./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh --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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --- 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-2329fc7 [2022-12-14 13:26:07,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:26:07,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:26:07,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:26:07,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:26:07,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:26:07,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:26:07,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:26:07,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:26:07,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:26:07,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:26:07,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:26:07,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:26:07,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:26:07,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:26:07,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:26:07,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:26:07,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:26:07,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:26:07,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:26:07,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:26:07,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:26:07,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:26:07,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:26:07,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:26:07,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:26:07,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:26:07,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:26:07,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:26:07,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:26:07,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:26:07,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:26:07,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:26:07,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:26:07,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:26:07,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:26:07,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:26:07,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:26:07,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:26:07,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:26:07,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:26:07,408 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:26:07,430 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:26:07,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:26:07,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:26:07,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:26:07,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:26:07,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:26:07,432 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:26:07,432 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:26:07,432 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:26:07,432 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:26:07,432 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:26:07,433 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:26:07,433 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:26:07,433 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:26:07,433 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:26:07,433 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:26:07,434 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:26:07,434 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:26:07,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:26:07,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:26:07,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:26:07,435 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:26:07,435 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:26:07,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:26:07,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:26:07,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:26:07,435 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:26:07,436 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:26:07,436 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:26:07,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:26:07,436 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:26:07,436 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:26:07,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:26:07,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:26:07,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:26:07,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:26:07,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:26:07,437 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:26:07,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:26:07,437 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:26:07,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:26:07,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:26:07,438 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_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 [2022-12-14 13:26:07,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:26:07,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:26:07,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:26:07,642 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:26:07,642 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:26:07,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-14 13:26:10,255 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:26:10,423 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:26:10,423 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-14 13:26:10,428 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/data/8030afe94/26e87f489109403baf017504ca82b162/FLAG652782abd [2022-12-14 13:26:10,439 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/data/8030afe94/26e87f489109403baf017504ca82b162 [2022-12-14 13:26:10,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:26:10,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:26:10,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:26:10,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:26:10,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:26:10,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:26:10" (1/1) ... [2022-12-14 13:26:10,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df19d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:10, skipping insertion in model container [2022-12-14 13:26:10,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:26:10" (1/1) ... [2022-12-14 13:26:10,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:26:10,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:26:10,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:10,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:10,583 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:10,584 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:10,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:10,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:10,591 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_6986f2db-f6fd-4358-aac0-02dc305a76c6/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-14 13:26:10,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:26:10,606 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) [2022-12-14 13:26:10,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b12e485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:10, skipping insertion in model container [2022-12-14 13:26:10,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:26:10,607 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 13:26:10,609 INFO L158 Benchmark]: Toolchain (without parser) took 166.48ms. Allocated memory is still 138.4MB. Free memory was 103.4MB in the beginning and 93.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:26:10,609 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 138.4MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:26:10,609 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.70ms. Allocated memory is still 138.4MB. Free memory was 102.9MB in the beginning and 93.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:26:10,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 138.4MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.70ms. Allocated memory is still 138.4MB. Free memory was 102.9MB in the beginning and 93.0MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh --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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --- 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-2329fc7 [2022-12-14 13:26:12,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:26:12,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:26:12,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:26:12,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:26:12,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:26:12,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:26:12,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:26:12,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:26:12,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:26:12,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:26:12,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:26:12,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:26:12,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:26:12,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:26:12,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:26:12,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:26:12,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:26:12,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:26:12,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:26:12,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:26:12,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:26:12,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:26:12,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:26:12,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:26:12,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:26:12,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:26:12,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:26:12,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:26:12,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:26:12,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:26:12,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:26:12,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:26:12,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:26:12,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:26:12,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:26:12,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:26:12,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:26:12,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:26:12,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:26:12,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:26:12,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 13:26:12,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:26:12,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:26:12,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:26:12,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:26:12,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:26:12,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:26:12,071 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:26:12,071 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:26:12,071 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:26:12,071 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:26:12,071 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:26:12,071 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:26:12,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:26:12,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:26:12,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:26:12,072 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:26:12,072 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:26:12,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:26:12,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:26:12,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:26:12,072 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:26:12,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 13:26:12,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:26:12,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:26:12,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:26:12,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:26:12,074 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 13:26:12,074 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 13:26:12,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:26:12,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 13:26:12,074 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_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 [2022-12-14 13:26:12,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:26:12,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:26:12,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:26:12,303 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:26:12,303 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:26:12,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-14 13:26:14,863 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:26:15,010 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:26:15,010 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-14 13:26:15,015 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/data/841f8046f/3006184c57454bbb8852464058bee769/FLAG4f51a9bda [2022-12-14 13:26:15,025 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/data/841f8046f/3006184c57454bbb8852464058bee769 [2022-12-14 13:26:15,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:26:15,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:26:15,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:26:15,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:26:15,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:26:15,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4ba703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15, skipping insertion in model container [2022-12-14 13:26:15,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:26:15,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:26:15,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,188 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,189 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,196 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_6986f2db-f6fd-4358-aac0-02dc305a76c6/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-14 13:26:15,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:26:15,219 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 13:26:15,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:26:15,228 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,229 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,230 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,230 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,231 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,232 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,234 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_6986f2db-f6fd-4358-aac0-02dc305a76c6/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-14 13:26:15,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:26:15,240 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:26:15,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,251 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,253 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:26:15,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:26:15,257 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_6986f2db-f6fd-4358-aac0-02dc305a76c6/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-14 13:26:15,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:26:15,270 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:26:15,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15 WrapperNode [2022-12-14 13:26:15,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:26:15,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:26:15,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:26:15,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:26:15,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,301 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-12-14 13:26:15,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:26:15,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:26:15,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:26:15,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:26:15,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,325 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:26:15,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:26:15,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:26:15,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:26:15,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (1/1) ... [2022-12-14 13:26:15,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:26:15,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:15,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:26:15,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:26:15,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:26:15,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 13:26:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:26:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 13:26:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 13:26:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 13:26:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 13:26:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 13:26:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 13:26:15,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 13:26:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 13:26:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 13:26:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:26:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:26:15,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:26:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:26:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 13:26:15,407 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 13:26:15,530 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:26:15,532 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:26:15,984 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:26:16,073 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:26:16,074 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 13:26:16,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:26:16 BoogieIcfgContainer [2022-12-14 13:26:16,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:26:16,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:26:16,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:26:16,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:26:16,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:26:15" (1/3) ... [2022-12-14 13:26:16,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cd4f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:26:16, skipping insertion in model container [2022-12-14 13:26:16,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:26:15" (2/3) ... [2022-12-14 13:26:16,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cd4f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:26:16, skipping insertion in model container [2022-12-14 13:26:16,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:26:16" (3/3) ... [2022-12-14 13:26:16,089 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2022-12-14 13:26:16,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:26:16,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-14 13:26:16,103 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 13:26:16,155 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 13:26:16,180 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:26:16,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 180 transitions, 384 flow [2022-12-14 13:26:16,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 180 transitions, 384 flow [2022-12-14 13:26:16,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-12-14 13:26:16,238 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-12-14 13:26:16,238 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 13:26:16,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 12/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-12-14 13:26:16,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-14 13:26:37,159 INFO L134 LiptonReduction]: Checked pairs total: 3860 [2022-12-14 13:26:37,159 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-12-14 13:26:37,165 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-12-14 13:26:37,247 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:37,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:26:37,266 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;@747e05ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:26:37,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-14 13:26:37,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:26:37,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:37,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:26:37,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:37,280 INFO L85 PathProgramCache]: Analyzing trace with hash 23516, now seen corresponding path program 1 times [2022-12-14 13:26:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:37,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24625360] [2022-12-14 13:26:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:37,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:37,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:37,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:26:37,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:37,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:26:37,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:37,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24625360] [2022-12-14 13:26:37,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24625360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:26:37,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:26:37,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:26:37,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609796582] [2022-12-14 13:26:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:26:37,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:26:37,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:26:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:26:37,441 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 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) [2022-12-14 13:26:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:37,660 INFO L93 Difference]: Finished difference Result 752 states and 2568 transitions. [2022-12-14 13:26:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:26:37,662 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 [2022-12-14 13:26:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:37,675 INFO L225 Difference]: With dead ends: 752 [2022-12-14 13:26:37,675 INFO L226 Difference]: Without dead ends: 752 [2022-12-14 13:26:37,676 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 [2022-12-14 13:26:37,678 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:37,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:26:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-12-14 13:26:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2022-12-14 13:26:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 749 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2568 transitions. [2022-12-14 13:26:37,757 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2568 transitions. Word has length 2 [2022-12-14 13:26:37,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:37,757 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2568 transitions. [2022-12-14 13:26:37,757 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) [2022-12-14 13:26:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2568 transitions. [2022-12-14 13:26:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:26:37,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:37,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:26:37,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:37,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:37,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 23357, now seen corresponding path program 1 times [2022-12-14 13:26:37,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:37,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118974741] [2022-12-14 13:26:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:37,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:37,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:37,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:38,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:26:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:38,235 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 13:26:38,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 13:26:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:38,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:26:38,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:38,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118974741] [2022-12-14 13:26:38,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118974741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:26:38,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:26:38,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:26:38,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920352015] [2022-12-14 13:26:38,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:26:38,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:26:38,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:38,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:26:38,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:26:38,257 INFO L87 Difference]: Start difference. First operand 750 states and 2568 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) [2022-12-14 13:26:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:38,401 INFO L93 Difference]: Finished difference Result 749 states and 2566 transitions. [2022-12-14 13:26:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:26:38,401 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 [2022-12-14 13:26:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:38,404 INFO L225 Difference]: With dead ends: 749 [2022-12-14 13:26:38,404 INFO L226 Difference]: Without dead ends: 749 [2022-12-14 13:26:38,405 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 [2022-12-14 13:26:38,406 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:38,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:26:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-12-14 13:26:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-12-14 13:26:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.158833063209076) internal successors, (2566), 748 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-12-14 13:26:38,437 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-12-14 13:26:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:38,437 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-12-14 13:26:38,437 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) [2022-12-14 13:26:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-12-14 13:26:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:26:38,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:38,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:26:38,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:38,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:38,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:38,641 INFO L85 PathProgramCache]: Analyzing trace with hash 23358, now seen corresponding path program 1 times [2022-12-14 13:26:38,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:38,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432224823] [2022-12-14 13:26:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:38,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:38,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:38,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:38,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:38,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:26:38,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:38,906 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:38,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:38,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:26:38,937 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432224823] [2022-12-14 13:26:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432224823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:26:38,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:26:38,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:26:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296155766] [2022-12-14 13:26:38,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:26:38,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:26:38,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:26:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:26:38,939 INFO L87 Difference]: Start difference. First operand 749 states and 2566 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) [2022-12-14 13:26:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:39,148 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-12-14 13:26:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:26:39,149 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 [2022-12-14 13:26:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:39,153 INFO L225 Difference]: With dead ends: 749 [2022-12-14 13:26:39,153 INFO L226 Difference]: Without dead ends: 749 [2022-12-14 13:26:39,153 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 [2022-12-14 13:26:39,154 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:39,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:26:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-12-14 13:26:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-12-14 13:26:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-12-14 13:26:39,170 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-12-14 13:26:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:39,171 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-12-14 13:26:39,171 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) [2022-12-14 13:26:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-12-14 13:26:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:26:39,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:39,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:26:39,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 13:26:39,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:39,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash 728797, now seen corresponding path program 1 times [2022-12-14 13:26:39,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:39,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589766024] [2022-12-14 13:26:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:39,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:39,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:39,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:39,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:26:39,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:39,510 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-12-14 13:26:39,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-12-14 13:26:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:26:39,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:26:39,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:39,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589766024] [2022-12-14 13:26:39,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589766024] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:26:39,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:26:39,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:26:39,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822634396] [2022-12-14 13:26:39,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:26:39,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:26:39,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:26:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:26:39,587 INFO L87 Difference]: Start difference. First operand 749 states and 2565 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:39,803 INFO L93 Difference]: Finished difference Result 623 states and 2064 transitions. [2022-12-14 13:26:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:26:39,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:26:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:39,808 INFO L225 Difference]: With dead ends: 623 [2022-12-14 13:26:39,808 INFO L226 Difference]: Without dead ends: 623 [2022-12-14 13:26:39,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:26:39,810 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:39,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:26:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-12-14 13:26:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2022-12-14 13:26:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 519 states have (on average 3.976878612716763) internal successors, (2064), 622 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2064 transitions. [2022-12-14 13:26:39,831 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2064 transitions. Word has length 3 [2022-12-14 13:26:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:39,831 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 2064 transitions. [2022-12-14 13:26:39,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2064 transitions. [2022-12-14 13:26:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:26:39,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:39,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:26:39,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:26:40,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:40,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:40,033 INFO L85 PathProgramCache]: Analyzing trace with hash 728798, now seen corresponding path program 1 times [2022-12-14 13:26:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:40,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351354601] [2022-12-14 13:26:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:40,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:40,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:40,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:40,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:40,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:26:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:40,220 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 13:26:40,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-12-14 13:26:40,246 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 13:26:40,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 13:26:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:40,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:40,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:40,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351354601] [2022-12-14 13:26:40,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351354601] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:26:40,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:26:40,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-12-14 13:26:40,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414059247] [2022-12-14 13:26:40,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:26:40,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:26:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:26:40,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:26:40,426 INFO L87 Difference]: Start difference. First operand 623 states and 2064 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:40,582 INFO L93 Difference]: Finished difference Result 497 states and 1563 transitions. [2022-12-14 13:26:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:26:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:26:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:40,588 INFO L225 Difference]: With dead ends: 497 [2022-12-14 13:26:40,588 INFO L226 Difference]: Without dead ends: 497 [2022-12-14 13:26:40,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:26:40,589 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:40,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:26:40,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-12-14 13:26:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-12-14 13:26:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 421 states have (on average 3.7125890736342044) internal successors, (1563), 496 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1563 transitions. [2022-12-14 13:26:40,605 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1563 transitions. Word has length 3 [2022-12-14 13:26:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:40,606 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1563 transitions. [2022-12-14 13:26:40,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1563 transitions. [2022-12-14 13:26:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:26:40,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:40,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:26:40,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:26:40,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:40,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash 728639, now seen corresponding path program 1 times [2022-12-14 13:26:40,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:40,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694192003] [2022-12-14 13:26:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:40,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:40,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:40,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:40,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 13:26:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:40,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:26:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:41,014 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:41,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:41,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:41,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694192003] [2022-12-14 13:26:41,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694192003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1481196957] [2022-12-14 13:26:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:41,247 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:26:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:26:41,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:26:41,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 13:26:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:41,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:26:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:41,424 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:41,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:41,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:41,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1481196957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64810983] [2022-12-14 13:26:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:41,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:41,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:41,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:26:41,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:26:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:41,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:26:41,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:41,643 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:41,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:41,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:41,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64810983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:41,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:26:41,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 13:26:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007005127] [2022-12-14 13:26:41,797 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:26:41,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:26:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:26:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:26:41,798 INFO L87 Difference]: Start difference. First operand 497 states and 1563 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) [2022-12-14 13:26:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:43,043 INFO L93 Difference]: Finished difference Result 1486 states and 4685 transitions. [2022-12-14 13:26:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:26:43,045 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 [2022-12-14 13:26:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:43,050 INFO L225 Difference]: With dead ends: 1486 [2022-12-14 13:26:43,050 INFO L226 Difference]: Without dead ends: 1486 [2022-12-14 13:26:43,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:26:43,051 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 215 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:43,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 15 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 13:26:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-12-14 13:26:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 500. [2022-12-14 13:26:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.7004716981132075) internal successors, (1569), 499 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1569 transitions. [2022-12-14 13:26:43,069 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1569 transitions. Word has length 3 [2022-12-14 13:26:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:43,070 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1569 transitions. [2022-12-14 13:26:43,070 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) [2022-12-14 13:26:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1569 transitions. [2022-12-14 13:26:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:26:43,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:43,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:26:43,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 13:26:43,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:26:43,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 13:26:43,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:43,673 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:43,674 INFO L85 PathProgramCache]: Analyzing trace with hash 700389652, now seen corresponding path program 1 times [2022-12-14 13:26:43,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:43,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48111499] [2022-12-14 13:26:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:43,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:43,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:43,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:43,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:43,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:26:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:43,811 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 13:26:43,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 13:26:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:26:43,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:26:43,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:43,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48111499] [2022-12-14 13:26:43,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48111499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:26:43,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:26:43,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:26:43,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498686943] [2022-12-14 13:26:43,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:26:43,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:26:43,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:26:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:26:43,893 INFO L87 Difference]: Start difference. First operand 500 states and 1569 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:44,026 INFO L93 Difference]: Finished difference Result 470 states and 1484 transitions. [2022-12-14 13:26:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:26:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:26:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:44,029 INFO L225 Difference]: With dead ends: 470 [2022-12-14 13:26:44,029 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 13:26:44,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:26:44,030 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:44,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:26:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 13:26:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-12-14 13:26:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6551724137931036) internal successors, (1484), 469 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1484 transitions. [2022-12-14 13:26:44,043 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1484 transitions. Word has length 5 [2022-12-14 13:26:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:44,043 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1484 transitions. [2022-12-14 13:26:44,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1484 transitions. [2022-12-14 13:26:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:26:44,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:44,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:26:44,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 13:26:44,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:44,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash 700389653, now seen corresponding path program 1 times [2022-12-14 13:26:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:44,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188253808] [2022-12-14 13:26:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:44,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:44,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:26:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:44,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:44,495 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 13:26:44,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-14 13:26:44,506 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 [2022-12-14 13:26:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:44,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:44,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:44,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188253808] [2022-12-14 13:26:44,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188253808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:44,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972151520] [2022-12-14 13:26:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:44,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:26:44,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:26:44,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:26:44,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 13:26:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:44,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:26:44,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:45,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:45,073 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 13:26:45,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-14 13:26:45,083 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 [2022-12-14 13:26:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:26:45,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:26:45,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1972151520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:26:45,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:26:45,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 13:26:45,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942346928] [2022-12-14 13:26:45,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:26:45,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:26:45,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:26:45,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:26:45,172 INFO L87 Difference]: Start difference. First operand 470 states and 1484 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:45,304 INFO L93 Difference]: Finished difference Result 440 states and 1399 transitions. [2022-12-14 13:26:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:26:45,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:26:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:45,307 INFO L225 Difference]: With dead ends: 440 [2022-12-14 13:26:45,307 INFO L226 Difference]: Without dead ends: 440 [2022-12-14 13:26:45,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:26:45,307 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:45,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:26:45,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-12-14 13:26:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-12-14 13:26:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6056701030927836) internal successors, (1399), 439 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1399 transitions. [2022-12-14 13:26:45,314 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1399 transitions. Word has length 5 [2022-12-14 13:26:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:45,314 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1399 transitions. [2022-12-14 13:26:45,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1399 transitions. [2022-12-14 13:26:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:26:45,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:45,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:26:45,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 13:26:45,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 13:26:45,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:45,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:45,718 INFO L85 PathProgramCache]: Analyzing trace with hash 237237211, now seen corresponding path program 1 times [2022-12-14 13:26:45,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:45,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996750509] [2022-12-14 13:26:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:45,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:45,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:45,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:45,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:26:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:45,852 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 13:26:45,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 13:26:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:26:45,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:26:45,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:45,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996750509] [2022-12-14 13:26:45,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996750509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:26:45,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:26:45,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:26:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351091802] [2022-12-14 13:26:45,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:26:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:26:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:26:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:26:45,866 INFO L87 Difference]: Start difference. First operand 440 states and 1399 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:45,985 INFO L93 Difference]: Finished difference Result 258 states and 798 transitions. [2022-12-14 13:26:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:26:45,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:26:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:45,987 INFO L225 Difference]: With dead ends: 258 [2022-12-14 13:26:45,987 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 13:26:45,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:26:45,987 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:45,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:26:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 13:26:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-12-14 13:26:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 237 states have (on average 3.367088607594937) internal successors, (798), 257 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 798 transitions. [2022-12-14 13:26:45,991 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 798 transitions. Word has length 6 [2022-12-14 13:26:45,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:45,992 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 798 transitions. [2022-12-14 13:26:45,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 798 transitions. [2022-12-14 13:26:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:26:45,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:45,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:26:45,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:46,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:46,194 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:46,195 INFO L85 PathProgramCache]: Analyzing trace with hash 237237212, now seen corresponding path program 1 times [2022-12-14 13:26:46,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:46,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660625568] [2022-12-14 13:26:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:46,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:46,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:46,199 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:46,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 13:26:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:26:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:46,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:46,529 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 25 treesize of output 21 [2022-12-14 13:26:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:46,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:46,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660625568] [2022-12-14 13:26:46,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660625568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:46,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [47962624] [2022-12-14 13:26:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:46,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:26:46,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:26:46,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:26:46,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 13:26:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:26:46,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:46,768 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:46,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:46,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:47,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [47962624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:47,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073203803] [2022-12-14 13:26:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:47,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:47,247 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:26:47,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:26:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:26:47,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:47,403 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:47,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:47,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:47,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073203803] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:47,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:26:47,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-12-14 13:26:47,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065797896] [2022-12-14 13:26:47,543 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:26:47,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 13:26:47,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 13:26:47,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:26:47,544 INFO L87 Difference]: Start difference. First operand 258 states and 798 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:48,781 INFO L93 Difference]: Finished difference Result 1210 states and 3746 transitions. [2022-12-14 13:26:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:26:48,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:26:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:48,785 INFO L225 Difference]: With dead ends: 1210 [2022-12-14 13:26:48,785 INFO L226 Difference]: Without dead ends: 1210 [2022-12-14 13:26:48,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:26:48,786 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 724 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:48,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 32 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 13:26:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-12-14 13:26:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 308. [2022-12-14 13:26:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 287 states have (on average 3.5261324041811846) internal successors, (1012), 307 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1012 transitions. [2022-12-14 13:26:48,795 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1012 transitions. Word has length 6 [2022-12-14 13:26:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:48,795 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 1012 transitions. [2022-12-14 13:26:48,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1012 transitions. [2022-12-14 13:26:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:26:48,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:48,795 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 13:26:48,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:26:49,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 13:26:49,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 13:26:49,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:26:49,398 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:49,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:49,399 INFO L85 PathProgramCache]: Analyzing trace with hash 236557182, now seen corresponding path program 2 times [2022-12-14 13:26:49,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:49,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225540320] [2022-12-14 13:26:49,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:26:49,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:49,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:49,401 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:49,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 13:26:49,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:26:49,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:26:49,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:26:49,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:49,590 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:49,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:49,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:50,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:50,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225540320] [2022-12-14 13:26:50,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225540320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:50,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1699579180] [2022-12-14 13:26:50,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:26:50,228 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:26:50,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:26:50,229 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:26:50,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 13:26:50,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:26:50,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:26:50,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:26:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:50,456 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:50,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:50,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:51,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1699579180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554467254] [2022-12-14 13:26:51,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:26:51,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:51,259 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:26:51,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:26:51,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:26:51,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:26:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:26:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:51,433 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:51,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:51,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:51,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554467254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:51,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:26:51,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 13:26:51,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304859772] [2022-12-14 13:26:51,625 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:26:51,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:26:51,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:51,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:26:51,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:26:51,627 INFO L87 Difference]: Start difference. First operand 308 states and 1012 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:55,455 INFO L93 Difference]: Finished difference Result 2722 states and 9032 transitions. [2022-12-14 13:26:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:26:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:26:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:55,466 INFO L225 Difference]: With dead ends: 2722 [2022-12-14 13:26:55,466 INFO L226 Difference]: Without dead ends: 2722 [2022-12-14 13:26:55,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:26:55,467 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 783 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:55,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 78 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 13:26:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2022-12-14 13:26:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 314. [2022-12-14 13:26:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 293 states have (on average 3.4948805460750854) internal successors, (1024), 313 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1024 transitions. [2022-12-14 13:26:55,484 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1024 transitions. Word has length 6 [2022-12-14 13:26:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:55,484 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 1024 transitions. [2022-12-14 13:26:55,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1024 transitions. [2022-12-14 13:26:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:26:55,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:55,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:26:55,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 13:26:55,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 13:26:55,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:26:56,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:56,087 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:26:56,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:56,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1235577953, now seen corresponding path program 1 times [2022-12-14 13:26:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:26:56,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784414212] [2022-12-14 13:26:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:56,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:26:56,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:26:56,092 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:26:56,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:26:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:56,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:26:56,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:56,270 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:26:56,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:26:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:26:56,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:26:56,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:26:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784414212] [2022-12-14 13:26:56,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784414212] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081450562] [2022-12-14 13:26:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:56,716 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:26:56,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:26:56,717 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:26:56,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 13:26:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:26:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:56,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:57,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081450562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:57,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564991576] [2022-12-14 13:26:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:57,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:57,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:57,169 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:26:57,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:26:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:57,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:26:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:57,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:57,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564991576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:57,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:26:57,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-12-14 13:26:57,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161987301] [2022-12-14 13:26:57,285 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:26:57,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 13:26:57,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:26:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 13:26:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 13:26:57,286 INFO L87 Difference]: Start difference. First operand 314 states and 1024 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:59,863 INFO L93 Difference]: Finished difference Result 815 states and 2597 transitions. [2022-12-14 13:26:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:26:59,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:26:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:59,870 INFO L225 Difference]: With dead ends: 815 [2022-12-14 13:26:59,870 INFO L226 Difference]: Without dead ends: 815 [2022-12-14 13:26:59,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 13:26:59,871 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 672 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:59,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 53 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 13:26:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-12-14 13:26:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 615. [2022-12-14 13:26:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 594 states have (on average 3.5505050505050506) internal successors, (2109), 614 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2109 transitions. [2022-12-14 13:26:59,882 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2109 transitions. Word has length 7 [2022-12-14 13:26:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:59,882 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2109 transitions. [2022-12-14 13:26:59,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2109 transitions. [2022-12-14 13:26:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:26:59,882 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:59,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:26:59,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 13:27:00,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-12-14 13:27:00,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:27:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:00,485 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:27:00,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:00,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1235394232, now seen corresponding path program 1 times [2022-12-14 13:27:00,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:27:00,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858625937] [2022-12-14 13:27:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:00,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:27:00,488 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:27:00,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:27:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:00,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:27:00,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:00,721 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-12-14 13:27:00,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-12-14 13:27:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:27:00,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:27:00,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:27:00,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858625937] [2022-12-14 13:27:00,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858625937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:00,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:27:00,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:27:00,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948741807] [2022-12-14 13:27:00,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:27:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:00,738 INFO L87 Difference]: Start difference. First operand 615 states and 2109 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:00,832 INFO L93 Difference]: Finished difference Result 567 states and 1957 transitions. [2022-12-14 13:27:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:27:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:00,835 INFO L225 Difference]: With dead ends: 567 [2022-12-14 13:27:00,835 INFO L226 Difference]: Without dead ends: 567 [2022-12-14 13:27:00,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:27:00,836 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:00,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:27:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-12-14 13:27:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-12-14 13:27:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 552 states have (on average 3.545289855072464) internal successors, (1957), 566 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1957 transitions. [2022-12-14 13:27:00,848 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1957 transitions. Word has length 7 [2022-12-14 13:27:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:00,848 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1957 transitions. [2022-12-14 13:27:00,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1957 transitions. [2022-12-14 13:27:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:27:00,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:00,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:00,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:27:01,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:01,050 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:27:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1235394231, now seen corresponding path program 1 times [2022-12-14 13:27:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:27:01,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937583660] [2022-12-14 13:27:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:01,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:01,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:27:01,053 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:27:01,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:27:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:27:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:01,282 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:01,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:01,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:01,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:27:01,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937583660] [2022-12-14 13:27:01,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937583660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:01,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018473464] [2022-12-14 13:27:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:27:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:27:01,606 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:27:01,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 13:27:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:27:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:01,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:01,841 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 13:27:01,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 13:27:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:27:01,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:27:01,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2018473464] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:27:01,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:27:01,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 13:27:01,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200818170] [2022-12-14 13:27:01,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:27:01,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:27:01,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:27:01,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:27:01,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:27:01,916 INFO L87 Difference]: Start difference. First operand 567 states and 1957 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:02,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:02,009 INFO L93 Difference]: Finished difference Result 519 states and 1805 transitions. [2022-12-14 13:27:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:27:02,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:27:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:02,012 INFO L225 Difference]: With dead ends: 519 [2022-12-14 13:27:02,012 INFO L226 Difference]: Without dead ends: 519 [2022-12-14 13:27:02,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:27:02,012 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:02,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:27:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-12-14 13:27:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-12-14 13:27:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 510 states have (on average 3.5392156862745097) internal successors, (1805), 518 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1805 transitions. [2022-12-14 13:27:02,020 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1805 transitions. Word has length 7 [2022-12-14 13:27:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:02,020 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 1805 transitions. [2022-12-14 13:27:02,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1805 transitions. [2022-12-14 13:27:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:27:02,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:02,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:02,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:27:02,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 13:27:02,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:27:02,422 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:27:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash 357479555, now seen corresponding path program 1 times [2022-12-14 13:27:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:27:02,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650355996] [2022-12-14 13:27:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:02,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:02,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:27:02,425 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:27:02,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 13:27:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:27:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:02,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:02,828 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 25 treesize of output 21 [2022-12-14 13:27:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:02,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:27:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650355996] [2022-12-14 13:27:02,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650355996] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [441991663] [2022-12-14 13:27:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:02,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:27:02,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:27:02,892 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:27:02,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-12-14 13:27:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:27:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:03,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:03,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [441991663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:03,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864769223] [2022-12-14 13:27:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:03,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:03,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:03,373 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:27:03,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 13:27:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:27:03,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:03,529 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:03,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:03,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:04,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864769223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:04,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:27:04,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 22 [2022-12-14 13:27:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074759747] [2022-12-14 13:27:04,138 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:27:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 13:27:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:27:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 13:27:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:27:04,139 INFO L87 Difference]: Start difference. First operand 519 states and 1805 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:07,706 INFO L93 Difference]: Finished difference Result 1306 states and 4520 transitions. [2022-12-14 13:27:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:27:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have 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 [2022-12-14 13:27:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:07,711 INFO L225 Difference]: With dead ends: 1306 [2022-12-14 13:27:07,711 INFO L226 Difference]: Without dead ends: 1306 [2022-12-14 13:27:07,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 13:27:07,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 704 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:07,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 51 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 13:27:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-12-14 13:27:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 615. [2022-12-14 13:27:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 606 states have (on average 3.6056105610561056) internal successors, (2185), 614 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2185 transitions. [2022-12-14 13:27:07,728 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2185 transitions. Word has length 8 [2022-12-14 13:27:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:07,728 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2185 transitions. [2022-12-14 13:27:07,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2185 transitions. [2022-12-14 13:27:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:27:07,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:07,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:07,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-12-14 13:27:07,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 13:27:08,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 13:27:08,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:08,331 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:27:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash -54231694, now seen corresponding path program 1 times [2022-12-14 13:27:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:27:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407475130] [2022-12-14 13:27:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:08,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:08,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:27:08,333 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:27:08,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 13:27:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:27:08,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:08,518 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:08,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:08,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:09,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:27:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407475130] [2022-12-14 13:27:09,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407475130] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [128997511] [2022-12-14 13:27:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:09,321 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:27:09,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:27:09,322 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:27:09,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 13:27:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:27:09,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:09,532 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:09,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:09,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:10,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [128997511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:10,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343538918] [2022-12-14 13:27:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:10,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:10,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:10,261 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:27:10,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 13:27:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:10,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:27:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:10,410 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:10,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:10,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:10,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343538918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:10,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:27:10,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-12-14 13:27:10,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376023600] [2022-12-14 13:27:10,745 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:27:10,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 13:27:10,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:27:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 13:27:10,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:27:10,746 INFO L87 Difference]: Start difference. First operand 615 states and 2185 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:16,749 INFO L93 Difference]: Finished difference Result 1360 states and 4946 transitions. [2022-12-14 13:27:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:27:16,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 13:27:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:16,755 INFO L225 Difference]: With dead ends: 1360 [2022-12-14 13:27:16,755 INFO L226 Difference]: Without dead ends: 1360 [2022-12-14 13:27:16,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:27:16,756 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 299 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:16,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 49 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 13:27:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2022-12-14 13:27:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 962. [2022-12-14 13:27:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 953 states have (on average 3.708289611752361) internal successors, (3534), 961 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 3534 transitions. [2022-12-14 13:27:16,773 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 3534 transitions. Word has length 10 [2022-12-14 13:27:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:16,774 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 3534 transitions. [2022-12-14 13:27:16,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 3534 transitions. [2022-12-14 13:27:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:27:16,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:16,774 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:16,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-12-14 13:27:17,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 13:27:17,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 13:27:17,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:17,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:27:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1112338637, now seen corresponding path program 1 times [2022-12-14 13:27:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:27:17,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094360496] [2022-12-14 13:27:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:17,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:27:17,382 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:27:17,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 13:27:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:17,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:27:17,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:17,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:17,835 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 27 treesize of output 23 [2022-12-14 13:27:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:18,011 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:27:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094360496] [2022-12-14 13:27:18,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094360496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:18,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [241244789] [2022-12-14 13:27:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:27:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:27:18,013 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:27:18,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 13:27:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:18,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:27:18,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:18,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:18,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [241244789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:18,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598181643] [2022-12-14 13:27:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:18,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:18,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:18,975 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:27:18,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 13:27:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:19,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:27:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:19,174 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:19,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:19,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:20,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598181643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:20,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:27:20,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 33 [2022-12-14 13:27:20,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406119820] [2022-12-14 13:27:20,295 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:27:20,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:27:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:27:20,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:27:20,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:27:20,296 INFO L87 Difference]: Start difference. First operand 962 states and 3534 transitions. Second operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:31,440 INFO L93 Difference]: Finished difference Result 3214 states and 11520 transitions. [2022-12-14 13:27:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 13:27:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 13:27:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:31,452 INFO L225 Difference]: With dead ends: 3214 [2022-12-14 13:27:31,452 INFO L226 Difference]: Without dead ends: 3214 [2022-12-14 13:27:31,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=753, Invalid=3537, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 13:27:31,454 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1947 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:31,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1947 Valid, 146 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 13:27:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2022-12-14 13:27:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 1421. [2022-12-14 13:27:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1412 states have (on average 3.9242209631728047) internal successors, (5541), 1420 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 5541 transitions. [2022-12-14 13:27:31,505 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 5541 transitions. Word has length 10 [2022-12-14 13:27:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:31,505 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 5541 transitions. [2022-12-14 13:27:31,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 5541 transitions. [2022-12-14 13:27:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:27:31,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:31,507 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-14 13:27:31,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-12-14 13:27:31,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-12-14 13:27:31,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-14 13:27:32,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:32,110 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:27:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1047822691, now seen corresponding path program 2 times [2022-12-14 13:27:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:27:32,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322786040] [2022-12-14 13:27:32,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:27:32,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:32,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:27:32,113 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:27:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 13:27:32,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:27:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:27:32,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:27:32,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:32,352 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:32,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:32,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:33,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:27:33,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322786040] [2022-12-14 13:27:33,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322786040] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:33,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1087882016] [2022-12-14 13:27:33,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:27:33,904 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:27:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:27:33,905 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:27:33,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-12-14 13:27:34,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:27:34,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:27:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:27:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:34,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:34,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:34,226 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 13 treesize of output 9 [2022-12-14 13:27:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:27:34,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:27:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1087882016] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:35,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601182025] [2022-12-14 13:27:35,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:27:35,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:35,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:35,267 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:27:35,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 13:27:35,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:27:35,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:27:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:27:35,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:27:35,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:27:35,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601182025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:35,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:27:35,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-12-14 13:27:35,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806273708] [2022-12-14 13:27:35,892 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:27:35,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 13:27:35,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:27:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 13:27:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 13:27:35,893 INFO L87 Difference]: Start difference. First operand 1421 states and 5541 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:52,432 INFO L93 Difference]: Finished difference Result 2644 states and 9576 transitions. [2022-12-14 13:27:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 13:27:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 13:27:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:52,441 INFO L225 Difference]: With dead ends: 2644 [2022-12-14 13:27:52,441 INFO L226 Difference]: Without dead ends: 2644 [2022-12-14 13:27:52,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=851, Invalid=2689, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:27:52,442 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1145 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:52,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 330 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-12-14 13:27:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2022-12-14 13:27:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1548. [2022-12-14 13:27:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1539 states have (on average 3.8382066276803117) internal successors, (5907), 1547 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5907 transitions. [2022-12-14 13:27:52,476 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5907 transitions. Word has length 11 [2022-12-14 13:27:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:52,477 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 5907 transitions. [2022-12-14 13:27:52,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5907 transitions. [2022-12-14 13:27:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:27:52,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:52,478 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:27:52,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-12-14 13:27:52,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:27:52,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 13:27:53,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:53,080 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:27:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash -576914638, now seen corresponding path program 1 times [2022-12-14 13:27:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:27:53,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245295891] [2022-12-14 13:27:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:53,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:27:53,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:27:53,086 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:27:53,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-12-14 13:27:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:27:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:53,309 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:53,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:53,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:53,610 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 8 treesize of output 6 [2022-12-14 13:27:53,627 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 46 treesize of output 11 [2022-12-14 13:27:53,632 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:27:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:54,095 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:27:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245295891] [2022-12-14 13:27:54,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245295891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [385539873] [2022-12-14 13:27:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:54,095 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:27:54,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:27:54,096 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:27:54,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-12-14 13:27:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:54,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:27:54,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:54,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:55,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [385539873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:55,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365051722] [2022-12-14 13:27:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:55,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:55,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:55,127 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:27:55,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 13:27:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:55,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:27:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:55,328 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:27:55,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:27:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:55,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:55,811 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 8 treesize of output 6 [2022-12-14 13:27:55,829 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 46 treesize of output 11 [2022-12-14 13:27:55,833 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:27:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:56,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365051722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:56,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:27:56,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 28 [2022-12-14 13:27:56,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795664146] [2022-12-14 13:27:56,491 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:27:56,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 13:27:56,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:27:56,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 13:27:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-12-14 13:27:56,492 INFO L87 Difference]: Start difference. First operand 1548 states and 5907 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:59,996 INFO L93 Difference]: Finished difference Result 1558 states and 5867 transitions. [2022-12-14 13:27:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:27:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-12-14 13:27:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:00,001 INFO L225 Difference]: With dead ends: 1558 [2022-12-14 13:28:00,001 INFO L226 Difference]: Without dead ends: 1558 [2022-12-14 13:28:00,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 13:28:00,002 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 271 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:00,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 79 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 13:28:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-12-14 13:28:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1538. [2022-12-14 13:28:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1529 states have (on average 3.817527795945062) internal successors, (5837), 1537 states have internal predecessors, (5837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5837 transitions. [2022-12-14 13:28:00,029 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5837 transitions. Word has length 12 [2022-12-14 13:28:00,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:00,030 INFO L495 AbstractCegarLoop]: Abstraction has 1538 states and 5837 transitions. [2022-12-14 13:28:00,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5837 transitions. [2022-12-14 13:28:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:28:00,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:00,030 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:00,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-12-14 13:28:00,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 13:28:00,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-12-14 13:28:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:28:00,633 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:28:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash -327856257, now seen corresponding path program 2 times [2022-12-14 13:28:00,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:28:00,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707644205] [2022-12-14 13:28:00,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:28:00,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:28:00,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:28:00,638 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:28:00,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-12-14 13:28:00,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:28:00,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:28:00,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:01,078 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:28:01,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:28:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:01,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:03,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:28:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707644205] [2022-12-14 13:28:03,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707644205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:03,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1608018841] [2022-12-14 13:28:03,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:28:03,049 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:28:03,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:28:03,050 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:28:03,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-12-14 13:28:03,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:28:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:03,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:28:03,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:03,398 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:28:03,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:28:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:03,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:04,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1608018841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:04,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202674927] [2022-12-14 13:28:04,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:28:04,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:04,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:04,048 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:04,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 13:28:04,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:28:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:04,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:28:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:04,298 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:28:04,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:28:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:04,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:06,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202674927] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:06,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:28:06,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2022-12-14 13:28:06,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076733345] [2022-12-14 13:28:06,942 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:28:06,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 13:28:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:28:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 13:28:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:28:06,945 INFO L87 Difference]: Start difference. First operand 1538 states and 5837 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:26,151 INFO L93 Difference]: Finished difference Result 2462 states and 9602 transitions. [2022-12-14 13:28:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:28:26,154 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 [2022-12-14 13:28:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:26,160 INFO L225 Difference]: With dead ends: 2462 [2022-12-14 13:28:26,161 INFO L226 Difference]: Without dead ends: 2462 [2022-12-14 13:28:26,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:28:26,161 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 564 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:26,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 107 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-12-14 13:28:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-12-14 13:28:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1928. [2022-12-14 13:28:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1919 states have (on average 4.025534132360605) internal successors, (7725), 1927 states have internal predecessors, (7725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 7725 transitions. [2022-12-14 13:28:26,201 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 7725 transitions. Word has length 12 [2022-12-14 13:28:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:26,201 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 7725 transitions. [2022-12-14 13:28:26,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:26,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 7725 transitions. [2022-12-14 13:28:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:28:26,202 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:26,202 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:26,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 13:28:26,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-12-14 13:28:26,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-12-14 13:28:26,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:28:26,804 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:28:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1476084227, now seen corresponding path program 2 times [2022-12-14 13:28:26,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:28:26,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064750888] [2022-12-14 13:28:26,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:28:26,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:28:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:28:26,810 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:28:26,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 13:28:26,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:28:26,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:28:26,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:27,052 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 13:28:27,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 13:28:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:27,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:28,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:28:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064750888] [2022-12-14 13:28:28,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064750888] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2094193881] [2022-12-14 13:28:28,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:28:28,114 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:28:28,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:28:28,115 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:28:28,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 13:28:28,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:28:28,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:28,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:28:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:29,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:29,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2094193881] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:29,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110031982] [2022-12-14 13:28:29,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:28:29,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:29,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:29,944 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:29,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 13:28:30,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:28:30,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:28:30,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:30,175 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:28:30,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:28:30,875 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 7 treesize of output 5 [2022-12-14 13:28:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:31,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:31,059 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 8 treesize of output 6 [2022-12-14 13:28:31,074 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:28:31,075 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:28:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:33,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110031982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:33,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:28:33,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 48 [2022-12-14 13:28:33,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25747447] [2022-12-14 13:28:33,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:28:33,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 13:28:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:28:33,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 13:28:33,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:28:33,668 INFO L87 Difference]: Start difference. First operand 1928 states and 7725 transitions. Second operand has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:50,492 INFO L93 Difference]: Finished difference Result 3464 states and 12996 transitions. [2022-12-14 13:28:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 13:28:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2022-12-14 13:28:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:50,505 INFO L225 Difference]: With dead ends: 3464 [2022-12-14 13:28:50,505 INFO L226 Difference]: Without dead ends: 3464 [2022-12-14 13:28:50,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=889, Invalid=5117, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 13:28:50,507 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2070 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 4495 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 4531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:50,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2070 Valid, 375 Invalid, 4531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4495 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-12-14 13:28:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2022-12-14 13:28:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2366. [2022-12-14 13:28:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2357 states have (on average 4.165040305473059) internal successors, (9817), 2365 states have internal predecessors, (9817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 9817 transitions. [2022-12-14 13:28:50,557 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 9817 transitions. Word has length 12 [2022-12-14 13:28:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:50,557 INFO L495 AbstractCegarLoop]: Abstraction has 2366 states and 9817 transitions. [2022-12-14 13:28:50,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 9817 transitions. [2022-12-14 13:28:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:28:50,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:50,558 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 13:28:50,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 13:28:50,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-12-14 13:28:50,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-12-14 13:28:51,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:28:51,160 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:28:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:51,161 INFO L85 PathProgramCache]: Analyzing trace with hash -605885474, now seen corresponding path program 3 times [2022-12-14 13:28:51,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:28:51,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461460392] [2022-12-14 13:28:51,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:28:51,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:28:51,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:28:51,165 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:28:51,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 13:28:51,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:28:51,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:51,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:28:51,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:51,622 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:28:51,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:28:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:52,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:54,815 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:28:54,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461460392] [2022-12-14 13:28:54,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461460392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:54,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1516796561] [2022-12-14 13:28:54,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:28:54,815 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:28:54,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:28:54,816 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:28:54,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-12-14 13:28:55,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:28:55,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:55,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:28:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:55,564 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:28:55,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:28:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:55,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:58,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1516796561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:58,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381087479] [2022-12-14 13:28:58,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:28:58,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:58,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:58,801 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:58,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 13:28:59,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:28:59,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:59,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:28:59,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:00,081 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:29:00,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:29:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:00,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:04,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381087479] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:04,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:29:04,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-12-14 13:29:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553667412] [2022-12-14 13:29:04,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:04,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 13:29:04,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:29:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 13:29:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 13:29:04,705 INFO L87 Difference]: Start difference. First operand 2366 states and 9817 transitions. Second operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:26,902 INFO L93 Difference]: Finished difference Result 13450 states and 55062 transitions. [2022-12-14 13:29:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:29:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 13:29:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:26,957 INFO L225 Difference]: With dead ends: 13450 [2022-12-14 13:29:26,957 INFO L226 Difference]: Without dead ends: 13450 [2022-12-14 13:29:26,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=857, Invalid=2005, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 13:29:26,958 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5224 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5224 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 3328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:26,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5224 Valid, 441 Invalid, 3328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-12-14 13:29:26,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13450 states. [2022-12-14 13:29:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13450 to 2378. [2022-12-14 13:29:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2369 states have (on average 4.154073448712537) internal successors, (9841), 2377 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 9841 transitions. [2022-12-14 13:29:27,163 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 9841 transitions. Word has length 12 [2022-12-14 13:29:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:27,163 INFO L495 AbstractCegarLoop]: Abstraction has 2378 states and 9841 transitions. [2022-12-14 13:29:27,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 9841 transitions. [2022-12-14 13:29:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:29:27,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:27,166 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-12-14 13:29:27,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-14 13:29:27,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-14 13:29:27,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-12-14 13:29:27,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:29:27,769 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:29:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:27,770 INFO L85 PathProgramCache]: Analyzing trace with hash 880547519, now seen corresponding path program 3 times [2022-12-14 13:29:27,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:29:27,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946803931] [2022-12-14 13:29:27,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:29:27,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:29:27,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:29:27,772 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:29:27,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-12-14 13:29:28,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:29:28,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:29:28,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:29:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:28,247 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:29:28,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:29:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:28,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:28,891 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 8 treesize of output 6 [2022-12-14 13:29:28,951 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:29:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:31,334 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:29:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946803931] [2022-12-14 13:29:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946803931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [428153168] [2022-12-14 13:29:31,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:29:31,334 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:29:31,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:29:31,335 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:29:31,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-12-14 13:29:32,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:29:32,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:29:32,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 13:29:32,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:32,158 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:29:32,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:29:32,971 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 46 treesize of output 10 [2022-12-14 13:29:32,975 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 7 treesize of output 5 [2022-12-14 13:29:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:32,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:33,046 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 8 treesize of output 6 [2022-12-14 13:29:33,072 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:29:33,073 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:29:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:37,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [428153168] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:37,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129030774] [2022-12-14 13:29:37,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:29:37,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:37,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:37,254 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:37,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 13:29:37,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:29:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:29:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:29:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:38,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:40,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129030774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:40,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:29:40,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 10, 10] total 56 [2022-12-14 13:29:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904288118] [2022-12-14 13:29:40,422 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:40,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 13:29:40,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:29:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 13:29:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2872, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 13:29:40,423 INFO L87 Difference]: Start difference. First operand 2378 states and 9841 transitions. Second operand has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 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) [2022-12-14 13:30:46,917 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 95 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:31:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:04,993 INFO L93 Difference]: Finished difference Result 5518 states and 22047 transitions. [2022-12-14 13:31:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 13:31:04,994 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 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 13 [2022-12-14 13:31:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:05,007 INFO L225 Difference]: With dead ends: 5518 [2022-12-14 13:31:05,007 INFO L226 Difference]: Without dead ends: 5518 [2022-12-14 13:31:05,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 67.4s TimeCoverageRelationStatistics Valid=1440, Invalid=9066, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 13:31:05,009 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2397 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 6154 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 6213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 6154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:05,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2397 Valid, 946 Invalid, 6213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 6154 Invalid, 0 Unknown, 0 Unchecked, 26.2s Time] [2022-12-14 13:31:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5518 states. [2022-12-14 13:31:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5518 to 2942. [2022-12-14 13:31:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2933 states have (on average 4.154108421411524) internal successors, (12184), 2941 states have internal predecessors, (12184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 12184 transitions. [2022-12-14 13:31:05,082 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 12184 transitions. Word has length 13 [2022-12-14 13:31:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:05,082 INFO L495 AbstractCegarLoop]: Abstraction has 2942 states and 12184 transitions. [2022-12-14 13:31:05,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 56 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) [2022-12-14 13:31:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 12184 transitions. [2022-12-14 13:31:05,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:31:05,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:05,083 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:31:05,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-12-14 13:31:05,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-12-14 13:31:05,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-14 13:31:05,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:05,685 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:31:05,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash 484602707, now seen corresponding path program 2 times [2022-12-14 13:31:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:31:05,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166398905] [2022-12-14 13:31:05,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:31:05,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:31:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:31:05,692 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:31:05,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-12-14 13:31:05,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 13:31:05,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:31:05,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:05,900 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:31:05,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:31:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:31:06,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:31:06,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:31:06,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166398905] [2022-12-14 13:31:06,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166398905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:31:06,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:31:06,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:31:06,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90258277] [2022-12-14 13:31:06,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:31:06,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:31:06,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:31:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:31:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:31:06,102 INFO L87 Difference]: Start difference. First operand 2942 states and 12184 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:06,386 INFO L93 Difference]: Finished difference Result 3154 states and 12678 transitions. [2022-12-14 13:31:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:31:06,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 13:31:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:06,394 INFO L225 Difference]: With dead ends: 3154 [2022-12-14 13:31:06,394 INFO L226 Difference]: Without dead ends: 3154 [2022-12-14 13:31:06,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:31:06,395 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:06,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:31:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2022-12-14 13:31:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3140. [2022-12-14 13:31:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3131 states have (on average 4.0415202810603645) internal successors, (12654), 3139 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 12654 transitions. [2022-12-14 13:31:06,442 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 12654 transitions. Word has length 13 [2022-12-14 13:31:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:06,442 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 12654 transitions. [2022-12-14 13:31:06,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 12654 transitions. [2022-12-14 13:31:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:31:06,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:06,444 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:31:06,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-12-14 13:31:06,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:31:06,645 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:31:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1888727890, now seen corresponding path program 3 times [2022-12-14 13:31:06,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:31:06,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004127342] [2022-12-14 13:31:06,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:31:06,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:31:06,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:31:06,647 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:31:06,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-14 13:31:06,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:31:06,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:31:06,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:06,947 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:31:06,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:31:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:31:07,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:31:09,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:31:09,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004127342] [2022-12-14 13:31:09,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004127342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:09,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1154920053] [2022-12-14 13:31:09,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:31:09,193 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:31:09,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:31:09,194 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:31:09,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 13:31:09,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:31:09,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:09,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:31:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:09,552 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:31:09,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:31:09,889 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 7 treesize of output 5 [2022-12-14 13:31:09,898 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 234 treesize of output 90 [2022-12-14 13:31:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:31:10,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:10,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 13:31:10,537 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:31:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:31:12,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1154920053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:12,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450396687] [2022-12-14 13:31:12,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:31:12,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:12,803 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:12,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 13:31:13,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:31:13,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:13,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:31:13,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:13,142 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:31:13,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:31:13,359 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 46 treesize of output 10 [2022-12-14 13:31:13,371 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 7 treesize of output 5 [2022-12-14 13:31:13,378 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:31:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:31:13,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:13,592 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 8 treesize of output 6 [2022-12-14 13:31:13,627 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 46 treesize of output 11 [2022-12-14 13:31:13,630 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:31:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:31:16,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450396687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:16,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:31:16,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 20 [2022-12-14 13:31:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924979500] [2022-12-14 13:31:16,315 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:31:16,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 13:31:16,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:31:16,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 13:31:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:31:16,316 INFO L87 Difference]: Start difference. First operand 3140 states and 12654 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:19,764 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 [] [2022-12-14 13:31:21,957 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 [] [2022-12-14 13:31:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:22,516 INFO L93 Difference]: Finished difference Result 3422 states and 13692 transitions. [2022-12-14 13:31:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:31:22,517 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2022-12-14 13:31:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:22,524 INFO L225 Difference]: With dead ends: 3422 [2022-12-14 13:31:22,525 INFO L226 Difference]: Without dead ends: 3422 [2022-12-14 13:31:22,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:31:22,525 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 339 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:22,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 32 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 270 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-12-14 13:31:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2022-12-14 13:31:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2112. [2022-12-14 13:31:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2107 states have (on average 3.9155196962505934) internal successors, (8250), 2111 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 8250 transitions. [2022-12-14 13:31:22,564 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 8250 transitions. Word has length 14 [2022-12-14 13:31:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:22,564 INFO L495 AbstractCegarLoop]: Abstraction has 2112 states and 8250 transitions. [2022-12-14 13:31:22,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 8250 transitions. [2022-12-14 13:31:22,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:31:22,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:22,565 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:31:22,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-12-14 13:31:22,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 13:31:23,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-12-14 13:31:23,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:31:23,167 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:31:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1976306637, now seen corresponding path program 3 times [2022-12-14 13:31:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:31:23,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785025965] [2022-12-14 13:31:23,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:31:23,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:31:23,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:31:23,171 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:31:23,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-12-14 13:31:23,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:31:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:31:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:23,494 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 13:31:23,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 13:31:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:23,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:24,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:31:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785025965] [2022-12-14 13:31:24,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785025965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [441201917] [2022-12-14 13:31:24,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:31:24,935 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:31:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:31:24,936 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:31:24,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 13:31:25,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:31:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:25,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:31:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:26,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:27,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [441201917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:27,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347245586] [2022-12-14 13:31:27,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:31:27,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:27,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:27,828 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:27,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 13:31:28,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:31:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:31:28,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:28,137 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:31:28,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:31:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:29,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:31,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347245586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:31,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:31:31,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 10, 10] total 56 [2022-12-14 13:31:31,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833812655] [2022-12-14 13:31:31,257 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:31:31,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 13:31:31,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:31:31,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 13:31:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3041, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 13:31:31,258 INFO L87 Difference]: Start difference. First operand 2112 states and 8250 transitions. Second operand has 58 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:56,578 INFO L93 Difference]: Finished difference Result 4284 states and 15126 transitions. [2022-12-14 13:31:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 13:31:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 [2022-12-14 13:31:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:56,587 INFO L225 Difference]: With dead ends: 4284 [2022-12-14 13:31:56,587 INFO L226 Difference]: Without dead ends: 4284 [2022-12-14 13:31:56,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1289, Invalid=8023, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 13:31:56,589 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2635 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 9047 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2635 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 9110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 9047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:56,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2635 Valid, 751 Invalid, 9110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 9047 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2022-12-14 13:31:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2022-12-14 13:31:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 2610. [2022-12-14 13:31:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2605 states have (on average 4.060652591170825) internal successors, (10578), 2609 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 10578 transitions. [2022-12-14 13:31:56,636 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 10578 transitions. Word has length 14 [2022-12-14 13:31:56,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:56,636 INFO L495 AbstractCegarLoop]: Abstraction has 2610 states and 10578 transitions. [2022-12-14 13:31:56,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:56,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 10578 transitions. [2022-12-14 13:31:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:31:56,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:56,638 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2022-12-14 13:31:56,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-12-14 13:31:56,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 13:31:57,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-12-14 13:31:57,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:31:57,240 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:31:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1485313693, now seen corresponding path program 4 times [2022-12-14 13:31:57,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:31:57,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735474030] [2022-12-14 13:31:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:31:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:31:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:31:57,243 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:31:57,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-14 13:31:57,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:31:57,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:31:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:57,515 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:31:57,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:31:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:31:57,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:01,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:32:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735474030] [2022-12-14 13:32:01,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735474030] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531362398] [2022-12-14 13:32:01,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:32:01,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:32:01,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:32:01,261 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:32:01,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-12-14 13:32:01,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:32:01,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:32:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:32:01,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:32:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:32:02,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:32:04,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531362398] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:04,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557303037] [2022-12-14 13:32:04,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:32:04,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:04,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:32:04,294 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:32:04,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 13:32:04,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:32:04,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:32:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:32:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:32:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:32:04,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:32:05,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557303037] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:05,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:32:05,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12, 12, 12, 12] total 52 [2022-12-14 13:32:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334662807] [2022-12-14 13:32:05,024 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:32:05,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 13:32:05,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:32:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 13:32:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=2253, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:32:05,025 INFO L87 Difference]: Start difference. First operand 2610 states and 10578 transitions. Second operand has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:32:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:32:49,770 INFO L93 Difference]: Finished difference Result 4861 states and 18829 transitions. [2022-12-14 13:32:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 13:32:49,772 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-12-14 13:32:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:32:49,782 INFO L225 Difference]: With dead ends: 4861 [2022-12-14 13:32:49,783 INFO L226 Difference]: Without dead ends: 4861 [2022-12-14 13:32:49,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=1872, Invalid=7248, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 13:32:49,784 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2022 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 5507 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 5559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:32:49,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2022 Valid, 957 Invalid, 5559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5507 Invalid, 0 Unknown, 0 Unchecked, 22.3s Time] [2022-12-14 13:32:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2022-12-14 13:32:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3145. [2022-12-14 13:32:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3140 states have (on average 4.176114649681528) internal successors, (13113), 3144 states have internal predecessors, (13113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:32:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 13113 transitions. [2022-12-14 13:32:49,844 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 13113 transitions. Word has length 15 [2022-12-14 13:32:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:32:49,844 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 13113 transitions. [2022-12-14 13:32:49,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:32:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 13113 transitions. [2022-12-14 13:32:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:32:49,846 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:32:49,846 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-14 13:32:49,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-12-14 13:32:50,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-12-14 13:32:50,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-12-14 13:32:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:32:50,448 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:32:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:32:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash 6054559, now seen corresponding path program 5 times [2022-12-14 13:32:50,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:32:50,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337493379] [2022-12-14 13:32:50,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:32:50,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:32:50,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:32:50,452 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:32:50,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-12-14 13:32:50,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 13:32:50,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:32:50,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:32:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:32:50,794 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:32:50,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:32:51,269 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 7 treesize of output 5 [2022-12-14 13:32:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:51,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:51,723 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 8 treesize of output 6 [2022-12-14 13:32:51,750 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:32:51,752 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:32:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:55,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:32:55,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337493379] [2022-12-14 13:32:55,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337493379] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:55,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928814079] [2022-12-14 13:32:55,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:32:55,359 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:32:55,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:32:55,359 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:32:55,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-12-14 13:32:55,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 13:32:55,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:32:55,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:32:55,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:32:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:57,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:32:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:59,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1928814079] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:59,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577786950] [2022-12-14 13:32:59,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:32:59,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:59,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:32:59,579 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:32:59,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 13:33:00,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 13:33:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:33:00,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:33:00,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:01,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:03,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577786950] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:03,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:33:03,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-12-14 13:33:03,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398417647] [2022-12-14 13:33:03,542 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:03,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 13:33:03,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:33:03,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 13:33:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=4360, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 13:33:03,544 INFO L87 Difference]: Start difference. First operand 3145 states and 13113 transitions. Second operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:46,615 INFO L93 Difference]: Finished difference Result 4803 states and 18161 transitions. [2022-12-14 13:33:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 13:33:46,616 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-12-14 13:33:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:46,630 INFO L225 Difference]: With dead ends: 4803 [2022-12-14 13:33:46,630 INFO L226 Difference]: Without dead ends: 4803 [2022-12-14 13:33:46,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=2324, Invalid=12438, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 13:33:46,632 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2524 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 9057 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 9124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 9057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:46,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2524 Valid, 1634 Invalid, 9124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 9057 Invalid, 0 Unknown, 0 Unchecked, 19.8s Time] [2022-12-14 13:33:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2022-12-14 13:33:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2765. [2022-12-14 13:33:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2760 states have (on average 3.892391304347826) internal successors, (10743), 2764 states have internal predecessors, (10743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 10743 transitions. [2022-12-14 13:33:46,700 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 10743 transitions. Word has length 15 [2022-12-14 13:33:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:46,700 INFO L495 AbstractCegarLoop]: Abstraction has 2765 states and 10743 transitions. [2022-12-14 13:33:46,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 10743 transitions. [2022-12-14 13:33:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:33:46,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:46,702 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:46,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-12-14 13:33:46,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-14 13:33:47,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-12-14 13:33:47,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:33:47,304 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:33:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash -161652861, now seen corresponding path program 4 times [2022-12-14 13:33:47,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:33:47,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266714058] [2022-12-14 13:33:47,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:33:47,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:33:47,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:33:47,310 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:33:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-12-14 13:33:47,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:33:47,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:33:47,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:33:47,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:48,723 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 38 treesize of output 32 [2022-12-14 13:33:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:49,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:33:49,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266714058] [2022-12-14 13:33:49,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266714058] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:49,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [848657252] [2022-12-14 13:33:49,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:33:49,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:33:49,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:33:49,574 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:33:49,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-12-14 13:33:49,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:33:49,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:33:49,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:33:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:50,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:53,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [848657252] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:53,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758418596] [2022-12-14 13:33:53,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:33:53,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:53,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:53,232 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:53,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-14 13:33:53,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:33:53,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:33:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 13:33:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:53,462 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:33:53,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:33:54,930 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 7 treesize of output 5 [2022-12-14 13:33:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:55,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:55,143 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 8 treesize of output 6 [2022-12-14 13:33:55,158 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:33:55,159 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:34:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:01,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758418596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:34:01,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:34:01,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 71 [2022-12-14 13:34:01,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310458294] [2022-12-14 13:34:01,319 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:34:01,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 13:34:01,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:34:01,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 13:34:01,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=4870, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 13:34:01,320 INFO L87 Difference]: Start difference. First operand 2765 states and 10743 transitions. Second operand has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 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) [2022-12-14 13:36:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:03,736 INFO L93 Difference]: Finished difference Result 15045 states and 53965 transitions. [2022-12-14 13:36:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-12-14 13:36:03,737 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 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 16 [2022-12-14 13:36:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:03,769 INFO L225 Difference]: With dead ends: 15045 [2022-12-14 13:36:03,769 INFO L226 Difference]: Without dead ends: 15045 [2022-12-14 13:36:03,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9286 ImplicationChecksByTransitivity, 88.1s TimeCoverageRelationStatistics Valid=4301, Invalid=29005, Unknown=0, NotChecked=0, Total=33306 [2022-12-14 13:36:03,772 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11090 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 13418 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11090 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 13658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 13418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:03,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11090 Valid, 1133 Invalid, 13658 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [240 Valid, 13418 Invalid, 0 Unknown, 0 Unchecked, 45.5s Time] [2022-12-14 13:36:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15045 states. [2022-12-14 13:36:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15045 to 2701. [2022-12-14 13:36:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2696 states have (on average 3.904673590504451) internal successors, (10527), 2700 states have internal predecessors, (10527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 10527 transitions. [2022-12-14 13:36:03,904 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 10527 transitions. Word has length 16 [2022-12-14 13:36:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:03,904 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 10527 transitions. [2022-12-14 13:36:03,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 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) [2022-12-14 13:36:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 10527 transitions. [2022-12-14 13:36:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:36:03,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:03,907 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:03,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-12-14 13:36:04,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-14 13:36:04,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-12-14 13:36:04,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:36:04,510 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:36:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2107070157, now seen corresponding path program 5 times [2022-12-14 13:36:04,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:36:04,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402983334] [2022-12-14 13:36:04,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:36:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:36:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:36:04,514 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:36:04,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-12-14 13:36:04,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 13:36:04,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:36:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:36:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:05,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:06,467 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 38 treesize of output 32 [2022-12-14 13:36:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:07,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:36:07,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402983334] [2022-12-14 13:36:07,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402983334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:07,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1570234593] [2022-12-14 13:36:07,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:36:07,456 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:36:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:36:07,457 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:36:07,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-12-14 13:36:08,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 13:36:08,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:36:08,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 13:36:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:09,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:13,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1570234593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:13,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934386069] [2022-12-14 13:36:13,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 13:36:13,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:13,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:13,213 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:13,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-14 13:36:15,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 13:36:15,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:36:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 13:36:15,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:15,202 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:36:15,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:36:17,004 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 7 treesize of output 5 [2022-12-14 13:36:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:17,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:17,459 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 8 treesize of output 6 [2022-12-14 13:36:17,483 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:36:17,485 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:36:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:36:25,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934386069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:25,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:36:25,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 82 [2022-12-14 13:36:25,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249965830] [2022-12-14 13:36:25,199 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:36:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-14 13:36:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:36:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-14 13:36:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=6505, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 13:36:25,201 INFO L87 Difference]: Start difference. First operand 2701 states and 10527 transitions. Second operand has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 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) [2022-12-14 13:40:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:40:24,878 INFO L93 Difference]: Finished difference Result 19052 states and 68748 transitions. [2022-12-14 13:40:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-12-14 13:40:24,879 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 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) Word has length 18 [2022-12-14 13:40:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:40:24,934 INFO L225 Difference]: With dead ends: 19052 [2022-12-14 13:40:24,934 INFO L226 Difference]: Without dead ends: 19052 [2022-12-14 13:40:24,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13401 ImplicationChecksByTransitivity, 170.3s TimeCoverageRelationStatistics Valid=5749, Invalid=41557, Unknown=0, NotChecked=0, Total=47306 [2022-12-14 13:40:24,937 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 15826 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 24943 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15826 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 25242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 24943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:40:24,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15826 Valid, 2058 Invalid, 25242 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [299 Valid, 24943 Invalid, 0 Unknown, 0 Unchecked, 84.2s Time] [2022-12-14 13:40:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19052 states. [2022-12-14 13:40:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19052 to 3988. [2022-12-14 13:40:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3983 states have (on average 4.119005774541803) internal successors, (16406), 3987 states have internal predecessors, (16406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:40:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 16406 transitions. [2022-12-14 13:40:25,094 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 16406 transitions. Word has length 18 [2022-12-14 13:40:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:40:25,094 INFO L495 AbstractCegarLoop]: Abstraction has 3988 states and 16406 transitions. [2022-12-14 13:40:25,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 83 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) [2022-12-14 13:40:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 16406 transitions. [2022-12-14 13:40:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 13:40:25,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:40:25,099 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:40:25,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-12-14 13:40:25,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-14 13:40:25,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-12-14 13:40:25,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:40:25,701 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 13:40:25,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:40:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash -296153853, now seen corresponding path program 6 times [2022-12-14 13:40:25,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:40:25,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943989549] [2022-12-14 13:40:25,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 13:40:25,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:40:25,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:40:25,707 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 13:40:25,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-12-14 13:40:25,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 13:40:25,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:40:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:40:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:26,108 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 13:40:26,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 13:40:26,473 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 36 treesize of output 12 [2022-12-14 13:40:26,479 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 7 treesize of output 5 [2022-12-14 13:40:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:26,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:40:26,650 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 8 treesize of output 6 [2022-12-14 13:40:26,666 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:40:26,668 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:40:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:30,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:40:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943989549] [2022-12-14 13:40:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943989549] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:40:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [417284891] [2022-12-14 13:40:30,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 13:40:30,841 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:40:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:40:30,842 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:40:30,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-12-14 13:40:31,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 13:40:31,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:40:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 13:40:31,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:31,846 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:40:31,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:40:33,842 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 208 treesize of output 80 [2022-12-14 13:40:33,850 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 77 treesize of output 71 [2022-12-14 13:40:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:34,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:40:35,527 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 8 treesize of output 6 [2022-12-14 13:40:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:43,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [417284891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:40:43,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096636312] [2022-12-14 13:40:43,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 13:40:43,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:40:43,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:40:43,017 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:40:43,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6986f2db-f6fd-4358-aac0-02dc305a76c6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-14 13:40:43,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-14 13:40:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:40:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 13:40:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:40:43,883 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 13:40:43,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 13:40:46,997 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 7 treesize of output 5 [2022-12-14 13:40:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:47,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:40:47,303 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 8 treesize of output 6 [2022-12-14 13:40:47,319 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:40:47,324 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 13:40:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:40:53,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096636312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:40:53,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:40:53,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 88 [2022-12-14 13:40:53,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694482882] [2022-12-14 13:40:53,348 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:40:53,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-14 13:40:53,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:40:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-14 13:40:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=7312, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 13:40:53,349 INFO L87 Difference]: Start difference. First operand 3988 states and 16406 transitions. Second operand has 90 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 89 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)