFO L93 Difference]: Finished difference Result 730 states and 1768 transitions. [2022-11-22 01:47:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:47:39,225 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-22 01:47:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:39,229 INFO L225 Difference]: With dead ends: 730 [2022-11-22 01:47:39,229 INFO L226 Difference]: Without dead ends: 634 [2022-11-22 01:47:39,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=597, Invalid=1383, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 01:47:39,231 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 293 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:39,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 0 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-22 01:47:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-22 01:47:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 404. [2022-11-22 01:47:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 402 states have (on average 2.7587064676616917) internal successors, (1109), 403 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:47:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1109 transitions. [2022-11-22 01:47:39,249 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1109 transitions. Word has length 20 [2022-11-22 01:47:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:39,250 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 1109 transitions. [2022-11-22 01:47:39,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:47:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1109 transitions. [2022-11-22 01:47:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:47:39,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:39,252 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:39,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:47:39,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:39,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:39,665 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:47:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash -218231802, now seen corresponding path program 7 times [2022-11-22 01:47:39,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:47:39,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122371232] [2022-11-22 01:47:39,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:47:39,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:47:39,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:47:39,668 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:47:39,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:47:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:47:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:40,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:40,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-22 01:47:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:47:40,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:40,244 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-11-22 01:47:40,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2022-11-22 01:47:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:47:40,445 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:47:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122371232] [2022-11-22 01:47:40,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122371232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [818557126] [2022-11-22 01:47:40,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:47:40,446 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:47:40,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:47:40,447 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:47:40,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-22 01:47:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:40,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:47:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:47:41,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:47:42,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [818557126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:42,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057289722] [2022-11-22 01:47:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:47:42,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:42,654 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:42,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-22 01:47:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:47:42,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:47:43,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:47:46,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057289722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:46,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:47:46,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 8, 8] total 35 [2022-11-22 01:47:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959812829] [2022-11-22 01:47:46,481 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:46,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 01:47:46,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:47:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 01:47:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:47:46,483 INFO L87 Difference]: Start difference. First operand 404 states and 1109 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:09,239 INFO L93 Difference]: Finished difference Result 678 states and 1623 transitions. [2022-11-22 01:48:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 01:48:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-22 01:48:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:09,242 INFO L225 Difference]: With dead ends: 678 [2022-11-22 01:48:09,242 INFO L226 Difference]: Without dead ends: 578 [2022-11-22 01:48:09,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=669, Invalid=3237, Unknown=0, NotChecked=0, Total=3906 [2022-11-22 01:48:09,244 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:09,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 0 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-11-22 01:48:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-22 01:48:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 283. [2022-11-22 01:48:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 2.7402135231316724) internal successors, (770), 282 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 770 transitions. [2022-11-22 01:48:09,258 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 770 transitions. Word has length 20 [2022-11-22 01:48:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:09,259 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 770 transitions. [2022-11-22 01:48:09,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 770 transitions. [2022-11-22 01:48:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:48:09,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:09,261 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:09,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-22 01:48:09,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-22 01:48:09,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:48:09,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:48:09,875 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-22 01:48:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1841776596, now seen corresponding path program 8 times [2022-11-22 01:48:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:48:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256987438] [2022-11-22 01:48:09,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:48:09,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:48:09,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:48:09,877 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:48:09,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:48:10,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:48:10,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:48:10,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:48:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:48:10,208 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 [2022-11-22 01:48:10,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-22 01:48:10,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:48:10,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-22 01:48:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:48:10,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:48:11,033 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1300 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1300) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv11 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv10 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv9 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv8 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-22 01:48:11,322 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-22 01:48:11,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-22 01:48:11,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:48:11,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-22 01:48:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:48:11,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:48:11,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256987438] [2022-11-22 01:48:11,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256987438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:48:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888343146] [2022-11-22 01:48:11,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:48:11,895 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:48:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:48:11,896 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:48:11,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-22 01:48:12,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:48:12,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526363229] [2022-11-22 01:48:12,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:48:12,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:48:12,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:48:12,284 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:48:12,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 1 [2022-11-22 01:48:12,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4497f635-f7a4-4aa9-8e72-dc5e3ce215af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-22 01:48:12,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:48:12,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:48:12,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-22 01:48:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:48:12,514 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 [2022-11-22 01:48:12,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-22 01:48:13,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 01:48:13,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-22 01:48:15,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:48:15,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-22 01:48:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:48:15,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:48:27,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:48:27,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 179 [2022-11-22 01:48:27,861 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-22 01:48:27,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 256 [2022-11-22 01:48:27,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 94 [2022-11-22 01:48:28,264 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-22 01:48:28,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 111 [2022-11-22 01:48:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:48:33,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526363229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:48:33,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 01:48:33,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12] total 37 [2022-11-22 01:48:33,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319958459] [2022-11-22 01:48:33,222 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 01:48:33,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 01:48:33,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:48:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 01:48:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1207, Unknown=6, NotChecked=72, Total=1482 [2022-11-22 01:48:33,223 INFO L87 Difference]: Start difference. First operand 283 states and 770 transitions. Second operand has 39 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:48:37,464 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 [0] [2022-11-22 01:48:40,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:49:26,888 WARN L233 SmtUtils]: Spent 46.34s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:49:29,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:50:13,993 WARN L233 SmtUtils]: Spent 44.23s on a formula simplification. DAG size of input: 81 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:50:18,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:50:20,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:50:28,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-22 01:50:30,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:32,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:45,321 WARN L233 SmtUtils]: Spent 1.21m on a formula simplification. DAG size of input: 72 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:51:49,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:51:51,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:53,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:55,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:51:57,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 01:51:59,102 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 [1]